大气科学2025，Vol.49Issue(2)：325-336,12.DOI:10.3878/j.issn.1006-9895.2304.23030
东北亚地区冷涡活动特征及其影响期间我国东北暖季降水分布
Characteristics of Cold Vortexes in Northeast Asia and Their Impacts on Precipitation Distribution of Warm Seasons over Northeast China
摘要
Abstract
This study identifies and tracks 3730 CVs(cold vortexes)in Northeast Asia from 2000 to 2019,including"short duration"CVs lasting[6 h,24 h)and[24 h,48 h),as well as traditional northeast CVs lasting at least 48 h.It examines differences in the spatial and temporal distribution,intensity,and scale of CVs with different durations,along with their impact on precipitation in Northeast China during warm seasons.The results show the following:(1)CVs lasting[6 h,24 h)are the most common,accounting for about 60%,while traditional CVs are the least common,at about 15%.(2)CVs demonstrate considerable interannual and intermonthly variations,with most occurring from May to August.However,CVs with different durations peak in different months.(3)The high occurrences of CV centers with durations of[6 h,24 h),[24 h,48 h),and≥48 h appear in the northeast corner,northeast quadrant,and central part of the study region,respectively.Initial CV centers mainly occur near the western boundary between 45°and 55°N.CVs lasting[6 h,24 h)and[24 h,48 h)frequently emerge in the northeast quadrant and north-central part,respectively.They are typically found near the eastern boundary of the region north of 40°N.(4)CVs with longer durations exhibit stronger centers and larger sizes.They are also stronger and larger during cold seasons compared to warm seasons.(5)Under CV conditions,the average contribution of both total precipitation and short-duration heavy precipitation exceeds 60%,with the latter being significantly larger.Longer-lasting CVs correspond to higher precipitation ratios.The spatial distributions of total precipitation and short-time heavy precipitation under different CV durations present remarkable differences.关键词
冷涡/不同持续时间/降水/暖季/东北/东北亚地区Key words
Cold vortex/Different duration/Precipitation/Warm seasons/Northeast China/Northeast Asia分类
大气科学引用本文复制引用
黄丽君,崔晓鹏,陈力强..东北亚地区冷涡活动特征及其影响期间我国东北暖季降水分布[J].大气科学,2025,49(2):325-336,12.基金项目
中国气象局沈阳大气环境研究所基本科研业务费重点项目2020SYIAEZD4 Funded by Key Project of Basic Scientific Research of Institute of Atmospheric Environment,China Meteorological Administration(Grant 2020SYIAEZD4) （Grant 2020SYIAEZD4）
