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The characterization, mechanism, predictability, and impacts of the unprecedented 2023 Southeast Asia heatwave

Earth Sciences

The characterization, mechanism, predictability, and impacts of the unprecedented 2023 Southeast Asia heatwave

Y. Lyu, J. Wang, et al.

In light of the extraordinary heatwave that swept across Southeast Asia in April and May 2023, research by Yang Lyu and colleagues reveals critical insights into its physical mechanisms and widespread impacts including health risks and agricultural challenges. This study highlights essential factors like high-pressure systems and soil moisture deficiencies that contributed to this climatic anomaly.

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Playback language: English
Abstract
In April and May 2023, Southeast Asia (SEA) experienced an exceptional heatwave, particularly impacting Continental SEA. This study comprehensively analyzes this event, investigating its spatiotemporal evolution, physical mechanisms, forecast performance, return period, and impacts. Enhanced high-pressure systems, moisture deficiency, and strong land-atmosphere coupling are identified as key drivers. The ECMWF model underestimated the heatwave's intensity due to limited forecast skills regarding soil moisture and land-atmosphere coupling. While the return period is estimated at 129 years based on temperature records, the combined probability of near-surface drying and soil moisture deficiency is only 0.08%. Broad impacts included health issues, increased wildfires, and reduced agricultural yields.
Publisher
npj Climate and Atmospheric Science
Published On
Oct 14, 2024
Authors
Yang Lyu, Jingyu Wang, Xiefei Zhi, Xianfeng Wang, Hugh Zhang, Yonggang Wen, Edward Park, Joshua Lee, Xia Wan, Shoupeng Zhu, Duc Tran Dung
Tags
heatwave
Southeast Asia
climate change
agricultural impacts
high-pressure systems
soil moisture
health risks

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