The Second Tibetan Plateau Scientific Expedition (STEP) program

Brief Introduction: Second Tibetan Plateau Scientific Expedition Program

Number of Datasets: 694

  • Microbial amplicon sequencing dataset for glacial ice and snow on the Tibetan Plateau (V1.0) (2016-2020)

    Microbial amplicon sequencing dataset for glacial ice and snow on the Tibetan Plateau (V1.0) (2016-2020)

    The dataset contains microbial amplicon sequencing data from a total of 269 ice samples collected from 15 glaciers on the Tibetan Plateau from November 2016 to August 2020, including 24K Glacier (24K), Dongkemadi Glacier (DKMD), Dunde Glacier (DD), Jiemayangzong Glacier (JMYZ), Kuoqionggangri Glacier (KQGR), Laigu Glacier (LG), Palung 4 Glacier (PL4), Qiangtang 1 Glacier (QT), Qiangyong Glacier (QY), Quma Glacier (QM), Tanggula Glacier (TGL), Xiagangjiang Glacier (XGJ), Yala Glacier (YA), Zepugou Glacier (ZPG), ZhufengDongrongbu Glacier (ZF). The sampling areas ranged in latitude and longitude from 28.020°N to 38.100°N and 86.28°E to 95.651°E. The 16s rRNA gene was amplified by polymerase chain reaction (PCR) using 515F/907R (or 515F/806R) primers and sequenced with the Illumina Hiseq2500 sequencing platform to obtain raw data. The selected primer sequences were "515F_GTGYCAGCMGCCGCGGTAA; 907R_CCGTCAATTCMTTTRAGTTT" "515F_GTGCCAGCMGCCGCGG; 806R_ GGACTACHVGGGTWTCTAAT". The uploaded data include: sample number, sample description, sampling time, latitude and longitude coordinates, sample type, sequencing target, sequencing fragment, sequencing primer, sequencing platform, data format and other basic information. The sequencing data are stored in sequence file data format forward *.1.fq.gz and reverse *.2.fq.gz compressed files.

    2022-07-22 31 0

  • Plant diversity and distribution data of grid chnz016 in Qinghai Tibet Plateau (2022)

    Plant diversity and distribution data of grid chnz016 in Qinghai Tibet Plateau (2022)

    This data is the plant diversity and distribution data of chnz016 grid on Qinghai Tibet Plateau, including the Chinese name, Latin name, latitude and longitude, altitude, collection number, number of molecular materials, number of specimens, administrative division, small place, collector, collection time and creator of plants in this grid. The data is obtained from e scientific research website( http://ekk.kib.ac.cn/web/index/#/ )And partially complete the identification. This data has covered the list and specific distribution information of all plants in this flora. This data can be used not only to study the floristic nature of this region, but also to explore the horizontal and vertical gradient pattern of plants in this region.

    2022-07-10 994 18

  • U-Pb and Ar-Ar geochronological data of the northern Tugeman lithium-beryllium deposit in the middle of Altyn Tagh

    U-Pb and Ar-Ar geochronological data of the northern Tugeman lithium-beryllium deposit in the middle of Altyn Tagh

    The data include isotopic dating data of zircon, cassiterite, coltan and muscovite. The samples were collected from pegmatite in the northern Tugemanbei Li-Be deposit, middle Altyn Tagh. U-Pb dating data of zircon, cassiterite, and niobate tantalite were obtained by laser ablation inductively coupled plasma mass spectrometer. Among them, zircon U-Pb isotopic dating was completed in Wuhan Samplesolution Analysis Technology Co., Ltd., cassiterite U-Pb isotopic dating was completed in the Tianjin Center, China Geological Survey, and coltan U-Pb isotopic dating was completed in the State Key Laboratory for Mineral Deposits Research, Nanjing University. The Ar-Ar radioisotope dating of muscovite was completed in Beijing Research Insitute of Uranium Geology, and the data were obtained by noble gas mass spectrometer. The age of pegmatite can be determined by the obtained data.

