东北地区冬半年积雪与气温对冻土的影响
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Influence of snow and temperature on the depth of frozen soil in winter half year in Northeast China
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图4. 1964—2017年东北地区冬半年平均最大积雪深度(a)、平均气温(b)、地表平均气温(c)、负积温(d)空间分布 |
Fig.4. Spatial distribution of average maximum snow depth (a), average temperature (b), average surface temperature (c), negative accumulated temperature (d) in winter half year in Northeast China from 1964 to 2017 |
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