大气科学2017，Vol.41Issue(1)：213-226,14.DOI:10.3878/j.issn.1006-9895.1601.15259
春季赤道印度洋纬向—垂直环流的变化特征及其与Walker环流的关系
Variations of the Spring Equatorial Indian Ocean Zonal-Vertical Circulation and Its Correlation with the Walker Circulation
摘要
Abstract
Based on the 20CR reanalysis dataset and the sea surface temperature (SST) dataset provided by NOAA,seasonal differences and variations of the equatorial Indian Ocean zonal-vertical circulation (EIOZVC) and its correlation with the Walker circulation are investigated.First,structures of the EIOZVC in the four seasons are analyzed,and the results suggest that the EIOZVC in a strictly zonal direction only appears in the spring and autumn.Further studies on variations of the EIOZVC in the spring show that the intensity of the EIOZVC and its variability increased during the period of 1951-2010,while the position of the EIOZVC center experienced a remarkable interdecadal variation:prior to 1981,the EIOZVC center shifted westward;however,it shifted eastward after 1981.There is also a noticeable interdecadal variation in the correlation between the EIOZVC and the Walker circulation in the spring.No high correlation is found between them prior to 1981,whereas the two circulations are found to be highly correlated after 1981,The relationship between the spring EIOZVC and seasonal mean SSTs over the Indian and Pacific Oceans also exhibits different patterns between the two periods,indicating that the EIOZVC is influenced primarily by the Pacific ENSO-like SST signals in the previous winter and the subsequent spring after the year of 1981.Before 1981,however,the EIOZVC was mainly influenced by the equatorial eastern Indian Ocean SSTs.关键词
赤道印度洋纬向—垂直环流/变化特征/相关关系Key words
Equatorial Indian Ocean zonal-vertical circulation (EIOZVC)/Variation/Correlation分类
天文与地球科学引用本文复制引用
岳如画,徐海明..春季赤道印度洋纬向—垂直环流的变化特征及其与Walker环流的关系[J].大气科学,2017,41(1):213-226,14.基金项目
国家自然科学基金项目41275094、41490643、41575077,国家重大科学研究计划项目2012CB955602,江苏高校优势学科建设工程项目(PAPD),江苏省高校“青蓝工程” （PAPD）
National Natural Science Foundation of China (Grants 41275094,41490643,and 41575077),National Basic Research Program of China (Grant 2012CB955602),A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD),Qinglan Project of Jiangsu Province （Grants 41275094,41490643,and 41575077）
