亚日降水对中国各气候带极端温度的差异影响

IF 4.6 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Chengqing Chen, Shanshan Wang, Zhiyang Wang, Xiaoping Li
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引用次数: 0

摘要

降水事件可以影响温度并调节其对气候变化的响应,但亚日降水对中国极端温度的影响研究尚不充分。因此,本研究聚焦于1952 - 2019年降水对中国各气候区日最高气温(Tmax)和日最低气温(Tmin)的影响。结果表明,降水通过云效应和蒸发冷却对Tmax产生冷却效应,特别是在干旱和半湿润地区。在干旱区,降水通过增加向下的长波辐射和土壤热力学变化增强Tmin,而在湿润地区,降雨诱发的蒸发冷却抑制Tmin。值得注意的是,多雨天气的Tmax升温趋势在潮湿地区缺乏统计学意义,而干燥天气的Tmin持续升温。这些发现揭示了降水对温度的饱和效应,并为理解降水-温度相互作用提供了一个框架,对改进气候模式和评估全球变暖具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Differential Impacts of Sub-Daily Precipitation on Temperature Extremes Across China's Climatic Zones

Differential Impacts of Sub-Daily Precipitation on Temperature Extremes Across China's Climatic Zones

Differential Impacts of Sub-Daily Precipitation on Temperature Extremes Across China's Climatic Zones

Differential Impacts of Sub-Daily Precipitation on Temperature Extremes Across China's Climatic Zones

Differential Impacts of Sub-Daily Precipitation on Temperature Extremes Across China's Climatic Zones

Precipitation events can effect temperature and modulate its response to climate change, yet the impact of sub-daily precipitation on temperature extremes in China has been understudied. This study therefore focuses on the impact of precipitation on daily maximum temperature (Tmax) and daily minimum temperature (Tmin) across China's climatic regions from 1952 to 2019. Results show that precipitation-induced cooling effects on Tmax through cloud effects and evaporative cooling, particularly in arid and semi-humid regions. In arid regions, precipitation enhances Tmin through increased downward longwave radiation and changes in soil thermodynamics, while in humid regions, rainfall-induced evaporative cooling suppresses Tmin. Notably, the Tmax warming trend during rainy weathers lacks statistical significance in humid regions, and Tmin consistently warms more during dry conditions. These findings reveal a saturation effect of precipitation on temperature and provide a framework for understanding precipitation-temperature interactions, with implications for refining climate model and assessing global warming.

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来源期刊
Geophysical Research Letters
Geophysical Research Letters 地学-地球科学综合
CiteScore
9.00
自引率
9.60%
发文量
1588
审稿时长
2.2 months
期刊介绍: Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.
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