气象2025，Vol.51Issue(7)：876-890,15.DOI:10.7519/j.issn.1000-0526.2025.060601
2024/2025年冬季北半球大气环流及对中国冬季气候异常的影响
The Northern Hemisphere Atmospheric Circulation in the 2024/2025 Winter and Its Impact on the Winter Climate Anomalies in China
摘要
Abstract
In the winter of 2024/2025,the mean temperature in China was 0.4℃ higher than normal with significant intra-seasonal variations.Average precipitation was 41.1％lower than normal,and the regions south of the Yangtze River experienced persistently less precipitation.Atmospheric circulation patterns in the mid-to-high latitudes over Eurasia have shown staged differences in this winter.In December 2024,the Arctic Oscillation was in a negative phase and the East Asian trough and Siberian high were stronger than usual.All the three got weakened in January 2025 and then strengthened again in February.Especially in February,the negative phase of the Arctic Oscillation reached the strongest stage of this winter while the activity of Eurasian blocking high was significantly enhanced.These factors collectively triggered an obvious shift in the temperature of China from warmer to colder conditions.In the 2024/2025 winter,the low-latitude atmosphere responded significantly to the La Niña-type sea surface temperature anomalies in the equatorial central-eastern Pacific.Persistent cyclonic circulation anomalies dominated the lower tropo-sphere from the Philippines to the South China Sea,while the regions south of the Yangtze River in China remained consistently influenced by northerly wind anomalies.Coupled with persistently weak activity of the India-Burma trough,the influences of multiple circulation conditions led to sustained moisture trans-port deficits and significantly reduced precipitation in eastern China,particularly in the southern part.关键词
东亚冬季风/季节内变化/南方降水/拉尼娜/西伯利亚高压Key words
East Asian winter monsoon/intra-seasonal variation/precipitation in southern China/La Niña/Siberian high分类
天文与地球科学引用本文复制引用
赵玉衡,丁婷..2024/2025年冬季北半球大气环流及对中国冬季气候异常的影响[J].气象,2025,51(7):876-890,15.基金项目
国家自然科学基金项目(42175048、42405045、42475019、U2142207)、中国气象局气象能力提升联合研究专项(24NLTSZ001、23NLTSZ003)、中国气象局创新发展专项(CXFZ2025J025)、中国长江电力股份有限公司项目(2423020054)和国家气候中心创新团队(NCCCXTD003)共同资助 （42175048、42405045、42475019、U2142207）
