The Second Tibetan Plateau Scientific Expedition (STEP) program

Brief Introduction: Second Tibetan Plateau Scientific Expedition Program

Number of Datasets: 696

  • MODIS Terra 8-days products with 500m spatial resolution over the Tibetan Plateau (2020)

    MODIS Terra 8-days products with 500m spatial resolution over the Tibetan Plateau (2020)

    The dataset includes FPAR, GPP, NPP, evapotranspiration product and LAI product. FPAR product is and LAI product are obtained from the MODIS Terra MOD15A2H dataset, GPP and NPP product are obtained from the MOD15A2H dataset and evapotranspiration product is obtained from MODIS Terra MOD16A2 dataset of 2020 over the Tibetan Plateau,which is downloaded from USGS, and their formats are converted from .hdf to .tif by GDAL.The quality assessment files are also included for aboved products,and they are stored in an efficient bit-encoded manner.The MODIS products play an important role in forest, agriculture, ecology.

    2022-05-26 291 19

  • Magnetic susceptibility and chromaticity data of Oligocene Baiyanghe Formation in the northeastern margin of the Tibetan Plateau and the southern margin of jiuxi Basin

    Magnetic susceptibility and chromaticity data of Oligocene Baiyanghe Formation in the northeastern margin of the Tibetan Plateau and the southern margin of jiuxi Basin

    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.

    2022-05-26 345 2

  • A new vegetation map for Qinghai-Tibet Plateau by integrated classification from multi-source data products(2020)

    A new vegetation map for Qinghai-Tibet Plateau by integrated classification from multi-source data products(2020)

    In this study,a vegetation classification system for the vegetation types in the Qinghai-Tibet Plateau was designed. The integrated classification method,taken into account of multi-source vegetation classification / land cover classification products, was used to produce the actual vegetation map. This integrated classification method followed the principle of data consistency,and the resultant vegetation map was superior over other vegetation maps in terms of reflection of current situation, classification system, and classification accuracy. This vegetation map is timely and could better reflect current vegetation distribution than earlier ones. This vegetation map could be conducive to fully extract vegetation information from multi-source data products with high reliability and consistency. Compared with previous data products,the overall accuracy (78.09%,kappa coefficient is 0.75) of this new vegetation map was found to increase by 18.84%-37.17%,especially for grassland and shrub.

    2022-05-25 738 205

  • Data set of DEM and orthography image on the Nyangqu River in the Yarlung Zangbo River (2021)

    Data set of DEM and orthography image on the Nyangqu River in the Yarlung Zangbo River (2021)

    The data are DEM and orthographic image data along the Nyangqu River of Yarlung Zangbo River. The camera carried by DJI UAV was used to take photos of the sampling section of Nyangqu River according to the set flight path. The overlap of adjacent photos was not less than 70%. The photos were utilized by Agisoft Metashape software to generate orthography image and DEM. Orthography image contains three bands: red, green and blue. The sampling river reaches of Nyangqu River basin contained four locations of main channel and two locations of tributaries. The resolution of the digital elevation model was less than 1.0m and the coordinate system was WGC1984. The data set can provide data support for the accurate simulation of flood disaster in the Nyangqu River, and further serve the prevention and control of flood disaster and risk assessment, which has important scientific and engineering value.

    2022-05-24 368 0

  • Health index data of some scientific research team members on the Qinghai Tibet Plateau (2019-2021)

    Health index data of some scientific research team members on the Qinghai Tibet Plateau (2019-2021)

