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The role of the QBO...
The role of the QBO in the inter-hemispheric coupling of summer mesospheric temperatures
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- Espy, P. J. (författare)
- Norges teknisk-naturvitenskapelige universitet (NTNU),Norwegian University of Science and Technology (NTNU)
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- Fernandez, S. O. (författare)
- Norges teknisk-naturvitenskapelige universitet (NTNU),Norwegian University of Science and Technology (NTNU),Universidad de Cantabria,University of Cantabria
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- Forkman, Peter, 1959 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Murtagh, Donal, 1959 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Stegman, Jacek (författare)
- Stockholms universitet,Meteorologiska institutionen (MISU),Stockholm University
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(creator_code:org_t)
- 2011-01-17
- 2011
- Engelska.
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Ingår i: Atmospheric Chemistry and Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 11:2, s. 495-502
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https://www.atmos-ch...
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https://doi.org/10.5...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- 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 degrees 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.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Nyckelord
- quasi-biennial oscillation
- thermal
- hydroxyl airglow
- solar-activity
- semidiurnal tide
- mesopause circulation
- structure
- general-circulation
- middle atmosphere
- lower thermosphere
- large-scale
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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