Numerical experiments: The climate model used is the fast air sea coupling model (FAMOUS) jointly developed by the British Meteorological Office and British universities The horizontal resolution of the atmospheric model in the FAMOUS model is 5 ° × 7.5 °, 11 layers in vertical direction; The horizontal resolution of the ocean model is 2.5 ° × 3.75 °, 20 layers in vertical direction The atmosphere and ocean are coupled once a day without flux adjustment The tests included the Middle Paleocene (MP,~60Ma BP, test name flat_60ma_1xCO2_sea_3d_ * * 100yr_mean. nc) and the Late Oligocene (LO,~25Ma BP, test name orog_25ma_1xCO2_sea_3d_ * * 100yr_mean. nc) The sea land distribution data is mainly taken from the global coastline basic data set (abbreviated as Gplates, website: http://www.gplates.org/ ）Considering that the initial uplift of Cenozoic terrains such as the Qinghai Tibet Plateau started at about 50~55 Ma (Searle et al., 1987), the global terrain height was set to 0 in the MP test to omit the role of plateau terrain. At 25 Ma, Greenland (Zachos et al., 2001) and the Qinghai Tibet Plateau (for example, Wang et al., 2014; Ding et al., 2014; Rowley and Currie, 2006; DeCells et al., 2007; Polisar et al., 2009) were revised The change of ancient latitude is also considered when reconstructing the ancient topography of the Qinghai Tibet Plateau (Besse et al., 1984; Chatterjee et al., 2013; Wei et al., 2013) At the same time, referring to the change of Cenozoic atmospheric CO2 (Beerling and Royer, 2011), the atmospheric CO2 concentration in the two periods of experiments was 280 ppmv (1 ppmv=1 mg L – 1) before the industrial revolution For simplicity, all land vegetation and soil properties are set to globally uniform values, that is, various land surface properties on each land grid point except Antarctica are assigned to the global average value of non glacial land surface before the industrial revolution, which is also convenient for highlighting the impact of land sea distribution and topographic changes In addition, since we mainly discuss the average climate state and its change in the characteristic geological period on the scale of millions of years, we can omit the influence of orbital forcing, that is, the Earth's orbital parameters are set to their modern values in all experiments Output time: All tests were integrated for 1000 years, using the average results of the last 100 years of each test. This data is helpful to explore the formation and evolution mechanism of the Cenozoic monsoon and drought.
LIU Xiaodong
There are 396 temperature-sensitive proxy data for the past millennium over the Northern Hemisphere, including 370 tree rings, 15 ice cores, 9 lake sediments and 2 historical documents; This data is derived from the global temperature proxy dataset released by PAGES2k Consortum in 2017; During the process of temperature assimilation in the past millennium (1000-2000 AD) in the Northern Hemisphere, the data were further screened, and only the data with annual resolution were retained; The proxy data contained in the dataset have passed strict quality inspection and temperature signal verification; The data set can be used to reconstruct the temperature of the Northern Hemisphere at the hemispherical and regional scales for the past millennium.
FANG Miao
Karakul lake is the distal proglacial lake of the Muztagh Ata glaciers in Xinjiang, and its material input is mainly affected by glacier changes. The Karakul lake sediment core was drilled in the deepest part of the Karakul Lake (38 ° 26.56 ′ N, 75 ° 03.65 ′ E, water depth of 19m) in June and July, 2013, by the research group of prof. Xubaiqing, Institute of Tibetan Plateau Research. The length of the sediment core was 14.16m. This data set is the geochemical data of the lake sediment core, providing high-resolution (0.2mm) information of geochemical elements' contents. The element data was obtained using the nondestructive X-ray fluorescence (XRF) measurements (Itrax Core Scanner, Sweden). The measurement was performed in the Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Chinese Academy of Sciences. The element content in this data set changes obviously, among which the Zr element, Zr/Rb ratio and Rb/Sr ratio provides the long-term glacier change history in Muztagh Ata region, while Ti element provides the dust change history. These data are of great scientific significance for studying the long-term paleoclimate and environmental change histories in the the westerly-dominated region.
XU Baiqing, ZHANG Xiaolong
(1) Data content: data set of precipitation field of the three poles (Arctic, Antarctic and Qinghai Tibet Plateau) in the past millennium; (2) Data source and processing method: the data is independently produced by the author and is produced by assimilating the precipitation proxy data in the three polar regions through the paleoclimate data assimilation method; (3) Data quality description: there is a high degree of spatial-temporal consistency between the data set and the precipitation data sets measured by multiple instruments (correlation coefficient is above 0.35, P < 0.001; Nash efficiency coefficient is above 0.3). In addition, the correlation coefficient with multiple precipitation data series reconstructed based on proxy data is between 0.2 and 0.6 (P < 0.001); (4) It can be used to study the temporal and spatial changes of precipitation in the past millennium in the three polar regions.
FANG Miao
(1) Data content: Millennial temperature (near-surface air temperature anomaly based on the millinnial mean）datasets over the three poles, e.g., Arctic, Antarctic, and Qinghai-Tibet Plateau; (2) Data sources and processing methods: These datasets were produced by the authors themselves using the paleoclimate data assimilationand approach based on climatic proxies over the three poles; (3) Description of data quality: There are high spatio-temporal consistency between these datasets and several instrumental gridded temperature datasets (correlation coefficient above 0.6, p <0.001; Nash efficiency coefficient above 0.5). In addition, the correlations between these datasets and several proxy-based temperature series are between 0.4 and 0.8 (p <0.001). (4) Data application achievements and prospects: These datasets can be used to investigate the temporal and spatial variations in temperature over the three poles during the past millennium.
FANG Miao
1) The data content is the exposure age of the Cosmogenic Nuclide 10Be of the moraine left by the glaciers around the Muztagh Ata peak in the Holocene, including the sampling location, 10Be concentration, calculation results, etc. 2) 10Be concentration data are from published literature. Referring to the latest 10Be yield in the world, three different yield correction methods are used to calculate the exposure age of moraine samples. 3) Compared with the chronological data of the original published literature, this data is more accurate, and the chronological results given by the three methods can be compared with each other, with better concentration within the error range. 4) The data can be used to understand the Holocene change law of glaciers in Pamir region and provide data support for chronological comparison of glacial evolution in the northwest of the plateau.
