Climatology Characteristics of Walker Circulation in East-west Direction in the Equatorial Tropical Pacific Ocean  

赤道热带太平洋东西向Walker环流的气候学特征(英文)

作　　者：周丽雅[1] 

机构地区：[1]南京大学大气科学学院,江苏南京210000

出　　处：《Meteorological and Environmental Research》2010年第6期12-14,共3页气象与环境研究（英文版）

摘　　要：By using OLR monthly average data which was observed by American NOAA satellite and 500 hPa ω monthly average data of NCEP reanalysis,the indexes which represented the equatorial longitudinal circulation characteristics were defined. According to the intensity,scope and distribution characteristics of longitudinal circulation in the tropical equator area,the indexes which represented the intensity,position and scope climate characteristics of longitudinal circulation in the equatorial Pacific Ocean were diagnosed and studied. The results showed that the annual variation and interannual variation characteristics of Walker circulation in east-west direction in the equatorial Pacific Ocean were that the intensity and scope existed 5 and 15-16 years oscillatory periods,and the position had 4,12 years oscillatory periods.By using OLR monthly average data which was observed by American NOAA satellite and 500 hPa ω monthly average data of NCEP reanalysis,the indexes which represented the equatorial longitudinal circulation characteristics were defined. According to the intensity,scope and distribution characteristics of longitudinal circulation in the tropical equator area,the indexes which represented the intensity,position and scope climate characteristics of longitudinal circulation in the equatorial Pacific Ocean were diagnosed and studied. The results showed that the annual variation and interannual variation characteristics of Walker circulation in east-west direction in the equatorial Pacific Ocean were that the intensity and scope existed 5 and 15-16 years oscillatory periods,and the position had 4,12 years oscillatory periods.

关 键 词：Equator longitudinal vertical circulation OLR Climate characteristic China 

分 类 号：P434[天文地球—大气科学及气象学]