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Gravity wave observations in the middle atmosphere at a mid-latitude southern-hemisphere site

Kaifler, Natalie and Kaifler, Bernd and Dörnbrack, Andreas and Ehard, Benedikt and Rapp, Markus (2015) Gravity wave observations in the middle atmosphere at a mid-latitude southern-hemisphere site. 12th International Workshop on Layered Phenomena in the Mesopause Region, 10.-13. August 2015, Boulder, USA.

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Abstract

The international DEEPWAVE campaign was carried out in New Zealand in 2014 to study gravity wave dynamics and vertical coupling in the lower and middle atmosphere. We present 500 hours of Rayleigh lidar measurements obtained at Lauder between June and November 2014 in the altitude range 25 to 85 km. The high temporal resolution (10 min) allows for detection of short-period gravity waves in the upper mesosphere. Gravity wave potential energy density derived from measured temperature profiles is used as proxy for gravity wave activity. It is strongly modulated by single events of one to five days duration. Gravity wave parameters like vertical wavelength and observed period are estimated using spectral analysis of wave-induced temperature perturbations and the amount of upward- and downward propagating waves is quantified. Mountain waves, detected in the lower stratosphere during strong tropospheric forcing, are generally not found to propagate to mesospheric altitudes. Short-period waves are observed in the whole altitude range, leading to large temperature perturbations in the upper mesosphere.

Item URL in elib:https://elib.dlr.de/96797/
Document Type:Conference or Workshop Item (Speech)
Title:Gravity wave observations in the middle atmosphere at a mid-latitude southern-hemisphere site
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kaifler, NatalieDLR, IPAUNSPECIFIED
Kaifler, BerndDLR, IPAUNSPECIFIED
Dörnbrack, AndreasDLR, IPAUNSPECIFIED
Ehard, BenediktDLR, IPAUNSPECIFIED
Rapp, MarkusDLR, IPAUNSPECIFIED
Date:13 August 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:Schwerewellen, LIDAR, Mesosphäre, DEEPWAVE
Event Title:12th International Workshop on Layered Phenomena in the Mesopause Region
Event Location:Boulder, USA
Event Type:international Conference, Workshop
Event Dates:10.-13. August 2015
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 > Lidar
Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics
Deposited By: Kaifler, Bernd
Deposited On:23 Jun 2015 11:40
Last Modified:23 Jun 2015 11:40

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