XU Xiangke, XU Baiqing
1) The data include annual scale oxygen isotope and accumulation records of ice cores from 1900 to 2011, which respectively reflect the temperature and precipitation changes in the study area; 2) For analysis, the ice core samples were first measured using Picaro δ 18O and as per δ The seasonal variation characteristics of 18O determine the age of ice core; The accumulation of ice cores is calculated according to the density of ice cores, the length of ice cores per year and the glacier flow model; 3) Professional laboratory personnel and front-line scientific research personnel operate and maintain the instrument to ensure the reliability of analysis data; 4) The data can be used to analyze the climate and environmental changes in the typical westerly region of the Qinghai Tibet Plateau over the past 100 years, and can be used to explore the evolution of glaciers in this period, providing scientific reference for predicting the future evolution of glaciers, changes in hydrology and water resources and their impact on human activities.
XU Baiqing
This data is the runoff data of nalun hydrological station in the upper reaches of the SYR River from 1753 to May to August 2017 reconstructed based on tree ring data. It is obtained from the tree ring hydrological research jointly carried out by Urumqi desert Meteorological Institute of China Meteorological Administration and the Institute of water and Hydropower of the Kyrgyz National Academy of Sciences. The data can be used for scientific research such as water resources assessment and water conservancy projects in mountainous areas of Central Asia, and the observation time is the calibration period, The linear transformation equation of runoff and tree ring data is established to reconstruct the path quantity. Data period: 1753 to 2017. Data element: average runoff from May to August (m3 / s) Station location: 41.43 ° ″ n, 76.02 ° ″ e, 2039m
ZHANG Ruibo
This data includes 50 14C dating data of 5 Lake cores (ANGREN jincuo, Yilong lake, guozhaco, bangdaco and gongzhucuo). The age control of lake sediment cores depends on radiocarbon isotope (14C) dating. The chemical treatment and analysis test of this batch of samples were completed in Miami beta laboratory and Peking University in the United States. The test time was 2018-2022. The test process was carried out in strict accordance with relevant standards. The data sheet includes the lake core sample number, laboratory sample number, dating sample depth, 14C dating results, dating error and corrected results, etc. Good chronological control is the basis of paleoenvironmental reconstruction.
HOU Juzhi, WU Duo
Understanding the modern relationships between pollen and vegetation, climate, and human land-use completely, is essential for quantitative reconstructions of past vegetation, climate and human impacts. supported by the Second Tibetan Plateau Scientific Expedition Program, we have collected more than 700 surface-soil samples together with detail vegetation survey. Hitherto, pollen analysis of 318 samples have been completed, and the submitted modern pollen dataset includes the pollen percentages of 24 common taxa, the sampling sites of the dataset cover the all vegetation types on the east and central Tibetan Plateau. The dataset can be utilized in establishment for pollen-climate, pollen-vegetation calibration-sets.
CAO Xianyong
1) Data content: The paleomagnetic data can establish the paleomagnetic time frame of huatougou section, and the grain size, magnetic indexes and geochemical indexes can restore the climate change in geological history. 2) Data sources and processing methods Data sources are experimental data. Paleomagnetic data: 2x2x2 cm cylindrical samples were drilled with a small gasoline drill and measured in a magnetic shielding chamber with a cryogenic superconducting magnetometer. Magnetic data: The samples collected in the field were ground into fine particles in a 2x2x2 non-magnetic plastic box with a mortar, and tested with a Kapobridge magnetometer, pulse magnetometer and rotary magnetometer. Grain size data: Analysis of decomposed samples using a Malvern Mastersizer 2000 particle size analyzer. Prior to analysis, organic matter was removed with hot hydrogen peroxide and then carbonate was removed with hydrochloric acid in accordance with standard Procedures of Lanzhou University. Geochemical data: Take a small amount of samples to be pounded with agate mortar and ground into powder, and then sieve with a 200-mesh sieve to ensure that the samples meet test standards. After all the samples were ground and sifted, the samples were placed lightly in the groove of the slide and scraped to be flush with the surrounding slide. A PANalytical X 'Pert Pro MPD Polycrystal X-ray diffractometer was used as the test instrument. 3) Data quality Sample collection and experimental processing were carried out in accordance with strict standards, and the data obtained were of reliable quality. 4) Data application achievements and prospects Two SCI papers were published using these data, one of which was Ni.
NIE Junsheng
1) Data content: Element content and carbon and oxygen isotope analysis are important indexes for Miocene paleoclimate reconstruction in Tarim Basin 2) Data sources and processing methods Iron content: 4g samples were placed in vibration mill, grinding to less than 200 mesh, the samples were pressed in boric acid with hydraulic press, and finally measured in X-ray fluorescence spectrometer. Isotope: The sample is dried at 40℃, then refined to less than 200 mesh, and reacts with 100% phosphoric acid to release CO2 gas in a gas source isophase mass spectrometer. 3) Data quality Sample collection and experimental processing were carried out in accordance with strict standards, and the data obtained were of reliable quality. 4) Data application achievements and prospects Published one SCI paper with this plan.
NIE Junsheng
Magnetic susceptibility and chromaticity data of the Oligocene Baiyanghe Formation in the southern margin of the Jiuxi Basin on the northeastern margin of the Tibet Plateau. The data are experimental data. The average sampling interval in the field is 1m, and a total of 437 pieces of magnetic susceptibility and chromaticity data were obtained. Magnetic susceptibility data was measured with a Bartington MS-2 portable magnetic susceptibility meter; chromaticity data was measured with a Konica Minolta CM-700 spectrophotometer. Sample collection, pre-processing and experimental procedures were carried out in accordance with strict standards, and the quality of the data obtained was reliable. The results show that the magnetic susceptibility and chromaticity values in the lower part of Baiyanghe Formation have consistent and obvious changes. Combined with the variation characteristics of the strata sedimentary facies in the profile, it is believed that a climate change event occurred in the early Baiyanghe Formation in the southern margin of the Jiuxi Basin. A large number of previous studies on stratigraphy, sedimentology and thermochronology revealed that there were no obvious tectonic events in the northeastern margin of the Tibet Plateau during this period, indicating that the climate change events in this area may be caused by regional climate changes. The climate information reflected by the magnetic susceptibility and chromaticity data of the Baiyanghe Formation in the southern margin of the Jiuxi Basin can provide data support for the study of the paleoclimate in the northeastern margin of the Tibet Plateau.