    2022-07-06 917 186

  • Types of surface vegetation within 500m of China Pakistan Economic Corridor and Tianshan Mountains (2020)

    Types of surface vegetation within 500m of China Pakistan Economic Corridor and Tianshan Mountains (2020)

    This data set collates and collects the surface vegetation type data with 500m spatial resolution in the Qinghai Tibet Plateau and its surrounding areas. The data source is from the official website of the United States Geological Survey (USGS)( https://lpdaac.usgs.gov/products/mod12q1v006/ )This data is the land use and cover product of MODIS level III data, with a spatial resolution of 500m. By using supervised classification of Terra and aqua reflectance data. By applying smoothing splines to the bottom bidirectional reflectance distribution function (BRDF) - adjusted reflectance (nbar) time series, the 6th mcd1201 product developed a new notch filling spectral time feature. In addition, the 6th edition also uses hidden Markov model (HMM) to reduce false changes in category labels. The data set contains 17 major land cover types, including 11 natural vegetation types, 3 land types for land development and mosaic and 3 non vegetation land type definition types according to the international geosphere biosphere program (IGBP). They are: 1-evergreen coniferous forest; 2-evergreen broad-leaved forest; 3-deciduous coniferous forest; 4-deciduous broad-leaved forest; 5-mixed forest; 6-dense shrub; 7- sparse shrub; 8- woody savanna; 9- savanna; 10- grassland; 11- permanent wetlands; 12- agricultural land; 13- cities and construction areas; 14- agricultural land / natural vegetation splicing; 15- snow and ice; 16- bare ground; 17- water.

    2022-07-01 1161 6

  • Original genome data sets of Halenia elliptica and Halenia grandiflora

    Original genome data sets of Halenia elliptica and Halenia grandiflora

    The Qinghai-Tibet Plateau and its surrounding alpine areas have bred a high degree of plant diversity, and their composition sources are complex. The Qinghai-Tibet Plateau is not only the distribution center of modern alpine plants, but also inextricably linked with plants in other areas. The plants growing in this area have unique gene resources to adapt to the plateau environment. Due to the limit of technology, the mining and utilization of plant gene resources in this area is still in its infancy. Through comparative genomics research on two species of Gentianaceae, we can analyze the genomic effect of plant mating system evolution, discover the key genes related to selfing, and explore the maintenance mechanism of plant hybrid mating system. The content of this data collection is listed as follows: the original genome data of the Halenia elliptica and the Halenia grandiflora , including the third-generation pacbio sequencing data of Halenia elliptica and the Halenia grandiflora, and the second-generation Illumina sequencing data of the Halenia elliptica and the Halenia grandiflora.

    2022-06-29 487 0

  • Geochemical data of magmatic and metamorphic rocks in Nymo area of Gangdese belt, southern Tibet

    Geochemical data of magmatic and metamorphic rocks in Nymo area of Gangdese belt, southern Tibet

    The data are the radioisotope dating data of magmatic and metamorphic rocks, the major and trace geochemical data of whole rock and the major geochemical data of minerals. Samples were collected from diorite and garnet biotite schist in Gangdese belt, Nimu area, southern Tibet. The U-Pb isotopic data of zircon and monazite were obtained by laser ablation inductively coupled plasma mass spectrometry. The major and trace geochemical data of the whole rock are obtained by X-ray fluorescence spectrometry and inductively coupled plasma mass spectrometry. The main geochemical data of minerals are obtained by EPMA. The age of regional magmatism and metamorphism can be determined by the obtained data.

    2022-06-24 898 181

  • Debris flow risk assessment in China Pakistan Economic Corridor (2021)

    Debris flow risk assessment in China Pakistan Economic Corridor (2021)

    This data is the debris flow risk assessment data, which is obtained from the analysis and research of the debris flow disaster in the China Pakistan Economic Corridor. The sample data of debris flow is the detailed data of debris flow disaster through remote sensing interpretation and on-site verification. A risk assessment system is established to evaluate the debris flow risk in the study area by using the information method, and then the risk area is divided by using the natural breakpoint method. This data can be used to assess the risk of major debris flow disasters, understand the relationship between the risk degree of major debris flow, and provide scientific guidance for the decision-making of local government departments in disaster prevention and mitigation and urban governance.

