我国干旱半干旱区近60 a气象干旱气候特征分析

李春华, 朱飙, 杨金虎, 黄鹏程

Analysis of climatic characteristics of meteorological drought in arid and semi-arid regions of China in recent 60 years

LI Chunhua, ZHU Biao, YANG Jinhu, HUANG Pengcheng

图3 1961—2020年我国干旱区（左）、半干旱区（右）不同等级干旱发生日数年际变化

Fig.3 The inter-annual variation of occurrence days of drought with different grades in arid （the left） and semi-arid （the right） region of China during 1961-2020