    (1) All data are measured at the station where each scientific research route is completed each time. (2) The sample number represents the team members and data contributors participating in the scientific examination; Different numbers represent different people. (3) Systolic blood pressure, diastolic blood pressure and pulse were measured by OMRON arm electronic sphygmomanometer; The data of blood oxygen saturation (SpO2) and heart rate were measured by fish jump finger clip oximeter; All hormones were determined by Shanghai ELISA kit. (4) There are two groups of blood pressure, pulse, oxygen saturation and heart rate data in each batch; One group (in the evening) is measured after arriving at a new destination, and the other group (in the morning) is measured before arriving at a new accommodation every day for breakfast; Hormone data were measured after blood collection in some accommodation points and taken back to the laboratory for treatment. (5) When the human body enters the high altitude hypoxic environment, heart rate, oxygen saturation and blood pressure are very sensitive response indicators. Blood pressure, heart rate and oxygen saturation are important indicators to reflect the degree of hypoxia. In particular, continuous detection of subjects can show the change process of hypoxic stress and adjustment. (6) From the perspective of physiology, it is analyzed that after people face hypoxic stress, the body increases or decreases the hormone level to maintain normal life activities, so as to achieve an adaptive protective mechanism, which provides a theoretical basis for the development of hypoxic drugs in the future; The choice of traveling on the plateau has a profound impact on the development of the plateau, which is not only conducive to the development of the plateau, but also has a profound impact on the development of the plateau. Health index data of some scientific research team members on the Qinghai Tibet Plateau (2019-2021)

    2022-05-24 712 16

  • Urban and rural tourism in the Qinghai Tibet Plateau scientific research on Sichuan Tibet and Qinghai Tibet lines (2020)

    Urban and rural tourism in the Qinghai Tibet Plateau scientific research on Sichuan Tibet and Qinghai Tibet lines (2020)

    Focus on the important tourism cities and agricultural and pastoral areas relying on Sichuan Tibet and Qinghai Tibet line on the Qinghai Tibet Plateau, record and collect the image data of the current situation of node cities and villages along the line, the planning and construction of urban tourism and rural tourism, evaluate the supporting capacity of existing important node cities and villages for the construction of world tourism destinations on the Qinghai Tibet Plateau, and put forward the optimization and improvement scheme of urban and rural tourism development path and supporting cities of important nodes of world tourism destinations. The data sources are VR panoramic camera, panoramic HD vehicle recorder and digital camera. After collecting the data, the data are classified according to different collection locations. The data has been checked for many times to ensure its authenticity. It is an important part of the image database of the urban and rural tourism resource support system on the Qinghai Tibet Plateau.

    2022-05-23 166 1

  • China-Pakistan Economic Corridor and active fault zone in Tianshan Mountains (2013)

    China-Pakistan Economic Corridor and active fault zone in Tianshan Mountains (2013)

    This dataset is the China-Pakistan Economic Corridor and the active fault zone of the Tianshan Mountains (2013). The obtained geological map is a 1:2.5 million geological map, covering the China-Pakistan Economic Corridor and the Tianshan Mountains. Geological structural maps can provide a digital space platform for the informatization of the national economy, and provide information services for national and provincial departments for regional planning, geological disaster monitoring, geological surveys, prospecting and exploration, and macro decision-making. The source of the obtained geological map data is to scan the paper map first, then perform georeferencing on the ArcGIS 10.5 platform, and then obtain it by vectorization. The storage format is vector data, and the spatial granularity is divided into regions.

    2022-05-23 372 0

  • China-Pakistan Economic Corridor and geological map of Tianshan Mountains (2013)

    China-Pakistan Economic Corridor and geological map of Tianshan Mountains (2013)

    This dataset is the geological structure map of the China-Pakistan Economic Corridor and the Tianshan Mountains. The obtained geological map is a 1:2.5 million geological map, covering the China-Pakistan Economic Corridor and the Tianshan Mountains. Geological structural maps can provide a digital space platform for the informatization of the national economy, and provide information services for national and provincial departments for regional planning, geological disaster monitoring, geological surveys, prospecting and exploration, and macro decision-making. The obtained geological map data source is obtained by first scanning the paper version of the map, then performing georeferencing on the ArcGIS 10.5 platform, and then vectorizing it. The storage format is vector data, and the spatial granularity is divided into regions.

    2022-05-23 421 14

  • Data set of Element Content and Isotope in Tarim Basin, Xinjiang (9.3-10Ma)

    Data set of Element Content and Isotope in Tarim Basin, Xinjiang (9.3-10Ma)

    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.

