北太平洋500hPa高度场与赤道东太平洋海温、南方涛动的关联

CORRELATION BETWEEN 500hPa HEIGHT FIELD OF NORTH PACIFIC OCEAN AND THE SEA TEMPERATURE AND SOUTHERN OSCILLATION(SO) OF EAST EQUATORIAL PACIFIC OCEAN

本文采用经验正交函数（EOF）展开和波谱分析方法，讨论1953年1月至1977年12月北太平洋500hPa高度场分布特征及其演变周期，并讨论它们分别与赤道东太平洋海温、南方涛动指数关系。计算结果表明，北太平洋500hPa高度场的年际变化异常型主要为高度场大范围偏高（偏低），此异常型具有60个月（5年）、40个月（约3．3年）和20个月（约1．7年）显著周期，且在60个月、40个月周期上同赤道东太平洋海温、南方涛动指数有显著关联；其次为该高度场北部偏低（偏高）、南部偏高（偏低）的异常型，其显著周期为30个月（2．5年）、24个月（2．年）及15个月（约1．3年），且在两年周期上同赤道东太平洋海温、南方涛动指数有显著关联。

In this paper are discussed the distribution characteristics and its period of evolution of 500hPa height field over the North Pacific ocean from January, 1953 to December, 1977 and their connection with sea temperature and southern oscillation index (SOI) over the North Equatorial Pacific Ocean by means of the expansion of empirical orthdox function (EOF) and spectrum analysis, with the calculation results that the annual evolution ary anomaly shows firstly that the height field is on the extra-high (extra-low) side with great extent. The anomaly has pronounced periods of 60 months (5 years), 40 months (ahout 3. 3 years) and 20 months (about 1. 7 years), and has a marked connection with sea temperature and southern oscillation index at the East Equatorial Pacific Ocean on the period of 60 months and 40 months. Secondly the annual evolutionary anomaly shows that the height field is higher(lower) on the southern side, its pronounced period being 30 months (2. 5 years), 24 months and 15 months (about 1. 3 years) respectively, and furthermore having a marked connection with sea temperature and southern oscillation index (SOI) in the East Equatorial Pacific Ocean on the period of two years.