1982-1983厄·尼诺年夏季北半球热带和副热带大气超长波能量分析
AN ANALYSIS OF THE ULTRA-LONGWAVE OF ENERGY FOR THE TROPICS AND SUBTROPICS IN THE NH DURING 1982-1983 EL NINO YEAR
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摘要: 统计分析表明,强厄·尼诺事件发生后,热带和北半球气温将升高、气温上升较海温滞后2个季节1。此外,夏季风主要系统(如副热带高压等)的加强也比海温增暖滞后1-2个季节2。可见,厄·尼诺对夏季大尺度环流和天气异常可能有一定的影响。作者曾以1982-1983年厄·尼诺事件为例,分析了这两个夏季大气环流的主要特征1),发现1983年热带副热带对流层上部南亚高压强,大洋中部槽(TUTT)加深;赤道东风急流减弱;副热带高压加强,热带大气平均温度升高等现象。Abstract: In this paper, the wave nu m ber spectra of energy have been analysed for the ultra-longwave in the tropics and subtropics of the Northern Hemisphere in the July, 1982 and 1983 by using ECMWF/WMO data. This study deals with subjects concerning the ultra-longwave energy characteristics and large-scale circulation relative to the energy varies during the summer in the El Nino year (1982-1983).
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