    2022-05-23 217 74

  • Atmospheric oxidizability data set of Namco station (2019)

    Atmospheric oxidizability data set of Namco station (2019)

    1) Data content: the observation data of atmospheric oxidation related parameters in Namuco from April to July 2019, including O3, H2O, CO2, NO2, VOCs, wind direction and wind speed. The coordinates of the observation points are 90.96 ° e, 30.77 ° n, 4730m above sea level, and the underlying surface is alpine grassland. (2) Data source and processing method: the original observation data shall be processed and quality controlled by special personnel according to the observation records. (3) Data quality description: due to the problem of instrument status, the data is missing and discontinuous in some periods. (4) Application prospect of data: the data can be applied to plateau atmospheric chemical analysis and other fields.

    2022-05-21 432 0

  • Photos and images of the Himalayas and the Asian water tower area (2021)

    Photos and images of the Himalayas and the Asian water tower area (2021)

    The photos contain the disaster spots and work photos of the scientific research every day (Juue 15th, 2021-July 24 6th, 2021), and the questionnaire of each disaster spot (including landslide, collapse, debris flow, etc.). The disaster spots recorded every day are marked on the map, converted into KMZ format, and the distribution of disaster spots in the scientific research area is analyzed on GIS. The distribution of disaster points shows that rainfall-induced landslide, debirs flow and rockfall, flash flood disaster points are major located along along the eastern route and the intensity are dense in there. In addition, the transportation infrastructure and popultion are relative densely distributed along the earstern route, may be resulte in high comprehensively disaster risk.In the western route, there are major distributed sand disaster, also mass movement disasters such as landslde and rockfall. The above pictures, vedios, disaster point map and route map are recorded. The above data are intuitive data for researching scientific expeditions, also are the key input data and examine data. In addition, they are fundamental significance for objectively judging the types and distribution of disasters in the scientific expedition area, as well as disaster prevention and mitigation measures.

    2022-05-21 414 6

  • 2022-05-20 201 40

  • Stratigraphic histogram of key horizons in southern Tibet

    Stratigraphic histogram of key horizons in southern Tibet

    The Paleogene marine strata in southern Tibet are well developed and rich in foraminifera and other marine fossils. Based on the study of macroforaminifera taxonomy and Stratigraphy in the West Tethys domain (mainly the Mediterranean region), western scholars established the Paleocene Eocene macroforaminifera biostratigraphy in 1998. Compared with Tibet in the East Tethys domain, the development of macroforaminifera in the Paleocene in the Mediterranean region is relatively poor. Therefore, the accuracy of biostratigraphy based on sittis foraminifera is low. In this study, detailed profile survey and high-density sample collection of lower Paleogene carbonate sedimentary strata in guru area, southern Tibet are carried out to supplement and improve the biostratigraphy of macroforaminifera in southern Tibet on the basis of macroforaminiferal taxonomy research; Based on biostratigraphy and carbon isotope stratigraphy, a high-resolution chronostratigraphic framework is established. A total of 7 profiles were measured in this study, and the profiles are located between 89 ° 11 ′ ~ 89 ° 13 ′ E and 28 ° 3 ′ ~ 28 ° 7 ′ n; The elevation range is 4643 ~ 5380 M. Based on the observation of rock slices in the laboratory, the age of the measured strata is preliminarily judged. P2 section is a limestone sequence overlying the late Cretaceous strata, representing the earliest Paleocene sedimentation in the study area; P1 section is a set of very thick limestone deposits of lower Paleocene; Section E2 is the top of Paleocene, close to the Paleocene / Eocene boundary; The ages of sections E1, E3, E3s and E4 are roughly early Eocene; The grayish green marl and red shale at the top of section E4 represent the latest marine strata in the study area. We plan to conduct detailed taxonomic and stratigraphic studies on foraminifera in these sections to establish high-resolution large foraminifera biostratigraphy; At the same time, we also need to analyze the changes in composition and abundance of macroforaminifera, and further explore the evolution process of macroforaminifera in early Paleogene. For the sandstone strata in the section, we need to conduct detrital zircon U-Pb isotope analysis, the obtained age and biostratigraphic data confirm each other, and further explore the paleogeographic evolution process under the influence of India Eurasia collision.

