本文通过用IAP GCM所作的数值模拟研究了欧亚大陆中高纬度地区的外强迫在全球大气中激发的响应.结果清楚表明,同赤道地区的热源强迫一样,中高纬度地区的外强迫也可以在全球大气中产生低频遥响应;通过低频波列EAP,欧亚大陆中高纬度地区的寒潮异常可以对赤道中西太平洋地区的大气运动及全球大气环流有重要影响.对30—60天振荡的强迫激发来讲,地球大气的气候基本态是极为重要的,热带大气对于全球大气的低频振荡活动具有尤为突出的作用.
Through the numerical simulation by the IAP GCM, the atmospheric teleresponse caused by the external forcing over the Eurasian Continent middle-high latitude area is studied. It is revealed clearly that the external forcing in the middle-high latitude area can also bring about the low-frequency teleresponse in the global atmosphere as that excited by the tropical forcing; By the low-frequency EAP wave-train, the anomalous "cold wave" over the moddle-high latitude Eurasian Continent significantly affects the motion of the atmosphere in the equatorial center-western Pacific area and the global atmospheric general circulation. It is also indicated that the basic climatic state of the atmosphere is extremely important to stimulating the forcing of the 30- 60 day oscillation. The tropical atmosphere exerts especially important influence on the low-frequency oscillation in the global atmosphere.