DAI Shuang
1) Data content: Paleomagnetic data can establish paleomagnetic time frame, magnetic and geochemical indicators can restore the climate change in geological history, and heavy mineral analysis can be used to trace provenance. 2) Data sources and processing methods Data sources are experimental data. Magnetic data: The samples collected in the field were ground into fine particles in a 2x2x2 non-magnetic plastic box with a mortar, and tested with a Kapobridge magnetometer, pulse magnetometer and rotary magnetometer. Carbon isotope data: The samples were dried at 40℃, then studied to less than 200 mesh, and reacted with 100% phosphoric acid to release CO2 gas in a gas source isophase mass spectrometer. Grain size data: Analysis of decomposed samples using a Malvern Mastersizer 2000 particle size analyzer. Prior to analysis, organic matter was removed with hot hydrogen peroxide and then carbonate was removed with hydrochloric acid in accordance with standard Procedures of Lanzhou University. 3) Data quality Sample collection and experimental processing were carried out in accordance with strict standards, and the data obtained were of reliable quality. 4) Data application achievements and prospects One SCI paper was published using the data, which was Ni.
NIE Junsheng
This dataset includes contents, stable carbon and oxygen isotopes of carbonates in the Qom section, Central Iran. Stable carbon and oxygen isotopes from carbonates are important climatic proxies in paleoenvironmental reconstruction. The sediment samples were grounded and sieved through a 100 mesh screen, and then directly analyzed using an isotope ratio mass spectrometer (MAT-252) with an automated carbonate preparation device (Kiel Ⅱ). C, O isotope ratios are converted to Vienna Pee Dee Belemnite (V-PDB) standards. Typical analytical errors for C, O isotope are within ±0.1‰ (±0.06‰ and ±0.08‰ for carbon isotope and oxygen isotope, respectively). The carbonate content was measured by neutralization titration with an accuracy of 0.5%. The ages of the data were obtained by linear interpolation based on magnetostratigraphy. Based on the carbonate concentrations and the stable carbon and oxygen isotopes of the Qom Basin the Miocene paleoenvironmental evolution history can be well reconstructed, being useful for discussing the environmental effects of the uplift of the Arabia-Eurasia collision and the global climatic changes. This study aims to analyze the history of climate change in central Iran since the mid-late Miocene, and finally reveals the intensification of aridity in central Iran since 13 Ma.
SUN Jimin
This dataset includes contents, stable carbon and oxygen isotopes of carbonates in the Aksu section, Tajik Basin. Stable carbon and oxygen isotopes from carbonates are important climatic proxies in paleoenvironmental reconstruction. The samples are sampled from fine-grained sediments (siltstone, clay) in the late Eocene-early Oligocene continental strata of the Aksu section in the central Tajik Basin. The sediment samples were grounded and sieved through a 100 mesh screen, and then directly analyzed using an isotope ratio mass spectrometer (MAT-252) with an automated carbonate preparation device (Kiel Ⅱ). C, O isotope ratios are converted to Vienna Pee Dee Belemnite (V-PDB) standards. Typical analytical errors for C, O isotope are within ±0.1‰ (±0.06‰ and ±0.08‰ for carbon isotope and oxygen isotope, respectively). The carbonate content was measured by neutralization titration with an accuracy of 0.5%. The ages of the data were obtained by linear interpolation based on magnetostratigraphy. Based on the carbonate concentrations and the stable carbon and oxygen isotopes of the Tajik Basin, the paleoenvironmental evolution history during the late Eocene and early Oligocene can be well reconstructed, being useful for discussing the environmental effects of the uplift of the Indo-Eurasia collision and the global climatic changes.
SUN Jimin
Recent paleobotanical investigations in Vietnam provide a good opportunity to improve our understanding of the biodiversity and paleoclimatic conditions in the geological past of Southeast Asia. Palms (Arecaceae) are a diverse family of typical thermophilous plants with a relatively low tolerance for freezing. In this study, we describe well-preserved fossil palm leaves from the Oligocene Dong Ho Formation of Hoanh Bo Basin, northern Vietnam. Characters of the fossil leaves, such as a fan-shaped costapalmate lamina, an unarmed petiole, a costa slightly enlarged at the base that then tapers distally into the blade, and well-preserved amphistomatic leaves with cuticles, suggest that they represent a new fossil species, which we herein designate Sabalites colaniae A. Song, T. Su, T. V. Do et Z.K. Zhou sp. nov. Together with other paleontological and palaeoclimatic evidence, we conclude that a warm climate prevailed in northern Vietnam and nearby areas during the Oligocene.
SU Tao
The West Kunlun region forms the northern margin of the Tibetan Plateau, and sedimentation in this region contributed to plateau formation and its northwards expansion, as well as the development of central Asian aridification. However, the stratigraphic dating framework in this region has been ambiguous, hampering the understanding of both tectonic and environmental evolution. Here, palynological analysis was performed on the Xialafudie Formation in the West Kunlun region. Together with the palynological assemblage and megafossils found in the study section, as well as regional stratigraphic comparison, we conclude that the Xialafudie Formation was deposited during the Pliocene, and not Early Cretaceous as previously reported. The palynological assemblage of the section is mainly composed of drought-tolerant herbs and shrubs, and the percentage of conifers and broadleaved trees is very low, indicating that a dry and cold environment prevailed in the West Kunlun region during the Pliocene. Comprehensively analysed palynological data from the Tarim Basin and its surroundings show that aridification intensified in this part of central Asia during the Pliocene, as a result of long-term global cooling and regional tectonism.
