Influence of El Nio-Southern Oscillation in the mesosphere
作者单位：CAS key laboratory of Geospace EnviromentDepartment of Geophysics and Planetary ScienceUniversity of Science and Technology of China Atmospheric Chemistry Division and Advance Study ProgramNational Center for Atmospheric ResearchBoulderColoradoUSA Currently at Dpto.Fisica de la Tierra ⅡUniversidad Complutense de MadridSpain Center for Atmospheric SciencesHampton UniversityHamptonVirginiaUSA NASA Langley Research CenterHamptonVirginiaUSA Department of PhysicsColorado State UniversityFort CollinsColoradoUSA
会议名称：《中国空间科学学会空间物理学专业委员会第十五届全国日地空间物理学研讨会》
会议日期：2013年
学科分类：07[理学] 070802[理学-空间物理学] 070601[理学-气象学] 0708[理学-地球物理学] 0706[理学-大气科学]
摘 要：Using the middle atmosphere temperature datasets,observed by the Sounding of the Atmosphere using Broadband Emission Radiometry(SABER)between 2002 and 2012,and simulated by the Whole Atmospheric Community Climate Model version 3.5(WACCM3.5)between 1953 and 2005,we studied the influence of the El Nio-Southern Oscillation(ENSO)on the middle atmosphere temperature during the Northern Hemisphere *** the first time,a significant winter temperature response to ENSO in the middle mesosphere is observed,with an anomalous warming of.0K/MEI(Multivariate ENSO Index)over the tropics and anomalous cooling of2.0 K/MEI over the Northern Hemisphere middle *** observed temperature responses to ENSO in the stratosphere are opposite to those in the mesosphere,in agreement with previous *** temperature responses to ENSO observed by SABER show remarkably similar patterns as those simulated by WACCM3.5 *** analysis of WACCM residual mean meridional circulation response to ENSO reveals a significant downwelling in the tropical mesosphere and upwelling in the mid and high latitudes during the warm ENSO event,which is driven by the anomalous eastward wave forcing contributed from the combination of planetary wave EP flux divergence and gravity wave drag in the mesospheric middle latitudes.