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The Role of the Qbo in the Inter-hemispheric Coupling of Summer Mesospheric Temperatures : Volume 10, Issue 10 (11/10/2010)

By Espy, P. J.

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Book Id: WPLBN0003989943
Format Type: PDF Article :
File Size: Pages 20
Reproduction Date: 2015

Title: The Role of the Qbo in the Inter-hemispheric Coupling of Summer Mesospheric Temperatures : Volume 10, Issue 10 (11/10/2010)  
Author: Espy, P. J.
Volume: Vol. 10, Issue 10
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Forkman, P., Murtagh, D., Fernández, S. O., Espy, P. J., & Stegman, J. (2010). The Role of the Qbo in the Inter-hemispheric Coupling of Summer Mesospheric Temperatures : Volume 10, Issue 10 (11/10/2010). Retrieved from

Description: Norwegian University of Science and Technology, Trondheim, Norway. Inter-hemispheric coupling between the polar summer mesosphere and planetary-wave activity in the extra-tropical winter stratosphere has recently been inferred using Polar Mesospheric Cloud (PMC) properties as a proxy for mesospheric temperature (Karlsson et al., 2007). Here we confirm these results using a ten-year time series of July mesospheric temperatures near 60° N derived from the hydroxyl (OH) nightglow. In addition, we show that the time/lagged correlation between these summer mesospheric temperatures and the ECMWF winter stratospheric temperatures displays a strong Quasi-Biennial Oscillation (QBO). The sign and phase of the correlation is consistent with the QBO modulation of the extra-tropical stratospheric dynamics in the Southern Hemisphere via the Holton-Tan mechanism (Holton and Tan, 1980). This lends strength to the identification of synoptic and planetary waves as the driver of the inter-hemispheric coupling, and results in a strong QBO modulation of the polar summer mesospheric temperatures.

The role of the QBO in the inter-hemispheric coupling of summer mesospheric temperatures

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