SU Tao
The growth of the Tibetan Plateau throughout the past 66 million years has profoundly affected the Asian climate, but how this unparalleled orogenesis might have driven vegetation and plant diversity changes in eastern Asia is poorly understood. We approach this question by integrating modeling results and fossil data. We show that growth of north and northeastern Tibet affects vegetation and, crucially, plant diversity in eastern Asia by altering the monsoon system. This northern Tibetan orographic change induces a precipitation increase, especially in the dry (winter) season, resulting in a transition from deciduous broadleaf vegetation to evergreen broadleaf vegetation and plant diversity increases across southeastern Asia. Further quantifying the complexity of Tibetan orographic change is critical for understanding the finer details of Asian vegetation and plant diversity evolution. *: Corresponding author
SU Tao
The Qinghai–Tibetan Plateau (QTP) played a crucial role in shaping the biodiversity in Asia during the Cenozoic. However, fossil records attributed to insects are still scarce from the QTP, which limits our understanding on the evolution of biodiversity in this large region. Fulgoridae (lanternfly) is a group of large planthopper in body size, which is found primarily in tropical regions. The majority of the Fulgoridae bear brilliant colors and elongated heads. The fossil records of Fulgoridae span from the Eocene to Miocene in the Northern Hemisphere, and only a few fossil species from Neogene deposits have been reported in Asia so far. Here, we report a new fossil record of Fulgoridae from the middle Eocene Lunpola Basin, central QTP. The specimen is in lateral compression, with complete abdomen, thorax, and part of the wings preserved, while most of the head is missing. It belongs to the “lower Fulgoroidea” judging by several strong lateral spines on the hind tibia and a row of teeth at the apex of the second metatarsomere. This fossil specimen is assigned to Fulgoridae by comparison with nine families of the “lower Fulgoroidea”. The specimen represents the earliest Fulgoridae fossil record in Asia and was considered a new morphotaxon based on the peculiar legs and wings. Based on the modern distribution of fulgorid and other paleontological evidence, we suggest a warm climate with relatively low elevation during the middle Eocene in the central QTP. Therefore, this new fossil record not only provides important information on insect diversity in the middle Eocene, but also gives new evidence on the paleoenvironment in the core area of the QTP from the perspective of an insect.
SU Tao
This paper describes a plant megafossil assemblage from the Pliocene strata of Xiangzi, Zanda Basin in the western Qinghai-Tibet Plateau. Twenty-one species belonging to 12 genera and 10 families were identified. Studies show that the Pliocene vegetation in Zanda Basin was mostly deciduous shrub composed of Cotoneaster, Spiraea, Caragana, Hippophae, Rhododendron, Potentilla fruticosa, etc. Leaf sizes of these taxa were generally small. Paleoclimate reconstruction using Coexistence Analysis and CLAMP showed that this area had higher temperature and precipitation in the Pliocene than today, and distinct seasonal precipitation variability was established. The reconstructed paleoelevation of Zanda Basin in the Pliocene was similar to modern times. In the context of central Asian aridification, the gradual drought in the area beginning in the late Cenozoic caused vegetation to transition from shrub to desert, and the flora composition also changed.
SU Tao
Sclerophyllous evergreen broad-leaved forests, mainly made up of sclerophyllous oak, Quercus section Heterobalanus (Øerst.) Menitsky, Fagaceae, represent the most typical forest type in the Hengduan Mountains. Their distribution pattern is closely related to the growth and formation of the Qinghai-Tibetan Plateau (QTP). The oldest fossil record of Quercus sect. Heterobalanus so far discovered is from the middle Miocene of the Gazhacun Formation in Namling County, southern Tibet. However, our recent discovery of leaf fossils from the upper Eocene of Lawula Formation in Markam Basin, southeastern Tibet, illustrates that their origin is nearly 20 Myr older than previously assumed. By integrating the results from geometric morphometrics, geographical range expansion, and ecological niche shifts of this section in what is now the QTP and the Hengduan Mountains, we infer that the leaves of Quercus sect. Heterobalanus were already adapted to cool and dry conditions in some local regions no later than in the late Eocene. Then, with the growth of the QTP and late Cenozoic global cooling, the expansion of cooler and drier habitats benefited the spread and development of this section and their leaves exhibited morphological stasis through stabilizing selection. Based on published fossil records and recent discoveries, we argue that Quercus sect. Heterobalanus appeared in the subtropical evergreen and deciduous broad-leaved mixed forests of the southeastern margin of what is now the QTP no later than in the late Eocene. Some taxa spread westwards along the Gangdese Mountains and later the Himalaya, and others spread eastwards and southeastwards, gradually becoming a dominant group of species in the Hengduan Mountains. This dispersal route is contrary to the previous “northwards hypothesis” of this section, and further supports the hypothesis of an East Asian origin for Quercus section Ilex Loudon.
SU Tao
This data including the GDGTs data and fatty acid data records of Xiada Co in the west of Qinghai Tibet Plateau during the past 2000 years. These data are obtained by the research team using organic geochemical methods. The Xiada Co sediment core was collected in the summer of 2014. The water depth of the sampling point (33.392°N、79.363°E，4373m) is about 19m. The extraction of biomarkers in lake sediments was carried out by ultrasonic extraction. The extraction and testing of compounds were carried out in the laboratory of environmental change and surface processes, Institute of Qinghai Tibet Plateau, Chinese Academy of Sciences. The detection instrument of wax fatty acid compounds in sediments is gas chromatography flame ion detector (GC-FID, model: Agilent 7890a). The test instrument for GDGTs compounds is HPLC-APCI-MS (Agilent 1200 HPLC + 6100 MS), which is tested by three chromatographic columns in series. The model of chromatographic column is (hypersil gold silica, 100 mm) × 2.1 mm, 1.9 μ m). 5-methyl bgdgts isomer and 6-methyl bgdgts isomer were effectively separated by silica gel column in series. This data can provide the climatic and environmental background of human activities in the western plateau of the late Holocene, provide a basis for understanding the process and mechanism of climate change in the western Qinghai Tibet Plateau in the past 2000, and provide boundary conditions for climate simulation.
HOU Juzhi, LI Xiumei
The Cenozoic terrestrial chemical weathering records from the surrounding areas of the Tibetan Plateau are of great significance for understanding the relationship between Tibetan Plateau uplift, chemical weathering and global cooling. In this study, detailed mineralogical and geochemical analysis were performed on the early Cenozoic sediments from the Hongliugou section (54-26 Ma) in the Qaidam Basin, the Xiejia section in the Xining Basin (52-26 Ma) and the Caijiachong section in the Qujing Basin (46.6-36 Ma). Then a comprehensive chemical weathering history of the Early Cenozoic (54-26 Ma) in the northeastern and southeastern Tibetan Plateau was established. Specially, clay minerals of 315 samples from the Hongliugou section, 131 samples from the Xiejia section and 230 samples from the Caijiachong section were analyzed using Bruker D8+ X-ray diffraction analyzer. Major and trace elements of 310 samples from the Hongliugou section, 120 samples from Xiejia section and 201 samples from the Caijiachong section were analyzed using inductively coupled plasma optical emission spectrometry (ICP-OES; Leeman Labs Prodigy-H) and inductively coupled plasma mass spectrometry (ICP-MS; X-7; Thermo-Elemental, USA), respectively. While the hematite content of 835 samples from the Hongliugou section were determined using a Purkinje General TU1901 UV-VIS spectrophotometer. The regional chemical weathering intensity as suggested by clay mineral assemblage (i.e. (illite/smectite mixed layers + smectite)/illite), elemental geochemical indices (e.g., CIA) and hematite content shows a long-term decreasing trend in 54-26Ma, resembling the contemporary benthic oxygen isotopes variations, thus indicating that global temperature is the main controlling factor regulating the reginal chemical weathering in the early Cenozoic.
