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Mountain Wave Propagation under Transient Tropospheric Forcing: A DEEPWAVE Case Study

Portele, Tanja C. and Dörnbrack, Andreas and Wagner, Johannes S. and Gisinger, Sonja and Ehard, Benedikt and Pautet, Pierre-Dominique and Rapp, Markus (2018) Mountain Wave Propagation under Transient Tropospheric Forcing: A DEEPWAVE Case Study. Monthly Weather Review, 146 (6), pp. 1861-1888. American Meteorological Society. DOI: 10.1175/MWR-D-17-0080.1 ISSN 0027-0644

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Official URL: http://dx.doi.org/10.1175/MWR-D-17-0080.1

Abstract

The impact of transient tropospheric forcing on the deep vertical mountain wave propagation is investigated by a unique combination of in-situ and remote-sensing observations and numerical modeling. The temporal evolution of the upstream low-level wind follows approximately a cos2 shape and was controlled by a migrating trough and connected fronts. Our case study reveals the importance of the time-varying propagation conditions in the upper troposphere, lower stratosphere (UTLS). Upper-tropospheric stability, the wind profile as well as the tropopause strength affected the observed and simulated wave response in the UTLS. Leg-integrated along-track momentum fluxes (−MFtrack) and amplitudes of vertical displacements of air parcels in the UTLS reached up to 130 kN m−1 and 1500 m, respectively. Their maxima were phase-shifted to the maximum low-level forcing by ≈ 8 h. Small-scale waves (λx ≈ 20–30 km) were continuously forced and their flux values depended on wave attenuation by breaking and reflection in the UTLS region.

Item URL in elib:https://elib.dlr.de/119276/
Document Type:Article
Additional Information:Please note the AMS Copyright Policy, available under https://www.ametsoc.org/ams/index.cfm/publications/ethical-guidelines-and-ams-policies/ams-copyright-policy/
Title:Mountain Wave Propagation under Transient Tropospheric Forcing: A DEEPWAVE Case Study
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Portele, Tanja C.DLR, IPAUNSPECIFIED
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216
Wagner, Johannes S.DLR, IPAUNSPECIFIED
Gisinger, SonjaDLR, IPAhttps://orcid.org/0000-0001-8188-4458
Ehard, BenediktDLR, IPAhttps://orcid.org/0000-0003-0517-8134
Pautet, Pierre-DominiqueUtah State UniversityUNSPECIFIED
Rapp, MarkusDLR,IPAUNSPECIFIED
Date:2018
Journal or Publication Title:Monthly Weather Review
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:146
DOI :10.1175/MWR-D-17-0080.1
Page Range:pp. 1861-1888
Publisher:American Meteorological Society
ISSN:0027-0644
Status:Published
Keywords:transient tropospheric forcing, deep vertical mountain wave propagation, in-situ and remote-sensing observations
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):Vorhaben Mittlere Atmosphäre
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics
Deposited By: Ziegele, Brigitte
Deposited On:13 Mar 2018 18:23
Last Modified:31 Jul 2019 20:16

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