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中国东北兴安岭地区年冻融频次的分布规律
魏豪1,5(), 张泽2,1,3(), MELNIKOV Andrey4, 金豆豆1,5, 高思如1, 冯文杰1
Distribution law of annual freeze-thaw frequency in Xing’anling region of Northeast China
Hao WEI1,5(), Ze ZHANG2,1,3(), Andrey MELNIKOV4, Doudou JIN1,5, Siru GAO1, Wenjie FENG1

图6. 兴安岭地区各气候区UtN 的变化情况

Fig. 6. Variation of UtN of four climate zones in Xing’anling region: cold temperate humid area (a), middle temperate humid zone (b), middle temperate sub-humid zone (c) and middle temperate semi-arid zone (d)