大气环流和热力学因素的变化对 1973-2020 年中国北方春季大风事件趋势的贡献

IF 4.8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Climatic Change Pub Date : 2024-05-28 DOI:10.1007/s10584-024-03749-8
Zhengtai Zhang, Wenchao Han, Tian Xian
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摘要

中国上空的地面风速(SWS)在 20 世纪 90 年代中期之前呈下降趋势,称为 SWS 静止,之后呈上升趋势。由于大风的影响,中国北方在春季很容易发生沙尘事件。本研究调查了中国北方春季大风事件的特征和成因。我们发现,大风事件在西南气旋静止期和恢复期都呈下降趋势,1973-2020 年期间达到-0.68 天/年。有四种天气系统与大风事件有关,对这四种天气系统的分析表明,欧亚大陆东部的深槽容易引起大风事件。大气环流的变化在一定程度上导致了大风事件的减少,而人类排放温室气体和气溶胶所产生的热力学因素,以及土地利用变化所导致的辐射变化,在过去 50 年间主导了大风事件的减少趋势。
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Contributions of changes in atmospheric circulation and thermodynamic factors to trends in spring gale events in northern China from 1973 to 2020

Surface wind speed (SWS) over China exhibited a decreasing trend before the mid-1990s, referred to as SWS stilling, and an increasing trend thereafter. Northern China is susceptible to dust incidents in spring because of gales. In this study, we investigate the characteristics and causes of spring gale events over northern China. We find that gale events had a decreasing trend during both the SWS stilling and recovery period, reaching -0.68 day/year during the period 1973-2020. Four types of weather systems are associated with gale events, and analysis of all four weather systems indicates that the deep trough in the east of Eurasia is prone to cause gale events. Changes in atmospheric circulation contributed in part to the decrease of gale events, while thermodynamic factors arising from human emissions of greenhouse gases and aerosols, and radiation changes caused by land use change, dominated the decreasing trend of gale events during the last 5 decades.

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来源期刊
Climatic Change
Climatic Change 环境科学-环境科学
CiteScore
10.20
自引率
4.20%
发文量
180
审稿时长
7.5 months
期刊介绍: Climatic Change is dedicated to the totality of the problem of climatic variability and change - its descriptions, causes, implications and interactions among these. The purpose of the journal is to provide a means of exchange among those working in different disciplines on problems related to climatic variations. This means that authors have an opportunity to communicate the essence of their studies to people in other climate-related disciplines and to interested non-disciplinarians, as well as to report on research in which the originality is in the combinations of (not necessarily original) work from several disciplines. The journal also includes vigorous editorial and book review sections.
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