东亚季风过渡带降水变化特征及物理机制研究进展  

Review of precipitation variations over the monsoon transitional zone in East Asia:characteristics and physical mechanisms

作　　者：赵威 张恒德 胡艺 ZHAO Wei;ZHANG Hengde;HU Yi(National Meteorological Center,Beijing 100081,China)

机构地区：[1]国家气象中心,北京100081

出　　处：《海洋气象学报》2022年第4期1-10,共10页Journal of Marine Meteorology

基　　金：国家气象中心青年基金项目(Q202202)。

摘　　要：东亚季风过渡带地处东亚夏季风北边缘附近,是典型的生态脆弱区与气候敏感带。东亚季风过渡带降水变化同时与东亚夏季风和中高纬西风带环流系统的变化密切关联,变异机理与典型季风区和干旱区降水有较大差别。目前专门针对东亚季风过渡带降水变异机理的研究还比较少。此文从东亚季风过渡带夏季降水的年际、年代际变化特征和物理机制出发,分别回顾热带关键区的海温异常和中高纬环流系统等对东亚季风过渡带夏季降水年际变化的影响,以及太平洋年代际振荡、大西洋多年代际振荡与气候系统外强迫对东亚季风过渡带降水年代际变化的贡献。最后,在进展回顾的基础上,展望定量区分外强迫和内部变率对东亚季风过渡带降水年代际变化的相对贡献等未来需进一步开展的研究方向。The monsoon transitional zone(MTZ)in East Asia,located near the north fringe of East Asian summer monsoon(EASM),is characterized by fragile ecosystem and climate sensitivity.The precipitation over the MTZ is not only significantly linked to variations of EASM,but also closely associated with the mid-and high-latitude westerlies.The precipitation variations over the MTZ in East Asia differ from those in classical monsoon region and arid region and are currently not fully investigated.Focused on the characteristics and physical mechanisms,this paper reviews the factors for the interannual variations of summer precipitation over the MTZ in East Asia such as sea surface temperature anomaly in tropical key areas and extratropical atmospheric teleconnections,etc.,and the potential impact of Pacific decadal oscillation(PDO),Atlantic multidecadal oscillation(AMO),and external forcings on interdecadal variations of precipitation over the MTZ.Based on the progress of the previous studies,we put forward several related issues that need to be further investigated in future,for instance,quantitatively distinguishing the relative contributions of external forcings and internal variabilities to the interdecadal variations of precipitation over the MTZ.

关 键 词：东亚夏季风 季风北边缘 降水变化 研究进展 

分 类 号：P461[天文地球—大气科学及气象学] P426.6