气象2025，Vol.51Issue(7)：830-839,10.DOI:10.7519/j.issn.1000-0526.2025.041501
基于高分辨率资料的东北冷涡气候特征
Climate Characteristics of Northeast Cold Vortex Based on High Resolution Data
摘要
Abstract
Based on ERA5 hourly reanalysis data of atmospheric circulation field with horizontal resolution of 0.25° ×0.25°,geopotential height data and temperature,the northeast cold vortex process and its cli-mate change characteristics from 1979 to 2023 are analyzed.The results reveal that there are more north-east cold vortexes in the early 1990s and mid-2000s,and relatively fewer in the 2010s.The frequency of northeast cold vortex shows higher in the warm season than in the cold season,with the highest in June and the lowest in March.Its average duration is 4 days,with the shortest duration in April and the longest duration in January.The northeast cold vortex is mostly generated in the range of 45°—60°N,100°—120°E and dies out within 40°—55°N near 140°E.The center of the northeast cold vortex is mainly concentrated within 45°—55°N and 115°—135°E.The northeast cold vortex mainly moves towards the east and south-east.To the east of 120°E,the average intensity of the cold vortex is stronger and weaker to the west.The intensity distribution of the northeast cold vortex within the year is stronger in the cold season than in the warm season.The intensity difference between the grids in the analysis area is the largest in March,and the smallest in June.The annual average intensity and circulation of northeast cold vortex show a sig-nificant weakening trend from 1979 to 2023.There is a significant negative correlation between the intensi-ty of the northeast cold vortex and the temperature in most months in Northeast China,but a significant positive correlation with precipitation in April and June.关键词
东北冷涡/高分辨率/气候特征Key words
northeast cold vortex/high resolution/climate characteristic分类
天文与地球科学引用本文复制引用
刘玉莲,康恒元,赵玲..基于高分辨率资料的东北冷涡气候特征[J].气象,2025,51(7):830-839,10.基金项目
黑龙江省自然科学基金联合引导项目(LH2019D013)、国家重点研发计划(2018YFA0605603)、国家自然科学基金项目(41771067)和黑龙江省气象局创新发展项目(HQZC2025023)共同资助 （LH2019D013）