    2022-05-20 302 0

  • Rules for logging of field investigation images in Qinghai-Tibet Plateau (2020)

    Rules for logging of field investigation images in Qinghai-Tibet Plateau (2020)

    Log and image are unique and important primary data of field research, and also an important part of scientific data. In order to further standardize the collection, collation, warehousing and exchange of expedition logs and image data of the second Comprehensive scientific investigation and research project on the Qinghai-Tibet Plateau, and ensure the operability, organization and standardization of the warehousing of expedition logs and image data, this technical specification is formulated. This specification provides procedures and methods for the collection and collation of investigation logs and image data, including work preparation, field investigation, data collation and other requirements, in order to better serve the storage of investigation data. This specification applies to the collation and storage of log and image data of field investigations organized by the second Comprehensive scientific investigation and research project on the Qinghai-Tibet Plateau, and other relevant data formed by field investigations can also be carried out by reference to this technical specification.

    2022-05-20 162 0

  • Standard for data convergence and quality control of geological environment and disaster risk investigation in Qinghai-Tibet Plateau (2020)

    Standard for data convergence and quality control of geological environment and disaster risk investigation in Qinghai-Tibet Plateau (2020)

    To fully implement the measures for the administration of the scientific data for the "government budget funding for formation of the scientific data shall, in accordance with the open as normal, not open for exception principle, by the competent department to organize the formulation of scientific data resources directory, the directory should be timely access to the national data sharing and data exchange platform, open to society and relevant departments to share, In the spirit of unimpeded military-civilian sharing channels for scientific data, and in accordance with the relevant requirements of relevant exchange standards and specifications, this code is now established for the second Comprehensive scientific investigation and research project on the Qinghai-Tibet Plateau. The main drafting unit of this code: Institute of Geographic Sciences and Natural Resources Research, CAS. Main draftsman of this specification: project group 9 of the second Comprehensive Scientific investigation and research Mission of qinghai-Tibet Plateau.

    2022-05-20 152 0

  • Physicochemical properties of glacial snow and ice on the Tibetan Plateau (2015-2020)

    Physicochemical properties of glacial snow and ice on the Tibetan Plateau (2015-2020)

    From 2015 to 2020, physicochemical properties of glacial snow and ice of NO.15 glacier (NO.15), 24K glacier (24K), Azha glacier(AZ), Cuopugou glacier(CPG), Demula glacier (DML), Dongrongbu glacier (DRB), Dongkemadi glacier (DKMD), Dunde glacier (DD), Guliya glacier (GLY), Hongqi Lapu glacier (HQLP), Kangxiwa River glacier (KXW), Kangwure glacier (KWR), Kuoqionggangri glacier (KQGR), Langadingri glacier (LADR), Mengdagangri glacier (MDGR), Mugagangqiong glacier (MGGQ), Muji glacier (MJ), Mushtag glacier (MSTG), Namunani glacier (NMNN), Nima glacier (NM), Nujiangyuantou (NJYT), Palung 4 glacier (PL4), Qiangtang No.1 glacier (QT), Qiangyong glacier (QY), Quma glacier (QM), Seqila glacier (SQL), Tanggula longxiazailongba glacier (LXZ), Xiagangjiang glacier (XGJ), Yala glacier (YL), Zepugou glacier (ZPG), Zhuxigou glacier (ZXG) on the Tibetan plateau, including DOC The samples were analyzed by 0.45 µm molecular membranes. Samples were filtered through 0.45 micron molecular membranes and tested using a Shimadzu TOC-L instrument, while ion concentrations were measured by ion chromatography. The unit of the indicator is mg/L. "n.a." means below the detection limit of the instrument, and "\" means missing value. Sheet1 in the table is "Physicochemical properties of glaciers and snow ice on the Tibetan Plateau (2015-2020)", and sheet2 is "Basic information of glaciers".