FANG Xiaomin , FANG Xiaomin, HAN Wenxia HAN Wenxia
This is Tibet Plateau (TP) annual near-surface temperature dataset during the past millennium with a 2° spatial resolution, which is produced using the paleoclimate data assimilation approach with EnSRF method, MPI-ESM-P model and 396 multi-proxies from the PAGES2k Consoritum. This dataset agrees well with several observational temperature datasets during the instrumental period, and has a similar level of reliability as the Twentieth Century Reanalysis which assimilates surface pressure observations. In addition, the dataset shows a high level of agreement with previous proxy-based reconstructions (average correlation of annual mean TP temperatures is r = 0.61). The dataset can be used to study the temperature variability over the TP and some regions of the TP during the past millennium (1000-2000 AD).
FANG Miao
Zijunbu site is an ancient human activity site about 120000 ~ 90000 years ago. There are a large number of stone tools and animal bones. The photoluminescence dating shows that the human activity time is the mis5 stage between 120-90ka. It is the earliest wilderness site on the Qinghai Tibet Plateau. The section of the site is divided into 11 layers from top to bottom, of which the cultural layer is the ancient soil layer of 6-9 layers. The Paleoenvironment was reconstructed by particle size analysis, magnetic susceptibility, total organic (TOC) and calcium carbonate content. Compared with the published high-resolution climate curve, the results show that the East Asian summer monsoon was strengthened in the period occupied by paleohumans, and the climate was warm and humid, which was conducive to human survival.
ZHANG Dongju
Fossils of the ursid Indarctos from Withlacoochee River 4A of Florida (late early Hemphillian North American Land Mammal Age, Hh2, ~ 7.5–6.5 Ma) represent the best sample of this genus in North America, including both craniodental and postcranial specimens, yet only the skull has been described. In this study, we describe the other material of this bear from the same locality and review the records of Indarctos in North America. Indarctos from Withlacoochee River 4A has dental characters in accordance with those of typical Indarctos oregonensis, but has distinctly more slender postcranial bones. Indarctos from other localities of North America contains two morphs with regards to postcranial robustness, but lacks a clear geographic pattern. Indarctos from Withlacoochee River 4A shares traits with the Old World Indarctos zdanskyi and may be its descendant in the New World. The machairodont from Withlacoochee River 4A shows typical characters (e.g., presence of distinct P4 preparastyle and mandibular flange) that allow referral to Amphimachairodus rather than to Nimravides. Its morphology also shows a stronger affinity of this population to the Old World Amphimachairodus horribilis rather than to Hh3 Amphimachairodus coloradensis. Previously, most North American records of Amphimachairodus were late Hemphillian (Hh3–4, ~ 6.5–4.5 Ma), when it co-occurred with a different ursid, “Agriotherium.” The Withlacoochee River 4A specimens provide evidence that Amphimachairodus dispersed from Asia during the Hh2. The special morphology of Indarctos and the presence of Amphimachairodus in a Hh2 fauna suggest that the environment had begun to change before the significant fauna turnover between the early and late Hemphillian.
QIGAO Jiangzuo
By collecting the tree ring width data in the Qilian Mountain and its surrounding areas, a regional tree ring chronological network is established. On this basis, the variability of Standardized Precipitation Evapotranspiration Index (SPEI) in the Qilian mountain area from May to August in recent 200 years is reconstructed by using the point by point reconstruction method, and the spatial resolution of the reconstruction is 0.5 * 0.5 degrees. All the data contained in this data set have passed the tests commonly used in tree ring climatology research, such as error reduction (RE), efficiency coefficient (CE) and correlation coefficient. The data can be used to analyze the temporal and spatial variation of drought in Qilian Mountain and its surrounding areas in the past 200 years.
DENG Yang
The cranial appendage (headgear) is an iconic structure of modern ruminants, and four of the five extant pecoran families display morphological and physiological specialties. They probably share one origin from the same genetic basis, whereas the evolution of the cranial appendages is still debatable, especially in consideration of fossil taxa lacking headgear. Amphimoschus is an enigmatic pecoran that comprises no more than two species, mainly known from the late early/early middle Miocene of Western and Central Europe and considered not to possess any cranial appendages. Here, we present Amphimoschus xishuiensis sp. nov., discovered in the Tabenbuluk area, Gansu Province, China. The new species reveals the first evidence of cranial ornamentations in the genus, including a supraorbital bump, an antorbital protuberance and frontal thickening. In our phylogenetic analysis the genus was inferred as a basal member of the Bovoidea, and thus the cranial ornamentations of A. xishuiensis might provide insight into the early evolution of cranial appendages in Bovoidea. They could be interpreted as weapons to defend territories in intense intraspecific or interspecific competition during the late early Miocene.
DENG Tao
Owing to the scarcity of records, the Asian evolution and migration of Diaceratherium, a large extinct genus of rhinoceros of the Teleoceratini, remain unclear. The skeleton described herein, from the early Miocene Shanwang Basin in China, is identified as Diaceratherium shanwangense, a species originally defined based on upper cheek teeth. This skeleton features a large body, short horn-bearing nasal bones, moderately retracted nasal notch at the P3 level, and the metapodials that are less massive than those in other previously identified species of Diaceratherium. Mammalian fossils reported from the Oligocene–Miocene transition of the Old World, such as Dorcatherium and Amphicyon, have indicated a migration route between Europe and Eastern Asia via Southern and South-eastern Asia, namely along the southern margins of the Tibetan Plateau. However, the fossil remains of Diaceratherium reported in this study were discovered in eastern China, which represents the second accurate record of the genus in Asia (together with its presence in Kazakhstan). Consequently, given the temporal range and geological distribution of Diaceratherium, we propose that the expansion of this genus to the eastern part of the continent occurred via a route following the northern margins of the Tibetan Plateau, which if verified, represents an alternative expansion route differing from the established routes of other mammals.
