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6. 1964—2017年东北地区月最大冻土深度极值空间分布 |
Fig.6. Spatial distribution of extreme value of monthly maximum frozen soil depth in Northeast China from 1964 to 2017 |
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