TY  - Data
T1  - A map-constrained dataset of frozen ground distribution changes on the Qinghai-Tibetan Plateau from 1980 to 2018
A1  - NAN Zhuotong 
A1  - Ji Hailong
DO  - 10.12072/ncdc.permalab.db7196.2026
PY  - 2026
DA  - 2026-03-19
PB  - National Cryosphere Desert Data Center
AB  - This dataset provides a set of annual frozen ground distribution products for the Qinghai-Tibetan Plateau from 1980 to 2018. It employed a Map-based Calibration(CaliMAP) strategy, utilizing a highly accurate reference map (hereafter referred to as the 2010 map) as a region-wide spatial constraint. Through a Bayesian optimization algorithm, 26 heterogeneous sensitive parameters of the Noah-Tibet land surface model were optimized, and 13 best-performing parameter combinations from the optimization posterior were selected to construct a parameter ensemble.This dataset contains 39 annual raster files in GeoTIFF format from 1980 to 2018, with a spatial resolution of 0.1°, utilizing the Albers Equal Area Conic projection.The raster pixel values are classified as follows: 1 represents Permafrost, 2 represents Seasonally Frozen Ground (SFG), and 3 represents Non-frozen ground. Glaciers, lakes, and areas outside the study region are all masked as NoData.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/7b1c8585-827b-4590-a35e-4f282137b5d3
ER  -