夏季北大西洋涛动与我国天气气候的关系

利用1873-1995年北半球月平均海平面气压（SLP）资料，计算了夏季北大西洋涛动指数（NAOI）。通过NAOI与我国降水、气温和北半球球流5的相关计算以及强、弱小涛动年北半球环流异常的合成分析，发现，夏季强NAOI年，副高偏强，我国西南地区降水偏少，易出现一类和二类雨型；我国大部分地区气温明显偏高，此外，还研究了多时间尺度上，NAOI与东亚夏季风的关系，结果表明，夏季NAOI与东亚夏季风在年际、年代际、基本态尺度上都存在显著相关，强NAOI年，对应是强东亚夏季风特征，当NAOI处高（低）基本态时，夏季风处于高（低）基本态。

THE NORTH ATLANTIC OSCILLATION IN RELATION TO SUMMER WEATHER-CLIMATE ANOMALY IN CHINA AND EAST ASIAN SUMMER MONSOON

By using 1873~1995 monthly mean northern sea level pressure we have calculated the summer North Atlantic Oscillation Index(NAOI).Through calculation for the correlation coefficients between the NAOI and the geopotential height and the anomalous composite of the strong or weak NAOI,it is found that intense NAOI in summer is associated with stronger subtropical high ,meanwhile the summer rainfall is less than normal in the southwest segment and summer temperature is higher on a large scale.Finally,the relationship between summer NAOI and East Asian summer monsoon in multiple temporal scale is documented,indicating that the interannual and secular variation feature of summer NAOI is highly related to the East Asian summer monsoon.Intense summer NAOI is associated with stronger East Asian summer monsoon.Whe summer NAOI is in a high(low)base state,East Asian summer monsoon is in a high(low)base state.