Spatially Distinct Effects of Different Types of El Niño in Developing Summer on Heat Extremes in China

IF 3.5 3区地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES

International Journal of Climatology Pub Date : 2025-03-17 DOI:10.1002/joc.8836

Tiejun Xie, Ting Ding, Ji Wang, Hui Gao, Yingjuan Zhang, Wenrong Bai

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Abstract

The effect of El Niño on summer heat extremes in China has been a topic of previous studies, but the effects of different types of El Niño in developing summer on heat extremes in China have not been conclusive. We examined the effects of different types of El Niño in developing summer on heat extremes in China and found that there are spatial differences under different El Niño types. The developing eastern Pacific (EP) El Niño favours summer heat extremes from North China to central China and decreases them in southeastern China. The developing mixed-type Pacific (MP) El Niño decreases summer heat extremes in east-central China between 29°N and 35°N. The developing central Pacific (CP) El Niño increases summer heat extremes in east-central China between 29°N and 37°N and decreases them in southern China. The physical mechanisms underlying the above spatially distinct effects are clarified through circulation and localised key climatic factors. Thus, the predictability of summer heat extremes in China can be improved based on judging the different El Niños in developing conditions.

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不同类型El Niño夏季发展对中国极端高温事件的空间差异影响

El Niño对中国夏季极端高温的影响一直是前人研究的主题，但不同类型的El Niño对中国夏季极端高温的影响尚无定论。研究了不同El Niño类型对中国夏季高温极端事件的影响，发现不同El Niño类型下存在空间差异。发展中的东太平洋El Niño有利于华北至华中地区的夏季极端高温事件，减少了中国东南部的极端高温事件。发展中的混合型太平洋厄尔尼诺Niño减少了中国中东部29°N ~ 35°N之间的夏季极端高温。发展中的中太平洋El Niño增加了中国中东部29°N ~ 37°N之间的夏季极端高温事件，减少了中国南方的极端高温事件。通过环流和局地关键气候因子阐明了上述空间差异效应背后的物理机制。因此，通过判断不同El Niños的发展条件，可以提高中国夏季极端高温事件的可预测性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Climatology 地学-气象与大气科学

CiteScore

7.50

自引率

7.70%

发文量

417

审稿时长

4 months

期刊介绍： The International Journal of Climatology aims to span the well established but rapidly growing field of climatology, through the publication of research papers, short communications, major reviews of progress and reviews of new books and reports in the area of climate science. The Journal’s main role is to stimulate and report research in climatology, from the expansive fields of the atmospheric, biophysical, engineering and social sciences. Coverage includes: Climate system science; Local to global scale climate observations and modelling; Seasonal to interannual climate prediction; Climatic variability and climate change; Synoptic, dynamic and urban climatology, hydroclimatology, human bioclimatology, ecoclimatology, dendroclimatology, palaeoclimatology, marine climatology and atmosphere-ocean interactions; Application of climatological knowledge to environmental assessment and management and economic production; Climate and society interactions