Journal of Glaciology and Geocryology

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Characteristics and mechanisms of snow cover changes in the black soil region of Northeast China in hydrological years from 1979 to 2020

WANG Jinxia, ZHANG Lijuan, WANG Fang, HUANG Yutao, ZHAO Yufeng, LIU Jie, CHENG Xiyao, WANG Jiaxin, ZHAO Lingyue, YI Qiujing, QIN Kaifeng

Journal of Glaciology and Geocryology, 2025, 47(1): 98-110. DOI: 10.7522/j.issn.1000-0240.2025.0008

Fig. 5 Interannual variations of the first day （a）， the last day of （b） and stable period （c） of snow cover in the black soil region of Northeast China in hydrological years from 1979 to 2020

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Fig. 1 Map of the study area ［Revised plot plan review number： GS（2024）0650］
Table 1 Interannual variations in snow depth in the black soil region of Northeast China in hydrological years from 1979 to 2020
Fig. 2 Spatial distribution of mean annual snow depth in the black soil region of Northeast China in hydrological years from 1979 to 2020
Fig. 3 Spatial distribution of average snow depth by months ［January （a）， February （b）， March （c）， April （d）， May （e）， September （f）， October （g）， November （h）， December （i）］ and seasons ［spring （j）， autumn （k）， winter （l）］ in the black soil region of Northeast China in hydrological years from 1979 to 2020
Fig.4 Spatial variation rate of annual （a）， spring （b）， and March （c） and April （d） average snow depth in the black soil region of Northeast China in hydrological years from 1979 to 2020
Note：The area marked with dots in the figure is the area that passes the 95% significance test （the same as below）.
Table 2 Spatial variation in average snow depth in March， April， and spring in the black soil region of Northeast China in hydrological years from 1979 to 2020 in terms of area share
Fig. 6 Spatial distribution of the first day （a）， the last day （b）， and stable period （c） of snow cover in the black soil region of Northeast China in hydrological years from 1979 to 2020
Table 3 Spatial distribution of snow cover in the black soil region of Northeast China in hydrological years from 1979 to 2020 in terms of area share
Fig. 7 Spatial variations of the first day （a）， the last day （b）， and stable period （c） of snow cover in the black soil region of Northeast China in hydrological years from 1979 to 2020
Table 4 Spatial variation of snow cover in the black soil region of Northeast China in hydrological years from 1979 to 2020 in terms of area share
Table 5 Interannual variation of average snow cover area by months and seasons in the black soil region of Northeast China in hydrological years from 1979 to 2020
Fig. 8 Spatial distribution of mean annual snow cover area in the black soil region of Northeast China in hydrological years from 1979 to 2020
Fig. 9 Spatial distribution of average stable snow cover area by months ［January （a）， February （b）， March （c）， April （d）， October （e）， November （f）， December （g）］ and seasons ［spring （h）， autumn （i）， winter （j）］ in the black soil region of Northeast China in hydrological years from 1979 to 2020
Table 6 Spatial distribution of the average stable snow cover area in the black soil region of Northeast China by months and seasons in hydrological years from 1979 to 2020 in terms of area share
Fig. 10 Spatial variation of mean annual snow cover area in the black soil region of Northeast China in hydrological years from 1979 to 2020

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