Meteorological observation data of the terminus of Naimona'nyi Glacier (2011-2017)

This data set includes the temperature, relative humidity, and other daily values at the end of the observation point of the terminus of Naimona’nyi Glacier The data is observed from July 3, 2011 to September 15, 2017. It is measured by automatic meteorological station (Onset Company) and a piece of data is recorded every 60minutes. The original data forms a continuous time series after quality control, and the daily mean index data is obtained through calculation. The original data meets the accuracy requirements of China Meteorological Administration (CMA) and the World Meteorological Organization (WMO) for meteorological observation. Quality control includes eliminating the systematic error caused by the missing point data and sensor failure. The data is stored as an excel file.

0 2019-11-17

Antarctic and Actic sea ice data set (1979-2019)

The original data of the Arctic and Antarctic sea ice data set is generated by the National Snow and Ice Data Center (NSIDC) through remote sensing data. The data format is GeoTIFF format and image format. The spatial resolution of the data is 25km and the time resolution is day. The data content is the sea ice range and sea ice density of the north and south poles. In this study, NetCDF format products are generated by post-processing the extent and density of sea ice in the north and south poles. The product data includes the sea ice range and sea ice density data of the north and south poles from 1979 to 2019. The time resolution is day by day, the coverage range is the South Pole and the north pole, and the horizontal spatial resolution is 12.5km. The data value of 1 in the sea ice range matrix indicates that the grid is sea ice, and the sea ice density is expressed by 0-1000. The grid value divided by 10 is the sea ice density value of the grid.

0 2019-11-17

The Ice-core Dataset in Three Pole (1968-2015)

The data of triode ice core mainly comes from NOAA (National Oceanic and Atmospheric Administration, The original data is mainly in text format, which is provided by relevant units and researchers voluntarily. The data mainly includes the original observation data such as oxygen isotope, greenhouse gas concentration, ice core age, etc., as well as the historical temperature, carbon dioxide concentration and methane concentration produced by the researchers according to the observation data. The data are mainly divided into Antarctic, Arctic, Greenland and the third polar region. The database includes drilling address, time, derivative products, corresponding observation site data, references and other elements. Derivative products include product name, type, time and other elements. The space location is divided into the south pole, the north pole and the third pole, including Alaska, Canada, Russia, Greenland and other regions. After sorting and post-processing the collected data, the ice core database is established by using the access database management system of Microsoft office. According to the Antarctic, Arctic, Greenland and the third pole, it is divided into four sub databases. The first table in each database is readme, which contains information and references of each data table.

0 2019-11-17

Dataset of resources and environment of Cryosphere in Urumqi River Basin

The dataset contains: I. document Dataset description file 二. Grid The Urumqi River Basin in Tianshan is divided into two sub regions: the upper reaches and the No. 1 glacier area. The data scale of the upstream area is 1:50000, and the grid size of the two kinds of precision digital elevation model is 2000 × 2000m and 100 × 100m respectively; the data scale of the source area is 1:5000, and the grid size of the digital elevation model is 5*5m. Digital elevation model of glacier in Headwater Area Digital elevation model of No.1 glacier in 1973、1980 and 1986; digital elevation model of No.2 glacier in 1963、1968、1973、1980 and 1986. 三, Map Thumbnails of various data types 四. rsimage TM, ETM,remote sensing image 五. Vector includes: (1) soil type map (Soil): geocode soil type (2) land resource evaluation map (Landeval): geocode, land type , subclass (3) land type map(Landtype): geocode, category, subclass (4) landuse map(Landuse): geocode, category, subclass (5) current situation of water resources utilization (wateruse): geocode, category, subclass (6) human activity(activity): geocode , category 2、 glaicer: No.1 glacier map (73, 80, 86 years), No.2 glacier map (62, 64, 73, 80years), including glacier, glacier boundary, contour data 3、 upstream sub area UP: (1) boundary (2) Subregional drainage system(River)(3) soil type map (Soil) (4) land resource evaluation map (Landeval) (5) land type map(Landtype) (6)landuse map(Landuse) (7) current situation of water resources utilization (wateruse) (8) human activity(activity) (9) Glacier distribution map(Glacier) Data projection: Project: reverse & Mercator False_easting: 500000.000000 False_northing: 0.000000 Central_meridian: 87.000000 Scale factor: 1.000000 Latitude_Of_Origin: 0.000000 Linear Unit: Meter (1.000000) Geographic Coordinate System: GCS_Krasovsky_1940

0 2019-11-14

Changes of water balance and NDVI data in the Tarim River Basin (2002-2014)

the spatial-temporal changes in the hydrological variables and the normalized difference vegetation index (NDVI) during 2002-2014 were investigated using multiple satellite data and a remote sensing energy balance model.