DENG Tao
As one of the largest land mammals, the origin and evolution of the giant rhino Paraceratherium bugtiense in Pakistan have been unclear. We report a new species Paraceratherium linxiaense sp. nov. from northwestern China with an age of 26.5 Ma. Morphology and phylogeny reveal that P. linxiaense is the highly derived species of the genus Paraceratherium, and its clade with P. lepidum has a tight relationship to P. bugtiense. Based on the paleogeographical literature, P. bugtiense represents a range expansion of Paraceratherium from Central Asia via the Tibetan region. By the late Oligocene, P. lepidum and P. linxiaense were found in the north side of the Tibetan Plateau. The Tibetan region likely hosted some areas with low elevation, possibly under 2000 m during Oligocene, and the lineage of giant rhinos could have dispersed freely along the eastern coast of the Tethys Ocean and perhaps through some lowlands of this region.
DENG Tao
Focusing on the "Holocene temperature problem", the Holocene earth temperature change has become a hot issue in the past climate change research. Based on the fossil sporopollen of Xingyun Lake in Yunnan Province, the newly developed method of quantitative reconstruction significance test based on random data is used to quantitatively reconstruct the summer temperature (average temperature in July) in the study area since the past 14000 years. It is found that there is a difference in the change trend between it and the summer precipitation records based on carbon, acid and oxygen isotopes of sediments in the lake, which is mainly reflected in the uncoupled change of the two in the early Holocene, The early Holocene had higher summer precipitation, but lower summer temperature. The author further puts forward that the internal feedback of the earth system dominated by clouds, aerosols and high latitude ice sheet boundary conditions in the northern hemisphere is the main reason for the uncoupling of early Holocene summer precipitation and temperature in Southwest China.
WU Duo
The present data are chronological and palynological data from the Luanhaizi Lake core in the Menyuan Basin, northeastern Tibetan Plateau. We used the AMS14C method to test nine dated samples from the LHZ18 core. Bulk samples were collected from plant remains and organic-rich horizons from the core LHZ18 for accelerator mass spectrometry (AMS)14C dating. Samples were measured at Beta Labs in the USA and Lanzhou University.Pollen analysis was completed at the Key Laboratory of Western China’s Environment Systems,Ministry of Education, Lanzhou University, with 140 stratigraphic pollen samples and 10 topsoil pollen samples. Spore pollen identification statistics were carried out under a light microscope.The pollen results mainly include the number of grains of trees, shrubs, herbs and aquatic plants.
HUANG Xiaozhong, ZHANG Jun, WANG Tao
Guided by the theories of plate tectonics, paleogeography, petroliferous basin analysis and sedimentary basin dynamics, a large number of data and achievements of geological research and oil and gas geological research in the pan third pole in recent years are collected, including basic materials such as strata, sedimentation, paleontology, paleogeography, paleoenvironment, paleoclimate, structure, oil and gas (potassium salt) geology, especially paleomagnetism Based on the data of paleontology, detrital zircon and geochemistry, combined with the results of typical measured stratigraphic sections, the Cenozoic lithofacies and climate paleogeographic pattern are restored and reconstructed, and the pan tertiary Cenozoic lithofacies paleogeographic map (1) and pan tertiary Cenozoic climate paleogeographic map (3) are obtained, in order to explore the impact of paleogeography, paleostructure and paleoclimate on oil and gas Control and influence of (including potassium salt) resources, so as to reveal the geological conditions of oil and gas formation and the law of resource distribution, and provide scientific basis and technical support for China's overseas and domestic oil and gas exploration deployment.
LI Yalin
Collision between the Indian and Eurasian plates produced concomitant uplift of the Tibetan Plateau and its basin-ridge geomorphological systems. Surface relief of the Tibetan Plateau has significant dynamic and thermal effects on atmospheric circulation and on regional and global climate. It has been considered as one of the key drivers for the formation of the Asian monsoon, enhanced erosion and weathering, global decreased CO2 during the Cenozoic. Finally, this uplift caused global cooling in the Cenozoic. However, at present, the driving mechanisms of these processes still remain controversies and have not been clearly confirmed by records of chemical weathering from the Tibetan Plateau. This dataset includes major elemental compositions of the Fenghuoshan Group (thick of ~4500 m) from the Hoh Xil Basin which has been dated back to the Late Cretaceous-Eocence. Element was measured in the Institute of Geology and Geophysics, Chinese Academy of Sciences using XRF-1500. The resconstructed Paleogene chemical weathering sequences allow us to constrain the trends of chemical weathering history of the studied area. We found that intensity of chemical weathering is well correlated with global temperature change. These results provide further data supprot for discussing the dynamic mechanisms and links among the Paleogene chemical weathering in the Hoh Xil Basin, uplift of the Tibetan Plateau, and global change.
JIN Chunsheng
A 170-cm-long sediment core was extracted from Lake Xingxinghai at a water depth of 9 m (34°50.44′N, 98°06.34′E) in January 2010 using Austria’s UWITEC platform coring equipment. Both the 210Pb/137Cs and AMS 14C (11 dating data) approaches were applicated into the age-depth model establishment using Bayesian age–depth modelling by the “Bacon” software, and the age-depth model indicates the core covers the past 7400 years. The core was sliced at 0.5-cm interval upper 3 cm and 1-cm interval for other part, finally we got 173 samples totally. Pollen grains were extracted using a procedure including the treatments with 10 % HCl, 10 % NaOH and 40 % HF, followed by a 7-μm mesh sieving and acetolysis treatment (9:1 mixture of acetic anhydride and sulfuric acid). Pollen grains were identified and counted under optical microscope, and at least 300 terrestrial pollen grains were counted for each sample. The mean temporal resolution of pollen spectra is ca. 40 year/sample. The pollen spectra include forty-eight pollen taxa, are dominated by herbaceous taxa (range: 88.5~98.9%; mean: 93.4%), such as Artemisia (up to 54.4%), Cyperaceae (up to 50.1%), Poaceae (up to 48.8%), Chenopodiaceae (up to 17.9%) and Asteraceae (up to 8.5%). Abundance of arboreal pollen is less than 5% through out the core, mainly comprised of Pinus (maximum: 4.9%; mean:1.2%) and Betula (maximum: 3.0%; mean: 0.7%). The pollen dataset includes pollen percentages for the 43 terrestrial pollen taxa together with their depths and ages, and the dataset is valuable to employed in past vegetation and climate reconstructions.
