edu.ucar.opensky::articles:10436 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T14:52:29.218183 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7xw4k8m Responses of mesosphere and lower thermosphere temperatures to gravity wave forcing during stratospheric sudden warming 2010-05-06T00:00:00Z publication https://n2t.org/ark:/85065/d7xw4k8m https://doi.org/10.1029/2009GL042351 Yamashita, Chihoko author Liu, Hanli author Chu, X. author UCAR/NCAR - Library publisher We examine the responses of the mesosphere and lower thermosphere (MLT) temperatures to gravity waves (GWs) during stratospheric sudden warming (SSW) using TIME-GCM through modifying GW parameters. Our study confirms that the height of GW forcing region is mainly determined by GW amplitude and wavelength, and its vertical depth is closely tied to the spectral width of GW phase speed. The GW forcing controls the pattern and strength of residual circulation and thereby the characteristics of the MLT cooling and warming regions. The planetary wave (PW) forcing in the MLT also affects the vertical depth and magnitude of MLT temperature anomalies through further modifying the residual circulation. These PWs in MLT are likely generated in-situ by the GW forcing at high latitudes. Therefore, the mechanisms of GW controlling the MLT temperature during a SSW are directly through GW forcing and indirectly through generating PWs in-situ. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication An edited version of this paper was published by AGU. Copyright 2010 American Geophysical Union. None eng geoscientificInformation