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