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Diverse Dynamical Response to Orographic Gravity Wave Drag Hotspots - A Zonal Mean Perspective

Sacha, Petr and Kuchar, Ales and Eichinger, Roland and Pisoft, Petr and Jacobi, Christoph and Rieder, Harald E. (2021) Diverse Dynamical Response to Orographic Gravity Wave Drag Hotspots - A Zonal Mean Perspective. Geophysical Research Letters, 48 (e2021G), pp. 1-11. Wiley. doi: 10.1029/2021GL093305. ISSN 0094-8276.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL093305


In the extratropical atmosphere, Rossby waves (RWs) and internal gravity waves (GWs) propagating from the troposphere mediate a coupling with the middle atmosphere by influencing the dynamics therein. In state-of-the-art chemistry-climate models (CCMs), RW effects are well resolved while the majority of GW effects have to be parameterized. Here, we analyze orographic GW (OGW) interaction with resolved dynamics in a comprehensive CCM on daily time scales. For this, we apply a recently developed method of strong OGW drag event composites for three pronounced northern hemisphere OGW hotspots. We show that strong OGW drag events are associated with anomalous resolved wave propagation in the stratosphere. Causal links are inferred from previously published work and are supported by the anomalies in zonal circulation and wave activity tendencies. The nature of these anomalies varies depending on the hotspot region, which underlines the parameterized OGW-resolved dynamics interaction being a two-way process.

Item URL in elib:https://elib.dlr.de/144030/
Document Type:Article
Title:Diverse Dynamical Response to Orographic Gravity Wave Drag Hotspots - A Zonal Mean Perspective
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Sacha, PetrCharles Univ., Prague, CRUNSPECIFIED
Kuchar, AlesInstitute for Meteorology, Universität Leipzighttps://orcid.org/0000-0002-3672-6626
Eichinger, RolandDLR, IPAhttps://orcid.org/0000-0001-6872-5700
Pisoft, PetrCharles Univ., Prague, CRUNSPECIFIED
Jacobi, ChristophInstitute for Meteorology,University Leipzig, GermanyUNSPECIFIED
Rieder, Harald E.Institute of Meteorology and Climatology, University of Natural Resources and Life Sciences, Vienna (BOKU)UNSPECIFIED
Date:16 June 2021
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-11
Keywords:orographic gravity wave parameterization, stratospheric dynamics, chemistry-climate model
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Eichinger, Roland
Deposited On:30 Sep 2021 14:58
Last Modified:01 Oct 2021 12:10

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