    2022-05-20 370 6

  • Socio economic data of Sichuan Tibet line and surrounding areas (2015)

    Socio economic data of Sichuan Tibet line and surrounding areas (2015)

    The data is 1:250000 socio-economic data of Sichuan Tibet line and surrounding areas, including GDP, population and other data. Population and GDP are one of the important indicators of social and economic development, regional planning and resource and environmental protection. Administrative regions are usually taken as the basic statistical unit. The spatialization of population and GDP replaces the traditional administrative statistics unit with spatial statistics unit, which brings great convenience for data sharing and spatial statistical analysis among multiple fields. The data comes from the kilometer grid data set of China's population and GDP spatial distribution of resource and environmental science and data center. The data set of China's population and GDP spatial distribution kilometer grid of resource and environmental science and data center is cut according to the scope of Sichuan Tibet railway and surrounding areas. The data is in grid format and accurate to every square kilometer. It is applicable to the Sichuan Tibet line and surrounding areas. Population and GDP are one of the important indicators of social and economic development, regional planning and resource and environmental protection.

    2022-05-19 310 73

  • Distribution data of water system in 1:250000 class III watershed along Sichuan Tibet line and surrounding areas (2012)

    Distribution data of water system in 1:250000 class III watershed along Sichuan Tibet line and surrounding areas (2012)

    This data set is extracted according to the mask of Sichuan Tibet line and surrounding areas according to the data of 1:250000 river water system in three-level watershed of Qinghai Tibet Plateau (2012), which is vector data. Geographic coordinate system: GCS_ China_ Geodetic_ Coordinate_ System_ 2000; Spatial accuracy: scale 1:250000. The data can be opened and used by ArcGIS, envi or other geographic information systems and remote sensing software. Water system can be used to divide small watersheds, determine the watershed area, and calculate the characteristic parameters of water system, such as river network density, river system development coefficient, river system non-uniformity coefficient, etc. it plays an important role in the field of hydrology.

    2022-05-19 253 79

  • 1:250000 topographic data of Himalayan basin (2018)

    1:250000 topographic data of Himalayan basin (2018)

    The data is 1:250000 topographic data of the Himalayan mountains where the Himalayan mountain basin is located. It is extracted by strm90m elevation data entity according to the Himalayan mountain boundary mask in ArcGIS software. It is 90m grid resolution. Because DEM describes the ground elevation information, it is widely used in the fields of Surveying and mapping, hydrology, meteorology, geomorphology, geology, soil, engineering construction, communication, military and other national economy and national defense construction, 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 system network analysis, rainfall analysis, flood storage calculation, inundation analysis, etc.

    2022-05-19 255 75

  • 1:4 million geomorphic type data of Qinghai Tibet Plateau (1996)

    1:4 million geomorphic type data of Qinghai Tibet Plateau (1996)

    The data is 1:4 million geomorphic type data of the Qinghai Tibet Plateau. The geomorphic map can express the results of geomorphic research and is an important method to study geomorphology. It plays an important role in geomorphology and the continuous development of geomorphic research. The data includes two parts. SHP data comes from China's 1:4 million morphological and geomorphic map, and the spatial scope is in China; Grid data is from USGS( https://rmgsc.cr.usgs.gov/outgoing/ecosystems/Global/ ), the spatial scope extends to the Qinghai Tibet Plateau and adjacent mountainous areas, including some overseas areas. The vector data consists of 1:4 million morphological geomorphic map, which is scanned, registered and vector digitized. During digitization, the accuracy is guaranteed to be within 2 pixels. The grid data is obtained through spatial calibration, accuracy verification and cutting. The detailed data processing process can be seen https://onlinelibrary.wiley.com/doi/full/10.1111/tgis.12265 。

    2022-05-19 587 0