Spatially compounding flood-nocturnal heat events over adjacent regions in the Northern Hemisphere

IF 8.5 1区地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES

npj Climate and Atmospheric Science Pub Date : 2024-10-07 DOI:10.1038/s41612-024-00795-y

Ruidan Chen, Jianbin Liu, Siao Tang, Xiaoqi Li

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Abstract

Compound events have become more frequent and diverse under global warming. This study specifically focuses on a type of compound events termed spatially compounding flood-nocturnal heat events over adjacent regions. Five flood hotspots are identified to compound with adjacent nocturnal heat. The flood and nocturnal heat are linked via a water vapor transport belt, with flood over the region of prominent water vapor convergence and ascending anomalies and nocturnal heat over the extension region with moderately increased humidity and weak vertical motion anomaly. The compound events for all the hotspots occur more frequently recently, with commonly positive contribution from the increasing trends of nocturnal temperature (TN) but various contribution from the trends of precipitation (Pr) and Pr-TN correlation. The positive contribution of enhanced Pr-TN correlation results from the enhanced variability of the circulation accompanied with water vapor transport. This study highlights the influence of atmospheric circulation variability on compound events.

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北半球相邻地区洪水-夜间高温事件的空间复合效应

在全球变暖的情况下，复合事件变得更加频繁和多样。本研究特别关注一种复合事件，即相邻区域的洪水-夜间高温事件的空间复合。研究确定了五个洪水热点与相邻的夜热事件复合。洪水和夜热通过水汽输送带联系在一起，洪水发生在水汽辐合和上升异常显著的区域，夜热发生在湿度适度增加和垂直运动异常较弱的延伸区域。所有热点的复合事件在近期发生得更为频繁，夜间温度（TN）的上升趋势通常对复合事件有正贡献，但降水（Pr）的趋势和 Pr-TN 相关性对复合事件有不同的贡献。Pr-TN相关性增强的正贡献源于伴随水汽输送的环流变率增强。这项研究强调了大气环流变率对复合事件的影响。

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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.