全球春-秋季风降水的年际变化主模态时空特征  

Spatial-Temporal Characteristics of Interannual Variability of Global Monsoon Spring-Autumn Precipitation Modes

作　　者：秦岭[1] 黄菲[1,2] 许士斌[1] 王宏[1] QIN Ling;HUANG Fei;XU Shi-Bin;WANG Hong(Key Laboratory of Physical Oceanography/CIMST,Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China;Ningbo Collaborative Innovation Center of Nonlinear Hazard System of Ocean and Atmosphere, Ningbo University, Ningbo 315211, China)

机构地区：[1]中国海洋大学物理海洋教育部重点实验室,海洋高等研究院,山东青岛266100 [2]宁波大学宁波市非线性海洋和大气灾害系统协同创新中心,浙江宁波315000

出　　处：《中国海洋大学学报（自然科学版）》2020年第10期11-18,共8页Periodical of Ocean University of China

基　　金：国家重点研究发展计划项目(2019YFA0607004);国家自然科学基金项目(41575067)资助。

摘　　要：本文用季风区降水的年较差来表征季风的强度,对全球季风的春-秋季风降水强度年际变化的主模态进行了分析。研究表明,春-秋季风降水强度的年际变化主要体现在前两个模态的时空变化中,累积方差贡献为19.4%。第一模态为热带太平洋模态,体现了热带太平洋上的季风降水特征,这一模态主要受到ENSO事件的影响,特别是超强厄尔尼诺事件的衰减年对应着春季衰减的厄尔尼诺型海表温度异常和秋季发展的拉尼娜型海表温度异常,进而导致热带太平洋上出现较强的春-秋季风降水的反差。第二模态为热带大西洋模态,主要体现了热带大西洋上的季风降水特征,这一模态主要受到大西洋Nino的影响。The intensity of monsoon is represented by the annual range of precipitation over the monsoon domain,and the characteristics of interannual variation of global monsoon spring-autumn precipitation mode is analyzed.The first two leading modes principally explained the interannual variation of the global spring-autumn monsoonal precipitation,with an accumulated variance contribution of 19.4%.The first mode is named as tropical Pacific mode,which presented the characteristics of spring-autumn monsoon precipitation over tropical Pacific.This mode is mainly influenced by El Nino-Southern Oscillation(ENSO)events,especially the extreme El Nino events.The strong contrast of spring-autumn monsoon precipitation over tropical Pacific due to the responding decaying El Nino-like sea surface temperature(SST)anomaly in boreal spring and developing La Nina-like SST in boreal autumn during the decaying years of extreme El Nino events.The second mode is named as tropical Atlantic mode and presents the spring-autumn monsoon precipitation over tropical Atlantic.This mode is mainly influenced by Atlantic Nino events.

关 键 词：全球季风 春-秋季风降水 EOF ENSO 大西洋Nino 

分 类 号：P462.4[天文地球—大气科学及气象学]