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Infrasound from tropospheric sources: Impact on mesopause temperature?

Pilger, Christoph and Bittner, Michael (2009) Infrasound from tropospheric sources: Impact on mesopause temperature? Journal of Atmospheric and Solar-Terrestrial Physics, 71, pp. 816-822. Elsevier. DOI: 10.1016/j.jastp.2009.03.008 ISSN 1364-6826

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Abstract

Temperature fluctuations with a 3-6 day modulation are frequently observed in the mesopause height region (around 80-90 kilometer) especially from OH*-airglow measurements. The northern hemisphere wintertime appearance of these fluctuations is often explained by tropospheric planetary wave activity (4- and 5-day-wave) propagating up to the mesopause, but the physical mechanism leading to these variations in summertime is still under discussion. Planetary waves are strongly influenced by stratospheric winds. Therefore, the westward winds in the northern hemisphere summertime normally prevent the propagation through the stratosphere. One effect that might be contributing to such summertime temperature fluctuations in the mesopause altitude region could be acoustic heating. Infrasound, which is known to be generated by low pressure areas or thunderstorm cells, propagates more or less unhindered into the upper atmosphere and deposits heat in this region. It is speculated that the oftentimes about weekly variation of low pressure areas due to planetary wave activity in the troposphere can therefore be a potential source mechanism for mesopause temperature fluctuations through infrasound as a transporting mechanism.

Item URL in elib:https://elib.dlr.de/60815/
Document Type:Article
Title:Infrasound from tropospheric sources: Impact on mesopause temperature?
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pilger, Christophchristoph.pilger (at) dlr.deUNSPECIFIED
Bittner, Michaelmichael.bittner (at) dlr.deUNSPECIFIED
Date:20 March 2009
Journal or Publication Title:Journal of Atmospheric and Solar-Terrestrial Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:71
DOI :10.1016/j.jastp.2009.03.008
Page Range:pp. 816-822
Publisher:Elsevier
ISSN:1364-6826
Status:Published
Keywords:Infrasound, Acoustic Heating, Planetary Waves, Mesopause airglow
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Climate and Atmospheric Products
German Remote Sensing Data Center
Deposited By: Pilger, Christoph
Deposited On:16 Nov 2009 10:08
Last Modified:30 May 2019 22:05

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