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Influence of El Nino Southern Oscillation on the Mesospheric TemperatureUsing the middle atmosphere temperature data set observed by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) satellite experiment between 2002 and 2012, and temperatures simulated by the Whole Atmospheric Community Climate Model version 3.5 (WACCM3.5) between 1953 and 2005, we studied the influence of El Niño-Southern Oscillation (ENSO) on middle atmosphere temperature during the Northern Hemisphere (NH) wintertime. For the first time, a significant winter temperature response to ENSO in the middle mesosphere has been observed, with an anomalous warming of approximately 1.0 K/MEI (Multivariate ENSO Index) in the tropics and an anomalous cooling of approximately 2.0 K/MEI in the NH middle latitudes. The observed temperature responses to ENSO in the mesosphere are opposite to those in the stratosphere, in agreement with previous modeling studies. Temperature responses to ENSO observed by SABER show similar patterns to those simulated by the WACCM3.5 model. Analysis of the WACCM3.5 residual mean meridional circulation response to ENSO reveals a significant downwelling in the tropical mesosphere and upwelling in the NH middle and high latitudes during warm ENSO events, which is mostly driven by anomalous eastward gravity wave forcing in the NH mesosphere.
Document ID
20140001093
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Li, Tao
(China Scientific and Technical Univ. Anhui, China)
Calvo, Natalia
(National Center for Atmospheric Research Boulder, CO, United States)
Yue, Jia
(Hampton Univ. VA, United States)
Dou, Xiankang
(China Scientific and Technical Univ. Anhui, China)
Russell, J. M, III
(Hampton Univ. VA, United States)
Mlynczak, M. G.
(NASA Langley Research Center Hampton, VA, United States)
She, Chiao-Yao
(Colorado State Univ. Fort Collins, CO, United States)
Xue, Xianghui
(China Scientific and Technical Univ. Anhui, China)
Date Acquired
March 7, 2014
Publication Date
June 18, 2013
Publication Information
Publication: Geophysical Research Letters
Volume: 40
Issue: 12
Subject Category
Geophysics
Report/Patent Number
NF1676L-16387
Funding Number(s)
CONTRACT_GRANT: CSD 2007-00050
CONTRACT_GRANT: NNSFC 41074108
CONTRACT_GRANT: NSF AGS-1136082
CONTRACT_GRANT: NNSFC 41127901
CONTRACT_GRANT: NNSFC 41025016
WBS: WBS 370544
CONTRACT_GRANT: NNSFC 41121003
CONTRACT_GRANT: NNSFC 41225017
Distribution Limits
Public
Copyright
Other

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