厄尔尼诺对东亚大气环流和中国降水年际变异的影响:西北太平洋异常反气旋的作用
发布时间：2019-06-14 02:07
【摘要】：就有关厄尔尼诺通过西北太平洋异常反气旋影响东亚大气环流和中国降水年际变异的研究进展作了系统回顾,说明了与厄尔尼诺相关联的西北太平洋异常反气旋的形成机理以及对东亚大气环流和中国降水影响的物理过程.厄尔尼诺盛期时,热带西太平洋对流异常减弱造成的冷却异常,激发出大气Rossby波响应,导致了西北太平洋异常反气旋的产生.而热带西太平洋对流异常冷却的持续、西北太平洋局地海气相互作用以及热带印度洋和大西洋海温异常的持续等多种因子,导致了西北太平洋异常反气旋从厄尔尼诺盛期时的冬季持续到次年夏季.西北太平洋异常反气旋不仅对中国降水产生同期影响,也对厄尔尼诺次年夏季的中国降水产生滞后影响,导致中国南方降水异常偏多.本文也指出东亚大气环流和中国降水在拉尼娜冬半年不存在与厄尔尼诺相反的显著异常,说明了厄尔尼诺和拉尼娜对冬半年东亚大气环流和中国降水具有不对称影响.文中还讨论了厄尔尼诺的多样性及其影响、影响西北太平洋异常反气旋持续性的各因子与中国夏季降水异常的联系,并提出了一些需要进一步研究的问题.
[Abstract]:The research progress on the influence of El Ni 帽 o on the atmospheric circulation in East Asia and the interannual variation of precipitation in China through the abnormal anticyclone in the Northwest Pacific is reviewed systematically, and the formation mechanism of the abnormal anticyclone in the northwest Pacific associated with El Nino and the physical process of its influence on the atmospheric circulation in East Asia and precipitation in China are explained. In the peak period of El Ni 帽 o, the cooling anomaly caused by the weakening of convective anomaly in the tropical western Pacific excites the response of atmospheric Rossby wave, which leads to the occurrence of abnormal anticyclone in the northwest Pacific. However, the persistence of convective anomaly cooling in the tropical western Pacific, the local sea-air interaction in the northwest Pacific and the persistence of the tropical Indian Ocean and Atlantic SST anomalies lead to the continuation of the abnormal anticyclone in the northwest Pacific from winter to the summer of the following year. The abnormal anticyclone in the northwest Pacific not only affects the precipitation in China at the same time, but also has a lagging effect on the precipitation in China in the summer of the following year, which leads to the abnormal precipitation in southern China. It is also pointed out that there are no significant anomalies in East Asian atmospheric circulation and precipitation in China in the winter six months of La Nina, which indicates that El Ni 帽 o and La Nina have asymmetrical effects on East Asian atmospheric circulation and Chinese precipitation in winter half a year. The diversity of El Ni 帽 o and its influence are also discussed, and the relationship between the factors affecting the persistence of abnormal anticyclone in the northwest Pacific and the summer precipitation anomalies in China is also discussed, and some problems that need to be further studied are put forward.
【作者单位】： 复旦大学大气科学研究院;中国气象科学研究院;
【基金】：国家重点基础研究发展计划项目(编号:2015CB453203) 国家重点研发计划项目(编号:2016YFA0600602) 国家自然科学基金项目(批准号:41661144017)资助
【分类号】：P732;P461.2
[Abstract]:The research progress on the influence of El Ni 帽 o on the atmospheric circulation in East Asia and the interannual variation of precipitation in China through the abnormal anticyclone in the Northwest Pacific is reviewed systematically, and the formation mechanism of the abnormal anticyclone in the northwest Pacific associated with El Nino and the physical process of its influence on the atmospheric circulation in East Asia and precipitation in China are explained. In the peak period of El Ni 帽 o, the cooling anomaly caused by the weakening of convective anomaly in the tropical western Pacific excites the response of atmospheric Rossby wave, which leads to the occurrence of abnormal anticyclone in the northwest Pacific. However, the persistence of convective anomaly cooling in the tropical western Pacific, the local sea-air interaction in the northwest Pacific and the persistence of the tropical Indian Ocean and Atlantic SST anomalies lead to the continuation of the abnormal anticyclone in the northwest Pacific from winter to the summer of the following year. The abnormal anticyclone in the northwest Pacific not only affects the precipitation in China at the same time, but also has a lagging effect on the precipitation in China in the summer of the following year, which leads to the abnormal precipitation in southern China. It is also pointed out that there are no significant anomalies in East Asian atmospheric circulation and precipitation in China in the winter six months of La Nina, which indicates that El Ni 帽 o and La Nina have asymmetrical effects on East Asian atmospheric circulation and Chinese precipitation in winter half a year. The diversity of El Ni 帽 o and its influence are also discussed, and the relationship between the factors affecting the persistence of abnormal anticyclone in the northwest Pacific and the summer precipitation anomalies in China is also discussed, and some problems that need to be further studied are put forward.
【作者单位】： 复旦大学大气科学研究院;中国气象科学研究院;
【基金】：国家重点基础研究发展计划项目(编号:2015CB453203) 国家重点研发计划项目(编号:2016YFA0600602) 国家自然科学基金项目(批准号:41661144017)资助
【分类号】：P732;P461.2
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