0 2019-11-08

River lake ice range / coverage data set v1.0

There are many lakes in the Qinghai Tibet Plateau. The glacial phenology and duration of lakes in this region are very sensitive to regional and global climate change, so they are used as the key indicators of climate change research, especially the comparative study of the three polar environmental changes of the earth. However, due to its poor natural environment and sparse population, there is a lack of conventional field measurement of lake ice phenology. The lake ice was monitored with a resolution of 500 meters by using the normalized difference snow index (NDSI) data of MODIS. The traditional snow map algorithm is used to detect the lake daily ice amount and coverage under the condition of sunny days, and the lake daily ice amount and coverage under the condition of cloud cover are re determined through a series of steps based on the spatiotemporal continuity of the lake surface conditions. Through time series analysis, 308 lakes larger than 3km2 are identified as effective records of lake ice range and coverage, forming a daily lake ice range and coverage data set, including 216 lakes.

0 2019-11-05

0 2019-10-28

Scatterometer ice sheet freeze-thaw data in Antarctica and Greenland (2015-2019) v1.0

The coverage time of microwave scatterometer ice sheet freeze-thaw data is updated to 2015-2019, with a spatial resolution of 4.45km. The time resolution is day by day, and the coverage range is the polar ice sheet. The remote sensing inversion method based on microwave radiometer considers the change of snow cover characteristics in space-time and space. Firstly, the DVPR time series data of scatterometer data is extracted, the high time resolution of scatterometer data is effectively used, and the influence of terrain is removed by channel difference. Then, the variance value of time series at each sampling point is simulated by generalized Gaussian model, so as to make the region. The generalized Gaussian model needs less input parameters than the traditional double Gaussian model, and the obtained threshold is also unique. Finally, the moving window segmentation algorithm is used to accurately find the melting start time, end time and duration of the wet snow point, which can effectively remove the temperature mutation in the melting or non melting period. The impact. The data of long time series microwave scatterometer are from QSCAT and ASCAT. The verification of the measured stations shows that the detection accuracy of ice sheet freezing and thawing is over 70%. The data is stored in a bin file every day. Each file of Antarctic freeze-thaw data based on microwave scatterometer is composed of 810 * 680 grid, and each file of Greenland ice sheet freeze-thaw data is composed of 810 * 680 grid (0 value: non melting area, 1 Value: melting area).

0 2019-10-26

Data of ad metal elements in Miaoergou ice core, Tianshan (1956-2004)

This project is based on the data of bioactive elements such as Fe in miaergou ice core (94 ° 19 ′ e, 43 ° 03 ′ n, 4518 m) of the East Tianshan Mountains, and rebuilt the metal element history of 1956-2004. Data content: 1956-2004 ice core metal elements (including Fe, CD, Pb, as, Ba, Al, s, Mn, CO and Ni); data source, through ICP-MS test; data quality: blank sample is significantly lower than sample value, with better quality; data application results and prospects: data has been published, see Du, Z., Xiao, C., Zhang, W., Handley, M. J., mayewski, P. A., Liu, Y., & Li, X. (20. 19). Iron record associated with sandstorms in a central Asian shallow ice core spanning 1956-2004. Atmospheric environment, 203, 121-130. It can provide comparative study of other ice cores in Central Asia.

0 2019-10-26

Typical glacial velocity dataset of the north and south poles of the QTP (2000-2017) v1.0

Glaciers are very sensitive to regional and global climate change, so they are often regarded as one of the indicators of climate change, and their relevant parameters are also the key indicators of climate change research. Especially in the comparative study of the three polar environmental changes on the earth, the time and space difference ratio of glacial speed is one of the focuses of climate change research. However, because glaciers are basically located in high altitude, high latitude and high cold areas, the natural environment is poor, and people are rarely seen, and it is difficult to carry out the conventional field measurement of large-scale glacial movement. In order to understand the glacial movement in the three polar areas in a timely, efficient, comprehensive and accurate manner, radar interferometry, radar and optical image pixel tracking are used to obtain the three polar areas. The distribution of surface movement of some typical glaciers in some years from 2000 to 2017 provides basic data for the comparative analysis of the movement of the three polar glaciers. The dataset contains 12 grid files named "glacier movement in a certain period of time in a certain region". Each grid map mainly contains the regional velocity distribution of a typical glacier.

0 2019-10-26