    2022-06-21 470 0

  • Distributions of debris flows in CPEC and Tianshan Mountain

    Distributions of debris flows in CPEC and Tianshan Mountain

    This data provides the distribution of debris flows in the China-Pakistan Economic Corridor and the Tianshan Mountains by 2021. Based on historical data collection, field surveys and interpretation of remote sensing images, combined with digital topographic maps (DEM) and geological maps, the latest China-Pakistan economic The debris flow distribution data of the corridor (foreign section) has good reliability of data information, and the data can be used as the basic data for debris flow distribution law, debris flow risk, and risk calculation. The extraction of the debris flow basin mainly adopts the hydrological analysis method in ArcGIS, taking into account the accuracy limitation of DEM, combined with Google Earth images to perform necessary manual correction.

    2022-06-20 224 0

  • Vulnerability assessment of debris flow in China Pakistan Economic Corridor (2021)

    Vulnerability assessment of debris flow in China Pakistan Economic Corridor (2021)

    This data is the debris flow risk assessment data obtained from the analysis and Research on the debris flow disaster in the China Pakistan Economic Corridor, and the data source is the risk and vulnerability analysis results obtained from this study; The research method is based on the risk expression given by the United Nations Department of Humanitarian Affairs (1992): risk = hazard × Vulnerability, risk analysis of debris flow disaster in the study area.. The purpose of this data is to assess the risk of debris flow disaster in the China Pakistan Economic Corridor, understand the relationship between the intensity of major debris flow risk, and provide scientific guidance for the decision-making of local government departments in disaster prevention and mitigation and urban governance.

    2022-06-20 502 0

  • Debris flow risk assessment in China Pakistan Economic Corridor (2021)

    Debris flow risk assessment in China Pakistan Economic Corridor (2021)

    This data is the debris flow risk assessment data obtained from the analysis and Research on the debris flow disaster in the China Pakistan Economic Corridor, and the data source is the risk and vulnerability analysis results obtained from this study; The research method is based on the risk expression given by the United Nations Department of Humanitarian Affairs (1992): risk = hazard × Vulnerability, risk analysis of debris flow disaster in the study area.. The purpose of this data is to assess the risk of debris flow disaster in the China Pakistan Economic Corridor, understand the relationship between the intensity of major debris flow risk, and provide scientific guidance for the decision-making of local government departments in disaster prevention and mitigation and urban governance.

    2022-06-20 549 0

  • Average annual vegetation coverage of China Pakistan Economic Corridor and Tianshan Mountains (2000-2018)

    Average annual vegetation coverage of China Pakistan Economic Corridor and Tianshan Mountains (2000-2018)

    This data uses a large number of MODIS remote sensing images to analyze and calculate the surface vegetation coverage of the Qinghai Tibet Plateau from 2000 to 2018 based on the Google Earth engine platform. Vegetation index (NDVI) is an important index for monitoring ground vegetation. The 6th edition data of Terra moderate resolution imaging spectrometer (MODIS) vegetation index level 3 product (mod13q1) are generated every 16 days with a spatial resolution of 250 meters. The annual average NDVI index calculated based on GEE platform can reflect the long-term change trend of vegetation coverage from 2000 to 2018. Meanwhile, the multi-year average NDVI index from 2000 to 2018 reflects the spatial distribution of the Qinghai Tibet Plateau. The spatial-temporal change monitoring of vegetation index (NDVI) is an indispensable basic information and key parameter for environmental change research and sustainable development planning, which is helpful to understand the changes and impacts of some ecological factors (temperature, precipitation) under the background of climate change.

    2022-06-20 170 0

  • China Pakistan Economic Corridor and main water systems of Tianshan Mountains (1989)

    China Pakistan Economic Corridor and main water systems of Tianshan Mountains (1989)

    The China Pakistan Economic Corridor and Tianshan Mountain region belong to subtropical grassland, desert climate and warm temperate continental arid climate, with less River precipitation supply. The rivers in the northern mountain area are supplied by glacial snow melt water. Located in the Indus River Basin, the upper reaches of the Indus River have developed water systems, including the main stream of the Indus River, Jhelum River and Chenab River in the west of the left bank. This data set is a water system map of the Qinghai Tibet Plateau. Water system is an important natural factor. Its development, shape and distribution are the result of the comprehensive action of many factors. The classification of rivers is based on the most typical characteristics of water systems, so the coding of water systems takes full account of the classification of water systems and other characteristics of rivers. The data of foreign rivers come from natural earth. All rivers are subject to manual smoothing and position adjustment to adapt to the shadow terrain generated by SRTM plus elevation data.

