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
Sediment ancient DNA is biological ancient DNA scattered in Paleoenvironmental samples, which is different from ancient DNA directly extracted from ancient animal bones and plant remains. Paleoenvironmental DNA is mainly mixed with multi species ancient DNA extracted from environmental samples such as glaciers, frozen soil, lake sediments, peat sediments, site cultural layer, dental calculus and fecal fossils. These DNA enter the environment with biological residues (including remains, hair, feces and urine), degrade rapidly and denature slowly in the environment, and finally adsorb on minerals and other particles or integrate into their own genome by microorganisms for long-term preservation, thus forming paleoenvironmental DNA. Sediment DNA is a new ancient DNA analysis technology. The sediments of archaeological sites can track the DNA preservation status of relevant sites and possible humans, make up for the shortcomings that human fossils are generally available but not available, greatly expand the research object and open a new window to study the population evolution of Paleolithic archaeological sites. The ancient DNA of stratum sediments from baishiya karst cave site where Xiahe human mandible was found was systematically sampled and analyzed.
ZHANG Dongju , FU Qiaomei
The alpine and anoxic environment of the Qinghai Tibet Plateau is a major challenge for human survival and life. When human beings boarded the Qinghai Tibet Plateau and adapted to the extreme environment of the plateau has always been a hot issue in the academic circles. At present, in the study of prehistoric culture of the Qinghai Tibet Plateau, except the northeast, most areas of the Qinghai Tibet Plateau have not established archaeological cultural sequences. Yajiang river basin is one of the areas with dense distribution of human activity relics, but there are few archaeological excavations and studies, and the activity history of the ancients in this area is not clear. Based on the systematic dating of cultural archaeological sites in Linzhi Area, Southeast Tibet, 33 carbon fourteenth age data were obtained.
YANG Xiaoyan, WANG Yanren
The Tibetan Plateau has a harsh conditions for human to inhabit. When human beings went into the Tibetan Plateau and how they adapt to the extreme environment have attract broad attention. At present, extensive studies on this issue have been conducted in the northeastern Tibetan Plateau with few work in other regions. There are a lot of archaeological sites in the Yarlung Zangbo River Basin while most of them are lack of cultural layers. Systematic archaeological investigations had been done to 25 cultural layers and 3 tombs in Lhasa and Nyignchi
YANG Xiaoyan, WANG Yanren
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
Based on the changes of tree ring stable oxygen isotope ratio Since 1750 established in Qilian mountain area, 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 1750 to 2016 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
Through the changes of tree ring stable oxygen isotope ratio since 1710 established in Bosnia area, 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 1710 to 2019 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
This data set consists of tree ring carbon and oxygen data in southern Serbia in westerly region. Tree rings in southern Serbia include 4 tree cores, the tree species is Bosnia pine, and the measured isotopic data is 967. Cellulose was extracted from tree ring logs by chemical treatment, and the obtained cellulose samples were wrapped in a silver cup. The isotopic ratio was measured by Delta V advantage stable isotope mass spectrometer, and the analysis error was less than 0.21 ‰. The experimental analysis was completed in the laboratory of soil structure and minerals, Institute of Geology and Geophysics, Chinese Academy of Sciences. This data has certain significance for the study of paleoclimate in westerly area.
XU Chenxi
This data set consists of tree ring carbon and oxygen data in central Serbia in westerly region. The tree rings in central Serbia include two tree cores (C50 and C58), the tree species is Bosnia pine, and the measured isotopic data are 542. Cellulose was extracted from tree ring logs by chemical treatment, and the obtained cellulose samples were wrapped in a silver cup. The isotopic ratio was measured by Delta V advantage stable isotope mass spectrometer, and the analysis error was less than 0.21 ‰. The experimental analysis was completed in the laboratory of soil structure and minerals, Institute of Geology and Geophysics, Chinese Academy of Sciences. The climate type of Serbia is single. As shown in the thumbnail, the oxygen isotope sequences of tree rings (C50 and C58) in central Serbia and southern Serbia (H01, H02, H05 and H08) are highly correlated. Therefore, the carbon and oxygen isotope data sets of tree rings in central and southern Serbia (a total of 6 tree cores) are of certain significance for the study of Serbian paleoclimate in westerly region.
XU Chenxi
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