季内西太平洋副热带高压异常进退的数值模拟

用中科院大气所的ＩＡＰＡＧＣＭ模式，对海温和季内北太平洋副热带高压异常活动进行控制性试验，得到：西太平洋副高异常对热带西太平洋、南海、孟加拉湾的海温异常有两个月的滞后响应，且西太平洋副高异常和东太平洋副高异常总是相伴出现的，后者出现要早些；当上述海区ＳＳＴ正（负）异常时，５００ｈＰａ上来自东西两个方向的位势波在西太平洋汇集的位置要偏北（南），相应副高的位置也持续偏北（南），两者吻合很好；在上述海温异常作用下，当东亚高纬出现阻塞形势时，西太平洋位势波汇集的位置与阻高的位置关系密切。

海温异常对季内西太平洋副热带高压异常进退的数值模拟

本文用ＩＡＰ－ＡＧＣＭ模式，对海温进行控制性试验，得到以下结果：数值模拟表明，北太平洋副高的异常对热带西太平洋、南海、孟拉湾的海温异常有两个月的遥响应。西大副高异常和东太平洋副高异常总是相伴出现的，并且后者出现要早些。模拟还表明，当热带西太平洋、南海、孟加拉湾ＳＳＴ异常增加（减少）时，副高的位置持续偏北（南）。并且，当上述海区的ＳＳＴ异常增加（减少）时，在副热带地区有来自东西两个方向的位势波在西太平洋汇集，且汇集波的位置和副高的持续异常位置相吻合。

THE SIMULATION OF INTRASEASONAL ANOMALOUSLY ADVANCING AND RETREATING OF WESTERN PACIFIC SUBTROPICAL HIGH

Using IAP-AGCM, a model developed by the institute of atmospheric research, Academia Sinica,controlled numerital expertrients on SST and east Asian circulation have been performed and some conclusions have been reached as follows. The abnomality of subtropical high has a two-month remote lagging response to SSTA of the western tropical Pacific, the South China Sea and the Bay of Bengal. Theabnormality always appears in pair for the western Pacific subtrphal high and the eastern Pacific subtropical high, with the latter beginning earlier than the former. When the SST of the western trophalPacific, South China Sea and Bay of Bengal anomalously decreases (increases), the subtropical high iskept anomalously more t0 the south (north),consistently so is the location at which two zonal geopotential waves meet in the subtropical western Pacific. Under the action of the SSTA above and when ablocking pattern over east Asia continent appears, the assembling location of the joinin8 waves for thewestern Pacific is closely related to that of the blocking high, which is especially important to consistentabnormality of the subtropical high.