中国1956—2006年地表土壤冻结天数时空分布及其变化特征
王康1, 张廷军2,3,*

Spatial and Temporal Distribution and Variations in the Near-surface Soil Freezing Days across China, 1956-2006
Wang Kang1, Zhang Tingjun1,2,*
图3 中国1971#cod#x02014;2000年冻结天数的多年均值 等值线间隔为15天
Fig.3 Average number of near-surface soil freezing days from 1971 to 2000 across China The contour interval is 15 days