Suppressed migrating diurnal tides in the mesosphere and lower thermosphere region during El Niño in northern winter and its possible mechanism
Abstract ∼ ∼ ∘ S–35∘ N) during El Niño winter contribute to the decreased DW1 tide. To evaluate the effect of the gravity waves (GWs) on the tide, the GW forcing is calculated as the GW drag weighted by the phase relation between DW1 GW drag and DW1 wind. The negative GW forcing in the tropical upper mesosphere would significantly suppress the MLT DW1 tide during El Niño winter. This tide–GW interaction could be a dominant mechanism for DW1 response in the MLT to El Niño. During El Niño winter, the increased ratio of the absolute and planetary vorticity (R) suppresses the waveguide and thus the DW1 amplitude in the subtropical mesosphere. However, the effect of the waveguide might play a secondary role due to its relatively weak response.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Suppressed migrating diurnal tides in the mesosphere and lower thermosphere region during El Niño in northern winter and its possible mechanism ; volume:22 ; number:12 ; year:2022 ; pages:7861-7874 ; extent:14
Atmospheric chemistry and physics ; 22, Heft 12 (2022), 7861-7874 (gesamt 14)
- Creator
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Cen, Yetao
Yang, Chengyun
Li, Tao
Russell III, James M.
Dou, Xiankang
- DOI
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10.5194/acp-22-7861-2022
- URN
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urn:nbn:de:101:1-2022062305244322037242
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:34 AM CEST
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Associated
- Cen, Yetao
- Yang, Chengyun
- Li, Tao
- Russell III, James M.
- Dou, Xiankang
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