TIAN Fang, CAO Xianyong
This data is the set of surface dust properties in high mountain and canyon area of Hengduan Mountain, including magnetic data and geochemical data. The analysis of magnetic susceptibility and geochemical elements was completed at the Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, China. The magnetic susceptibility was measured by Bartington MS2 magnetic susceptibility meter. The geochemical elements were measured by PW2403 X-ray fluorescence spectrometer (XRF) produced by Philips in the Netherlands. This data provides the characteristics of magnetic susceptibility and geochemical elements of topsoil in the eastern Tibetan Plateau, which plays an important role in understanding the relationship between modern climate factors and magnetic susceptibility of topsoil in the eastern TP, and the source of dust source area, dust transport and atmospheric circulation model in the TP.
YANG Shengli, LI Qiong, XIA Dunsheng, LUO Yuanlong
This data is the chronological, magnetic and grain size data of Maquqiao (MQQ) aeolian sequence in the eastern Tibetan Plateau (TP). We measured the magnetic susceptibility and grain size data of the profile at 2.5 cm intervals. AMS14C dating samples were tested in Peking University and Beta Analytic in Miami, United States. All the experimental analysis was completed at the Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, China. The OSL ages were determined by an automated Risø TL/OSL DA-20 reader. The magnetic susceptibility was measured by Bartington MS2 magnetic susceptibility meter; The grain size data were measured by a Malvern Mastersizer 2000 laser diffractometer; The bulk density data were determined by according to the oil-soaked method; The data show the variations of magnetic susceptibility and grain size of aeolian sequences in the eastern TP since the Holocene, which has important reference significance for the study of aeolian sand activities associated with desertification and serious land degradation in the eastern TP.
YANG Shengli, LI Qiong, CHEN Zixuan, LIU Xiaojing
This data is the magnetism, grain size, chromaticity, diffuse reflectance spectral goethite / hematite peak height data, organic matter stable carbon isotope data of loess-paleosol sequence in Ganzi section (XS) in the east of Tibetan Plateau (TP). We measured the magnetic susceptibility and grain size of the section (10 m) at an interval of 2.5 cm, measured the non-hysteresis remanence and isothermal remanence data at an interval of 5 cm, and provided 5 sets of hysteresis loop measurement results. Total organic carbon (TOC) and organic carbon isotopes were measured at 10 cm and 20 cm intervals respectively. The experimental analysis of magnetic susceptibility was completed at the Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, China. The soil δ13Corgmeasurements were conducted at the State Key Laboratory of Grassland Agro-ecosystems (SKLGAE), Lanzhou University. And the analysis of remanence and hysteresis loop was completed at the Institute of Tibetan Plateau Research, Chinese Academy of Sciences. Chromaticity analysis was carried out in the State Key Laboratory of Loess and Quaternary Geology. The magnetic susceptibility is measured by Bartington MS2 magnetic susceptibility meter, the non-hysteresis remanence is measured by American ASCIM-10-30 pulse magnetometer and molspin minispin small rotation magnetometer, and the isothermal remanence is measured by ASCIM-10-30 pulse magnetometer, 2g-755 superconducting magnetometer and JR-6A rotation magnetometer; he grain size data were measured by a Malvern Mastersizer 2000 laser diffractometer; The chromaticity was determined by CM-700d spectrophotometer. The δ13Corgvalues were analyzed using a MAT-253 isotope ratio mass spectrometer. This data provides an understanding of the magnetic properties and chromaticity variation characteristics of the loess sequence in the eastern TP since the last interglacial period, and plays an important role in the research of the paleoenvironment and paleoclimate in the eastern TP and its relationship with the surrounding atmospheric circulation.
YANG Shengli, CHEN Zixuan, XIA Dunsheng, LIU Li
This data is the chronological, magnetic, grain size and bulk density data of Zhouqu (ZQ) loess paleosol sequence in the eastern Tibetan Plateau (TP). We measured the magnetic susceptibility, grain size and bulk density data of the profile at 5 cm intervals. All the experimental analysis was completed at the Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, China. The OSL ages were determined by an automated Risø TL/OSL DA-20 reader. The magnetic susceptibility was measured by Bartington MS2 magnetic susceptibility meter; The grain size data were measured by a Malvern Mastersizer 2000 laser diffractometer; The bulk density data were determined by according to the oil-soaked method; The data set show the variation characteristics of magnetic susceptibility, grain size and bulk density of loess sequence in the eastern TP since the last glacial period, which plays an important role in studying the paleoenvironment, paleoclimate, dust accumulation history and its relationship with the surrounding atmospheric circulation in the eastern TP.
YANG Shengli, XIA Dunsheng, CHEN Zixuan, LI Qiong
This data is the chronological, grain size and bulk density data of loess-paleosol sequence in Wenchuan (WCH) in the eastern Tibetan Plateau. We measured the median grain size and bulk density data of the profile (10m) at intervals of 2.5cm and 5cm respectively. The OSL dating experiment was carried out in the Luminescence Dating Laboratory of the Key Laboratory of Western China’s Environmental Systems (Ministry of Education) in Lanzhou University. AMS 14C measurements were carried out at Peking University. The experimental analysis of environmental indicators was also completed at the Key Laboratory of Western China’s Environmental Systems (Ministry of Education) in Lanzhou University. The OSL ages were determined by an automated Risø TL/OSL DA-20 reader. The grain size data were measured by a Malvern Mastersizer 2000 laser diffractometer; the bulk density data were determined by the oil-soaked method. This data provides the detailed chronological data of loess-paleosol sequence and the variation characteristics of grain size and bulk density since the last glacial period in the eastern Tibetan Plateau, and provides an important data reference for understanding paleoclimate evolution and dust accumulation history in the eastern Tibetan Plateau.
YANG Shengli, LIU Li, XIA Dunsheng, CHEN Zixuan
The water vapor isotopes transported by different atmospheric circulation systems are different, and the precipitation on the Qinghai Tibet Plateau is affected by monsoon and westerly circulation, which is very sensitive to climate and environmental change. Hydrogen isotopes of wax in lake sediments provide a means to restore past precipitation information. The stable hydrogen isotope records of sediments from different lakes (Qinghai Lake, linggecuo lake and Bangong Lake) in the East and west of the Qinghai Tibet Plateau provided by the author reconstruct the isotopic changes of precipitation in the East and west of the Qinghai Tibet Plateau in the past 20000 years, and study the effects of summer monsoon and westerly jet on water vapor in the Qinghai Tibet Plateau since the late Pleistocene, It also provides important basic data for reconstructing the paleoclimate and environmental changes of the Qinghai Tibet Plateau in the past.
