松花江区气象水文干旱演变特征
吴燕锋, 章光新

Spatio-temporal Patterns of Meteorological and Hydrological Drought in the Songhua River Area from 1961 to 2010
Yanfeng Wu, Guangxin Zhang
图4 松花江区干旱频次(a)、强度(b)、持续时间(c)和变化趋势(d)的空间分布特征
Fig.4 Spatial variation of meteorological drought frequency(a), intensities(b), durations(c) and change trend(d) in the Songhua River Area