Normalized Difference Vegetation Index (NDVI) has been widely used for monitoring vegetation. This dataset employed all available Landsat 5/7/8 data on the Qinghai-Tibetan Plateau (QTP) (> 100,000 scenes), and reconstructed high spatiotemporal NDVI time-series data (30-m and 8-d) during 2000-2020 on the TP (QTP-NDVI30) by using the MODIS-Landsat fusion algorithm (gap filling and Savitzky–Golay filtering；GF-SG). For the details of GF-SG, please refer to Chen et al. (2021). This dataset has been evaluated carefully. The quantitative assessments show that the reconstructed NDVI images have an average MAE value of 0.02, correlation coefficient of 0.96, and SSIM value of 0.94. We compared the reconstructed images in some typical areas with the PlanetScope 3-m images and found that the spatial details were well preserved by QTP-NDVI30. The geographic coordinate system of this dataset is GCS_WGS_84. The spatial range covers the vegetation area of the QTP, which is defined as the areas with average NDVI during July- September larger than 0.15.
CAO Ruyin , XU Zichao , CHEN Yang , SHEN Miaogen , CHEN Jin
This dataset include major, trace, neodymium and strontium isotope geochemical data of 72 riverine sand samples from the Yarlung Tsangpo-Brahmaputra-Ganges river system, including 48 samples from the Yarlung Tsangpo River and its tributaries, 19 samples from the Brahmaputra River and its tributaries, and 5 samples from the Ganges River. The major elements include SiO2, Al2O3, Fe2O3 and other 7 elements from all 72 samples, expressed as percentage of oxides; trace elements include Li, Be, Sc and other 41 elements from 30 samples, expressed as parts per million (ppm); neodymium isotope data includes 143Nd/144Nd ratios and their error values from 26 samples; while strontium isotope data includes 87Sr/86Sr ratios and their error values for 26 samples. The main elements were analyzed using a PANalytical Axios X-ray fluorescence analyzer (XRF), with testing errors <3%; trace elements were tested using a Thermo Fisher VG-X7 inductively coupled plasma mass spectrometer (ICP-MS), with testing errors <5%; Nd and Sr isotopes were tested using a Thermo Fisher NEPTUNE plus multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS), with deviations of <0.005% for Sr and <0.004% for Nd isotopes relative to the reference values of the international standards. All the above laboratory tests were performed at the State Key Laboratory of Marine Geology, Tongji University. The data are of both scientific and social importance for understanding the tectonic activity, chemical weathering, and source-to-sink transport of riverine sediments in large drainage basins from the Tibetan Plateau, as well as for assessing the inter-relationship between natural processes and human activities.
LIU Zhifei , ZHAO Yulong , YU Mingyang , LIN Baozhi , ZAKIR HOSSAIN H.M, TARAL Suchana , CHAKRABORTY Tapan
The data are the detrital zircon ages of the late Cretaceous early Cenozoic strata in Sichuan Basin, Xichang Basin, Huili basin and Chuxiong Basin on the eastern margin of the Qinghai Tibet Plateau; All detrital zircon samples collected in this study are sandstone. The crushing and zircon selection of samples were completed in Langfang Chengxin Geological Service Co., Ltd; Zircon U-Pb dating was done at the State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). At least 200 zircon grains were randomly selected to adhere to double-sided adhesive, and were poured into the laser sample target with epoxy resin. All samples were ablated by using a laser beam with a diameter of 28μm, a frequency of 10 Hz and laser energy density of 4.0J/cm 2 .
ZHANG Huiping
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