Theories on Formation of an Anomalous Anticyclone in Western North Pacific during El Nino:A Review  

作　　者：Tim LI Bin WANG Bo WU Tianjun ZHOU Chih-Pei CHANG Renhe ZHANG 

机构地区：[1]Key Laboratory of Meteorological Disaster,Ministry of Education/Joint International Research Laboratory of Climate and Environmental Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing 210044,China [2]International Pacific Research Center and Department of Atmospheric Sciences,School of Ocean and Earth Science and Technology,University of Hawaii at Manoa,Honolulu,HI 96822,USA [3]Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]Naval Postgraduate School,Monterey,CA 93943,USA [6]Institute of Atmospheric Sciences,Fudan University,Shanghai 200433,China

出　　处：《Journal of Meteorological Research》2017年第6期987-1006,共20页气象学报（英文版）

基　　金：Supported by the National Key Research and Development Program(2017YFA0603802,2015CB453200);National Natural Science Foundation of China(41630423,41475084,41575043,41375095);United States National Science Foundation(AGS-1565653);Jiangsu Province Natural Science Foundation Key Project(BK20150062);Jiangsu Shuang-Chuang Team Fund(R2014SCT001);Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)

摘　　要：The western Noah Pacific anomalous anticyclone （WNPAC） is an important atmospheric circulation system that conveys El Nifio impact on East Asian climate. In this review paper, various theories on the formation and maintenance of the WNPAC, including warm pool atmosphere-ocean interaction, Indian Ocean capacitor, a combination mode that emphasizes nonlinear interaction between ENSO and annual cycle, moist enthalpy advecfion/Rossby wave modulation, and central Pacific SST forcing, are discussed. It is concluded that local atmosphere-ocean interaction and moist enthalpy advection/Rossby wave modulation mechanisms are essential for the initial development and maintenance of the WNPAC during El Nifio mature winter and subsequent spring. The Indian Ocean capacitor mechanism does not contribute to the earlier development but helps maintain the WNPAC in El Nifio decaying summer. The cold SST anomaly in the western North Pacific, although damped in the summer, also plays a role. An inter- basin atmosphere-ocean interaction across the Indo-Pacific warm pool emerges as a new mechanism in summer. In addition, the central Pacific cold SST anomaly may induce the WNPAC during rapid El Nifio decaying/La Nina developing or La Nifia persisting summer. The near-annual periods predicted by the combination mode theory are hardly detected from observations and thus do not contribute to the formation of the WNPAC. The tropical Atlantic may have a capacitor effect similar to the tropical Indian Ocean.The western Noah Pacific anomalous anticyclone （WNPAC） is an important atmospheric circulation system that conveys El Nifio impact on East Asian climate. In this review paper, various theories on the formation and maintenance of the WNPAC, including warm pool atmosphere-ocean interaction, Indian Ocean capacitor, a combination mode that emphasizes nonlinear interaction between ENSO and annual cycle, moist enthalpy advecfion/Rossby wave modulation, and central Pacific SST forcing, are discussed. It is concluded that local atmosphere-ocean interaction and moist enthalpy advection/Rossby wave modulation mechanisms are essential for the initial development and maintenance of the WNPAC during El Nifio mature winter and subsequent spring. The Indian Ocean capacitor mechanism does not contribute to the earlier development but helps maintain the WNPAC in El Nifio decaying summer. The cold SST anomaly in the western North Pacific, although damped in the summer, also plays a role. An inter- basin atmosphere-ocean interaction across the Indo-Pacific warm pool emerges as a new mechanism in summer. In addition, the central Pacific cold SST anomaly may induce the WNPAC during rapid El Nifio decaying/La Nina developing or La Nifia persisting summer. The near-annual periods predicted by the combination mode theory are hardly detected from observations and thus do not contribute to the formation of the WNPAC. The tropical Atlantic may have a capacitor effect similar to the tropical Indian Ocean.

关 键 词：western North Pacific anomalous anticyclone El Ni?o atmosphere–ocean interaction ENSO sea surface temperature Indian Ocean capacitor 

分 类 号：P732[天文地球—海洋科学]