The dominant warming season shifted from winter to spring in the arid region of Northwest China

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

npj Climate and Atmospheric Science Pub Date : 2024-08-03 DOI:10.1038/s41612-024-00724-z

Fan Sun, Yupeng Li, Yaning Chen, Gonghuan Fang, Weili Duan, Baofu Li, Zhi Li, Xingming Hao, Yuhai Yang, Xueqi Zhang

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Abstract

The arid region of Northwest China (ARNC) has experienced a significantly higher warming rate than the global average and exhibits pronounced seasonal asymmetry, which has important implications for the region’s water-dependent systems. To understand the spatiotemporal patterns and driving mechanisms of seasonal asymmetric warming in the ARNC, we investigated seasonal changes in temperature rise and their underlying causes based on station and reanalysis data. We found that the dominant season of temperature increase shifted from winter to spring. The contribution of spring warming to the total temperature increase rose from −5%–7% to 58%–59%, while the contribution of winter warming decreased from 60%–75% to −4%–9%. However, the mechanisms underlying spring warming and winter cooling differ. An increase in solar radiation caused by a decrease in cloud cover (R = −0.64) was the main reason for spring warming, while a strengthening Siberian High primarily drove winter cooling.

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中国西北干旱地区的主要升温季节从冬季转为春季

中国西北干旱区（ARNC）的变暖速度明显高于全球平均水平，并表现出明显的季节不对称性，这对该地区依赖水的系统具有重要影响。为了了解 ARNC 季节性非对称变暖的时空模式和驱动机制，我们基于站点和再分析数据研究了气温上升的季节变化及其内在原因。我们发现，气温上升的主要季节从冬季转移到了春季。春季变暖对总气温上升的贡献率从-5%-7%上升到58%-59%，而冬季变暖的贡献率则从60%-75%下降到-4%-9%。不过，春季变暖和冬季变冷的机理有所不同。云量减少导致太阳辐射增加（R = -0.64）是春季变暖的主要原因，而西伯利亚高纬度地区的增强则是冬季降温的主要原因。

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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.