Warm sea surface temperatures and anthropogenic warming boosted the 2019 severe drought in East China

Warm central equatorial pacific sea surface temperatures and anthropogenic warming boosted the 2019 severe drought in East China
A persistent severe drought occurred over East China along the Yangtze River in 2019. The photo on the cover of Advances in Atmospheric Sciences shows cracked lake bottom of Poyang Lake in Jiangxi Province of China in July 2019. Credit: Jufang Hu

Drought usually originates from a deficiency of precipitation over an extended period of time and is identified as one of the extreme aspects of the hydrological cycle. Because of its destructive impacts on human life, agriculture, ecology, and physical systems of affected regions, there is increasing interest in understanding changes in drought under global warming and quantifying the role of human and other external influences on drought.

A occurred in East China from August to October 2019 against a background of long-term significant warming and caused widespread impacts on agriculture and society, emphasizing the urgent need to understand the mechanism responsible for this drought and its linkage to global warming.

"Whether severe droughts of this type are likely to increase under is of great concern for both the public and policymakers," says Congwen Zhu, the corresponding author of a recently published paper in Advances in Atmospheric Sciences. "Thus, our study was aimed at understanding the possible mechanisms responsible for this most severe drought in East China and to further explore its linkage with natural climate variability and anthropogenic global warming."

Zhu is a researcher from the Chinese Academy of Meteorological Sciences (CAMS). He and his colleagues found that warm central equatorial Pacific sea surface temperatures and anthropogenic warming were possibly responsible for this drought event.

"This drought was naturally driven by the extremely warm central equatorial Pacific sea surface temperature. However, has enhanced the probability of a severe drought like this occurring," concludes Shuangmei Ma, the first author of the paper, who is an associate researcher at CAMS.


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More information: Shuangmei Ma et al, Combined Impacts of Warm Central Equatorial Pacific Sea Surface Temperatures and Anthropogenic Warming on the 2019 Severe Drought in East China, Advances in Atmospheric Sciences (2020). DOI: 10.1007/s00376-020-0077-8
Citation: Warm sea surface temperatures and anthropogenic warming boosted the 2019 severe drought in East China (2020, October 14) retrieved 22 October 2020 from https://phys.org/news/2020-10-sea-surface-temperatures-anthropogenic-boosted.html
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