2022年夏季长江流域重大干旱特征及其成因研究

李忆平, 张金玉, 岳平, 王素萍, 查鹏飞, 王丽娟, 沙莎, 张良, 曾鼎文, 任余龙, 胡蝶

Study on characteristics of severe drought event over Yangtze River Basin in summer of 2022 and its causes

LI Yiping, ZHANG Jinyu, YUE Ping, WANG Suping, ZHA Pengfei, WANG Lijuan, SHA Sha, ZHANG Liang, ZENG Dingwen, REN Yulong, HU Die

图5 2022年夏季长江流域旱情最严重区自然植被逐旬土壤体积含水量与2021年同期差值（a）、2022年夏季逐旬土壤水分增量（当前旬减前一旬）（b）及2014—2022年7—8月土壤水分增量（每年7—8月平均值减当年5月土壤体积含水量）的年际变化（c）

Fig.5 Differences of ten-day’s soil volumetric water content of natural vegetation in area with the most severe drought over the Yangtze River Basin between the summer of 2022 and the same period of 2021 （a）， the incremental soil moisture in summer of 2022 （the difference of volumetric soil water content between the right now ten-day and the former one） （b）， the yearly variation of the incremental soil moisture in July-August （the difference between the average of the volumetric soil water content in July-August each year and the value in May of the current year） during 2014-2022 （c）