    2022-06-18 277 0

  • DEM of the China–Pakistan Economic Corridor and Tianshan Mountains (30m) (2006-2011)

    DEM of the China–Pakistan Economic Corridor and Tianshan Mountains (30m) (2006-2011)

    Topographic data of China Pakistan Economic Corridor and Tianshan Mountains are produced by Japan Aerospace Exploration Agency (JAXA). The 30m digital elevation model (DEM) (2006-2011) of China Pakistan Economic Corridor and Tianshan Mountains describes the ground elevation information, which is an important raw data for studying and analyzing terrain, watershed and feature recognition. It is widely used in surveying and mapping, hydrology, hydrology, meteorology, geomorphology, geology, soil, engineering construction and other fields of national economy as well as humanities and natural sciences. In terms of flood control and disaster reduction, DEM is the basis for hydrological analysis, such as catchment area analysis, water network analysis, rainfall analysis, flood storage calculation, inundation analysis, etc; At the same time, DEM data can reflect local terrain features with a certain resolution. Through DEM, a large amount of surface morphology information can be extracted, which can be used to draw contour lines, elevation maps, slope maps, water system maps, three-dimensional perspective maps, three-dimensional landscape maps, and used to make orthophotos, three-dimensional terrain models, and map revision. The horizontal resolution of the data is 30m (1 arc second), and the elevation accuracy is 5m. It is one of the most accurate terrain data in the world. The data download address is https://www.eorc.jaxa.jp/ALOS/en/aw3d30/data/ 。

    2022-06-18 270 10

  • Soil types of China Pakistan Economic Corridor and Tianshan Mountains (1971-1981)

    Soil types of China Pakistan Economic Corridor and Tianshan Mountains (1971-1981)

    This data set is the soil type map of China Pakistan Economic Corridor and Tianshan Mountains (1971-1981), which is derived from the world food and Agriculture Organization (FAO) harmonious world soil database (v1.2). The coverage is global, and the spatial resolution is 0.0833333 °. The soil data is the result of the cooperation between FAO and the world soil information agency, the Soil Research Institute of the Chinese Academy of Sciences and the joint research center of the European Commission. The unified world soil database is a 30 arc second grid database with more than 15000 different soil mapping units. It combines the existing soil information in the world with the information in the 1:5000000 scale world soil map (FAO, 1971-1981). The grid database consists of 21600 rows and 43200 columns, and uses a standardized structure to link attribute data with grid maps to display or query the composition of soil units and the characteristics of selected soil parameters. Soil type map can provide basic scientific reference for land use planning, geological disaster prevention and management.

    2022-06-18 168 3

  • Hydrochemical characteristics of the upper Yarlung Zangbo River in summer(2020)

    Hydrochemical characteristics of the upper Yarlung Zangbo River in summer(2020)

    To explore inorganic hydrochemical characteristics of the upper Yarlung Zangbo River, water samples were collected from the main stream and different tributaries in this region in August 2020. The water was collected with 100mL polyethylene (PE) plastic bottle, and the basic physical and chemical parameters such as pH value (±0.2) and dissolved oxygen (±1%) of the sampling site were measured by multi -parameter water quality monitor (YSI-EX02,USA).,and HCO3- concentration was titrated with 0.025mol/L HCl.The concentrations of Na+, K+, Ca2+, Mg2+, SO42-, NO3- and Cl- ions were analyzed and determined by ion chromatograph (Shenhan CIC-D160, China) in the laboratory. Using Gibbs model, correlation analysis and principal component analysis method, analyzed the one main ion concentration changes, chemical composition characteristics, analytical, and the ion source was designed to reveal inorganic water chemical characteristics of The Tibet plateau glacier melt water runoff, and for plateau typical river water and changing trend forecast provides the basis.

