%0 Dataset
%T Daily cloudless NDSI data set with 500m resolution snow season in Northeast China (2000-2020)
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/a1d6146d-df7b-43bc-836d-922002130e50
%W NCDC
%R 10.12072/ncdc.I-SNOW.db0024.2021
%A None
%A None
%A None
%A None
%A None
%A None
%A Wang xiaoyan 
%K Northeast China;2000-2020;NDSI;remote sensing products
%X <pre><code>                    <pre><code>Northeast China is one of the Three Snow areas in China. The region is located in high latitude, with low solar altitude angle in winter, poor lighting conditions, and high forest coverage. At present, the normalized difference snow index (NDSI) provided by MODIS V6 snow product has an obvious problem of excessive cloud mask in Northeast China, especially in northeast forest areas, which seriously affects the application of this product in the study of temporal and spatial variation of snow. At the same time, MODIS V6 snow products adopt low NDSI shielding, resulting in snow leakage in forest areas. Taking various MODIS V6 data sets as the source data, using the methods of morning and afternoon star synthesis, decision tree classification and spatio-temporal adaptive cloud removal respectively, the NDSI daily cloudless products with high precision and spatio-temporal continuity in Northeast China during the snow season from 2000 to 2020 were produced. This data set can be used for snow area mapping and snow phenology in Northeast China.