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
表4 1961—1990年和1991—2020年我国干旱半干旱区不同等级干旱发生次数、日数平均值差异的显著性检验
Tab.4 The significance test of difference of mean frequency and occurrence days of different grades drought between 1961-1990 and 1991-2020 in arid and semi-arid regions of China
干旱等级 发生次数检验 发生日数检验
干旱区 半干旱区 干旱区 半干旱区
轻旱 1 1 1 1
中旱 0 3 0 4
重旱 3 3 3 3
特旱 4 1 4 1