论文部分内容阅读
本文利用欧洲中期数值天气预报中心(ECMWF)西北太平洋上空(25°—35°N,110°—180°)850 hPa客观分析的西风分量,计算了1986/1987厄尔尼诺期间的西风强度.结果表明1986年12月—1987年5月西风的累计强度比1986/1987厄尔尼诺前后诸年份同期的西风更强,这种强化与历次厄尔尼诺期间西北太平洋副热带高压的加强是一致的,都反映了哈德莱环流的强化.为了探讨大气环流发生这种变化的原因,作者利用中美海气观测期间的海洋资料,说明了热带两太平洋东部对低纬度大气异常的加热和西部边界流向中纬度海洋输送热量的减少是两个十分重要的原因.
In this paper, the westerly winds of El Nino during 1986/1987 were calculated by using the objective analysis of the west wind component at 850 hPa (25 ° -35 ° N, 110 ° -180 °) over the western North Pacific of the European Center for Mid-Value Weather Forecasting (ECMWF) The cumulative intensity of the westerly wind from December to May 1987 is stronger than the westerly winds of the same period of 1986/1987 before and after El Niño. This strengthening is consistent with the strengthening of the Northwest Pacific subtropical high over the El Niño period, and both reflect the Hadley circulation In order to explore the reasons for this change in the atmospheric circulation, the authors used the oceanographic data during the Sino-US sea-air observation period to show whether the heat transfer to the low latitudes in the eastern tropical Pacific Ocean and the heat transfer to the mid-latitude off the western boundary are Two very important reasons.