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A Stochastic Representation of Temperature Fluctuations Induced by Mesoscale Gravity Waves

Kärcher, Bernd and Podglajen, Aurélien (2019) A Stochastic Representation of Temperature Fluctuations Induced by Mesoscale Gravity Waves. Journal of Geophysical Research: Atmospheres, 124 (21), pp. 11506-11529. Wiley. DOI: 10.1029/2019JD030680 ISSN 0148-0227

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Official URL: https://elib.dlr.de/130763/1/JGR124_2019JD030680_2019.pdf

Abstract

Ubiquitous mesoscale gravity waves generate high cooling rates important for cirrus formation. We make use of long‐duration balloon observations to devise a probabilistic model describing mesoscale temperature uctuations (MTF) away from strong wave sources. We define background conditions based on observed probability distributions of temperature and underlying vertical wind speed fluctuations. We show theoretically that MTF are subject to damping at a rate near the Coriolis frequency when the vertical wind speed fluctuations are autocorrelated over a fraction of a Brunt‐Väisälä period.

Item URL in elib:https://elib.dlr.de/130763/
Document Type:Article
Title:A Stochastic Representation of Temperature Fluctuations Induced by Mesoscale Gravity Waves
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kärcher, BerndDLR, IPAhttps://orcid.org/0000-0003-0278-4980
Podglajen, AurélienForschungszentrum Jülich, GermanyUNSPECIFIED
Date:13 November 2019
Journal or Publication Title:Journal of Geophysical Research: Atmospheres
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:124
DOI :10.1029/2019JD030680
Page Range:pp. 11506-11529
Publisher:Wiley
ISSN:0148-0227
Status:Published
Keywords:cirrus clouds, gravity waves, ice nucleation parameterization, updraft speed variability, mesoscale
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):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Kärcher, Prof. Bernd
Deposited On:20 Nov 2019 07:17
Last Modified:27 May 2020 12:36

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