中国海洋大学学报（自然科学版）2025，Vol.55Issue(8)：1-14,14.DOI:10.16441/j.cnki.hdxb.20240232
冬季湾流延伸体区海洋锋对温带气旋内上升气流的影响
The Influence of the Oceanic Front in Gulf Stream Extention Region on the Upward Airflow in Extratropical Cyclones in Winter
摘要
Abstract
Using the numerical results of community atmosphere model Version 5(CAM5),the influ-ence mechanism of the oceanic front in the gulf stream(GS)and its extension region(referred to as GS front)on the upward airflow in the extratropical cyclone is explored.In the control experiment,com-posite results of cyclonic turbulences appearing in the GS region show that when the cyclonic turbulence is located over the oceanic front,it develops rapidly,and two strong upward airflows appear in the south of the oceanic front and the north of the cyclonic turbulence center(near 50°N,north of the oceanic front).Through the energy budget analysis,it is found that when the center of the cyclonic turbulence reaches the oceanic front,eddy available potential energy(EAPE)and eddy kinetic energy(EKE)in the center and north of the turbulence are significantly enhanced,which is closely related to the heat and water va-por provided by the oceanic front.Then,the results of the comparative experiments of the strength of the oceanic front show that the influences of the oceanic front on EAPE and EKE equations are different before and when the cyclonic turbulence center reaches the oceanic front.Before the turbulence reaches the oceanic front,the oceanic front mainly enhances baroclinic generation term(a source term in the EAPE equation)in the north of the front by affecting eddy heat and water vapor transport to high lati-tudes,which provides energy for the development of EKE in the north side of the cyclonic turbulence center(also in the north side of GS front).When the cyclonic turbulence center reaches the oceanic front,the ascending motion and precipitation in the north of the turbulence center are greatly enhanced,which mainly enhances diabatic heating term(another source term in the EAPE equation)in the north of the turbulence and continues to promote the development of the turbulence.关键词
湾流区/海洋锋面/温带气旋/强上升流/涡动能量转换Key words
Gulf Stream region/oceanic front/extratropical cyclones/strong upward airflow/eddy energy conversion分类
天文与地球科学引用本文复制引用
韩子清,贾英来,吕东方..冬季湾流延伸体区海洋锋对温带气旋内上升气流的影响[J].中国海洋大学学报（自然科学版）,2025,55(8):1-14,14.基金项目
国家自然科学基金项目(41975065) （41975065）
泰山学者攀登计划项目(ZR2019ZD12)资助 Supported by the National Natural Science Foundation of China(41975065) （ZR2019ZD12）
the Taishan Panddeng Scholar Project(ZR2019ZD12) （ZR2019ZD12）