HOU Juzhi
XRF data can quickly, nondestructive and high-resolution obtain the relative abundance of constant and trace geochemistry, which can be used to reconstruct the environmental change. This data includes the XRF multi-element data of Daze Co and Jiang Co and the age depth data of Lake cores, which can be used to reconstruct the climate and environmental changes in the East and west of the Qinghai Tibet Plateau in the past 20000 years. In Daze Co and Jiang Co lakes, Ti, K, Fe, Si and other elements show the same change trend. Through multi index comparative analysis, it is considered that Ti and other rock forming elements are mainly affected by the inner diameter flow conditions of the basin and can be used to reconstruct the changes of hydrological conditions in the basin in recent 20000 years.
HOU Juzhi
1) The data include the temperature records reconstructed by using the core depth, age and biomarker gdgts of Bangong Lake to reconstruct the annual average temperature change of Bangong Lake Basin in the west of Qinghai Tibet Plateau since the last deglaciation. At present, most paleoclimate records on the plateau are qualitative and semi quantitative, and the quantitative records are very limited, which restricts the in-depth understanding of the mechanism of climate change on the plateau. Bangongcuo, the largest lake in the west of Qinghai Tibet Plateau, was selected as the study area, and the average annual temperature change in this area since 16 ka BP was reconstructed by using biomarker indexes. 2) The record was reconstructed using gdgts of lake sediments. 3) The data are detailed and reliable. 4) This study not only provides data for understanding the past climate change in the western Qinghai Tibet Plateau, but also provides a basis for discussing the plateau climate change mechanism and verifying the reliability of regional climate model.
HOU Juzhi, WANG Mingda
1) The data includes 40 14C dating data of multiple Lake cores. The age control of most lake sediment cores is completed by radiocarbon isotope (14C) dating. The data sheet includes Lake core sample number, laboratory sample number, sample depth, 14C results, dating error and corrected results. The chronological framework of Lake cores is the basis for paleoclimate reconstruction. 2) All 14C data are completed in beta analytical Inc, and the laboratory operation is in strict accordance with the standard process. 3) The quality of the 40 dating data is good. 4) The data have been published, which provides basic data for the study of paleoclimate in the Qinghai Tibet Plateau.
HOU Juzhi
Simao basin is located in the south of Yunnan Province and the southeast of Qinghai Tibet Plateau. It belongs to the Sanjiang tectonic domain in the east of Tethys tectonic domain. Thick and continuous early Cenozoic strata are preserved in the basin, so it is an ideal material to restore the tectonic evolution history of the region and the southeast side of the plateau. a continuous and complete high-resolution sequence (361.86 m in thickness) of the Mengyejing Formation was obtained through the continuous drilling in the previous study. The mass-specific magnetic susceptibility, anhysteretic remanent magnetization, and saturation isothermal remanent magnetization from parts of samples of Xiaojinggu core (250 m) have been measured, and several important magnetic parameters were determined, including the high and low-frequency magnetic susceptibility (χlf), SIRM, and ARM. These records will provide an important insight into the paleoclimate change covering the Mengyejing Formation.
YAN Maodu
Qujing basin, located in the east of Yunnan Province, is a long and narrow faulted basin with a north-south trend. Thick and continuous Cenozoic sediments are preserved in the basin, which can be divided into Xiaotun Formation, Caijiachong Formation, and Ciying Formation from bottom to top. These sediments are ideal materials to explore the southeast escape and deformation affected by the India-Eurasian plate collision in the early Cenozoic and the formation and evolution history of the Indian monsoon. A total of a 320.1-meter core covering the entire Ciying Formation and the Caijiachong Formation was obtained through the continuous drilling mission carried out in the center of the basin in the previous study. The mass-specific magnetic susceptibility, anhysteretic remanent magnetization (ARM), and saturation isothermal remanent magnetization (SIRM) from parts of samples of Caijiachong core (320.1m) have been measured, and several important magnetic parameters were determined, including the high and low-frequency magnetic susceptibility (χlf), SIRM and ARM, thus providing important basic information for further mult-index climate reconstruction.
YAN Maodu
The Himalayas is the most majestic, tall and young folded mountain system on earth. Before Eocene, the Himalayas were in a long-term sinking shallow sea environment. Under the action of extremely strong Himalayan movement, the Himalayas rose from the sea. By the end of tertiary, it had risen to a high mountain with an average height of more than 3000 meters. Therefore, under the influence of global climate change, Mount Everest has experienced several major Pleistocene glaciations, leaving behind various glacial related sediments and interglacial deposits. In 1960, the scientific investigation team of the Chinese Everest mountaineering team and the scientific investigation team of the Chinese xishabangma mountaineering team in 1964 conducted a more detailed investigation on the glaciers and other Quaternary sediments in the two peaks and their adjacent areas. During the scientific investigation of Mount Qomolangma from 1966 to 1968, on the basis of previous work, the Quaternary glacial deposits characteristic of this area were further investigated, and the research on various deposits in interglacial period and post glacial period was strengthened, so as to find some complete and typical quaternary stratigraphic profiles. This data set comes from the field investigation of the scientific research team in this book. Outline This paper introduces the spatial distribution characteristics of Quaternary sediments, focuses on several main quaternary stratigraphic profiles, preliminarily establishes the sequence of Quaternary strata in this area and discusses the age of strata. It lays a foundation for in-depth discussion of Quaternary glaciation, paleoclimate and the rise of Himalayas in this area.
Tibetan Scientific Expedition of the Chinese Academy of Sciences
Based on the changes of tree ring stable oxygen isotope ratio since 1752 established in Northeast China, and based on the negative correlation between tree ring oxygen isotope ratio and summer drought index, the linear correlation equation between tree ring oxygen isotope and drought index is established, and the quantitative reconstruction of drought index from 1752 to 2015 is preliminarily completed. This result is helpful to understand the characteristics of regional dry and wet change from interannual to interdecadal scale. At the same time, it can also compare and study the impact of global change caused by human activities on regional hydrology and climate since the industrial revolution. It is of certain significance in revealing the mechanism of regional dry and wet change and distinguishing the impact of human activities and natural variability on regional climate.
XU Chenxi
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