    2022-06-16 360 0

  • Photos and videos of the Second Tibetan Plateau Scientific Expedition and Research on conservation and sustainable utilization of microbial diversity in the plateau (2020-2021)

    Photos and videos of the Second Tibetan Plateau Scientific Expedition and Research on conservation and sustainable utilization of microbial diversity in the plateau (2020-2021)

    The Second Tibetan Plateau Scientific Expedition and Research Task V Theme III "Conservation and Sustainable Utilization of Plateau Microbial Diversity" (2019QZKK0503) carried out more than 30 field scientific expeditions in the first and second years. Footprints cover most of the Tibetan Plateau, including the investigation of glaciers (such as Qiangyong Glacier, Tanggula Glacier, Everest East Rongbu glacier, Jiemayangzong Glacier, Palung 4 Glacier, etc.), lakes, soils, fungi, lichens, animals in Southeast Tibet, Qiangtang Plateau, Cocosili and Himalayan region. The dataset contains 6,471 photos and videos, including habitat photos, working photos, and scientific images collected during the first and second years of fieldwork.

    2022-06-15 417 0

  • Hydrochemical characteristics of Naqu watershed in the upper reaches of Nujiang River (2020-2021)

    Hydrochemical characteristics of Naqu watershed in the upper reaches of Nujiang River (2020-2021)

    In order to explore the inorganic hydrochemical characteristics of Naqu basin, river water and groundwater were collected in Naqu basin in September 2020 and September 2021. Collect river water and groundwater with 550ml plastic bottles on site. The main anions and anions (ca2+, na+, mg2+, k+, so42- and cl-) are measured with an ion chromatograph (metrohm ecoic, Switzerland), with a measurement accuracy of 1 μ G/l. Bicarbonate (hco3-) is titrated with acid-base indicator and determined with 50ml acid burette. The purpose is to reveal the inorganic hydrochemical characteristics of water bodies in Naqu basin and provide data support for the analysis of groundwater recharge sources in Naqu basin.

    2022-06-15 331 0

  • Data sets of ground air exchange fluxes and vertical gradients of air pollutants at Namco station (2019) and Southeast Tibet station (2021)

    Data sets of ground air exchange fluxes and vertical gradients of air pollutants at Namco station (2019) and Southeast Tibet station (2021)

    This data is obtained through observation at Namucuo multi cycle comprehensive observation and research station of Chinese Academy of Sciences (2019) and Tibetan southeast alpine environment comprehensive observation and research station of Chinese Academy of Sciences (2021), including the earth atmosphere exchange flux or vertical gradient of species such as O3, NOx, HONO, H2O and HCHO. The time range is from April 28, 2019 to July 10, 2019 (Namuco station) and from May 2, 2021 to May 13, 2021 (Southeast Tibet station). The data consists of five documents. Documents 1-4 are the flux data and H2O vertical gradient, HONO vertical gradient and NO2 vertical gradient observed at Namuco station in 2019. Document 5 is the flux data observed at Southeast Tibet station in 2021. During the monitoring period, data was missing due to instrument status problems. This data has broad application prospects and can serve graduate students and scientists with backgrounds such as atmospheric science, climatology, and ecology.

    2022-06-13 1689 5

  • Global Soil Texture Datasets Optimized from Satellite-Observed Wilting Point

    Global Soil Texture Datasets Optimized from Satellite-Observed Wilting Point

    This dataset provides global soil texture data optimized by remote sensing estimation of wilting coefficient, with a spatial resolution of 0.25 degree. The dataset incorporates remote sensing-based (e.g., SMAP satellite) estimation of soil wilting point and uses the SCE-UA algorithm to optimize two prevalently used soil texture datasets (i.e., GSDE (Shangguan et al. 2014) and HWSD (Fischer et al., 2008)). Comparison results with in-situ observations (44 stations in North America) show that, the soil moisture and evaporative fraction simulation from the Noah-MP land surface model by using the optimized soil texture have been significantly improved.

    2022-06-12 403 48

  • 90-meter resolution geological hazard risk map of the Himalayas and Asia Water Tower (2021)

    90-meter resolution geological hazard risk map of the Himalayas and Asia Water Tower (2021)

    This data set collates and collects various geological hazard points, topographic relief, landslide, elevation, land use and other influencing factors, with a resolution of 90m. The above factor layers and sample data are used to obtain the risk grade map with random forest. Data sets / atlas are mainly generated by: raw data (investigation, collection and purchase, etc.), processing data (calculation and simulation). The data source is downloaded from the open source website with an accuracy of 90m. The data is downloaded from the open source website and calculated in spider with their own random forest code. The training set is 80% and the test set is 20%. Open it with a computer that can run ArcGIS.

    2022-06-11 153 0