Climate warming and summer monsoon breaks drive compound dry and hot extremes in India

被引：22

作者：

Rajeev, Akshay ^{[1
]}

Mahto, Shanti Shwarup ^{[1
]}

Mishra, Vimal ^{[1
,2
]}

机构：

[1] Indian Inst Technol IIT Gandhinagar, Earth Sci, Gandhinagar, Gujarat, India

[2] Indian Inst Technol IIT Gandhinagar, Civil Engn, Gandhinagar, Gandhinagar, Gujarat, India

来源：

ISCIENCE | 2022年 / 25卷 / 11期

关键词：

SOIL-MOISTURE; HEAT-WAVE; SPELLS; TEMPERATURE; VARIABILITY; DROUGHTS; LAND; HEATWAVES; INCREASE; WATER;

D O I：

10.1016/j.isci.2022.105377

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Considering the severe impacts of compound dry and hot extremes, we examine the primary drivers of CDHEs during the summer monsoon in India. Using ERA5 reanalysis, we show that most of the CDHEs in India occur during the droughts caused by the summer monsoon rainfall deficit. Despite a decline in the frequency of summer monsoon droughts in recent decades, increased CDHEs are mainly driven by warming and dry spells during the summer monsoon particularly in the Northeast, central northeast, and west central regions. A strong land-atmospheric coupling during droughts in the summer monsoon season leads to frequent CDHE in the Northwest and southern peninsular regions. Furthermore, regional variations in land atmospheric coupling cause substantial differences in the CDHE occurrence in different parts of the country. Summer monsoon rainfall variability and increased warming can pose a greater risk of compound dry and hot extremes with severe impacts on various sectors in India.

引用

页数：18

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