Increasing global heatwave occurrence associated with land-atmosphere interactions

IF 9.6 1区地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES

npj Climate and Atmospheric Science Pub Date : 2026-02-27 DOI:10.1038/s41612-026-01356-1

Pengshuai Bi, Xiao Chen, Zhihua Pan, Na Huang, Riping Gao, Jingyu Men, Changlin Wu, Fangxiao Zhang, Zhanrui Huang, Enze Gao, Yijia Yao, Buju Long

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Abstract

Marked increases in heatwave frequency and intensity under global warming threaten ecosystems and societies. While large-scale atmospheric circulation has been considered the dominant influence, the role of land-atmosphere coupling remains unclear. Using ERA5 reanalysis data (1980–2022), we analyze the spatiotemporal evolution of heatwaves and assess soil moisture (SM) and sensible heat flux (SH) anomalies during the two days preceding onset. Most heatwaves occur under the NP (negative SM and positive SH anomalies) state. In 93.41% of global land areas, heatwaves occur most frequently under the NP state, while in 69.53% of land areas, heatwave frequency increases most rapidly under the NP state. Compared with 1980–2000, NP-state heatwaves increased by 5.21 events per decade during 2002–2022, with frequency doubling in 87.29% of land areas. Nearly 7% of land shifted from other states to NP dominance. These results highlight a close association between land-atmosphere coupling and heatwave occurrence.

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与陆地-大气相互作用有关的全球热浪发生的增加

在全球变暖的背景下，热浪频率和强度的显著增加威胁着生态系统和社会。虽然大尺度大气环流被认为是主要影响因素，但陆地-大气耦合的作用仍不清楚。利用ERA5再分析数据（1980-2022年），分析了热浪发生前2 d的时空演变，并评估了土壤湿度（SM）和感热通量（SH）的异常。大多数热浪发生在NP（负SM和正SH异常）状态下。在全球93.41%的陆地面积中，NP状态下热浪发生频率最高，而在69.53%的陆地面积中，NP状态下热浪频率增长最快。与1980-2000年相比，2002-2022年期间，np状态热浪每10年增加5.21次，87.29%的陆地面积频率增加了一倍。近7%的土地从其他邦转移到NP主导。这些结果强调了陆地-大气耦合与热浪发生之间的密切联系。

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来源期刊

npj Climate and Atmospheric Science Earth and Planetary Sciences-Atmospheric Science

CiteScore

8.80

自引率

3.30%

发文量

审稿时长

21 weeks

期刊介绍： npj Climate and Atmospheric Science is an open-access journal encompassing the relevant physical, chemical, and biological aspects of atmospheric and climate science. The journal places particular emphasis on regional studies that unveil new insights into specific localities, including examinations of local atmospheric composition, such as aerosols. The range of topics covered by the journal includes climate dynamics, climate variability, weather and climate prediction, climate change, ocean dynamics, weather extremes, air pollution, atmospheric chemistry (including aerosols), the hydrological cycle, and atmosphere–ocean and atmosphere–land interactions. The journal welcomes studies employing a diverse array of methods, including numerical and statistical modeling, the development and application of in situ observational techniques, remote sensing, and the development or evaluation of new reanalyses.