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Characteristics of gravity waves observed by Rayleigh lidar in the middle atmosphere above New Zealand

Kaifler, Bernd and Kaifler, Natalie and Ehard, Benedikt and Dörnbrack, Andreas and Rapp, Markus (2015) Characteristics of gravity waves observed by Rayleigh lidar in the middle atmosphere above New Zealand. 2015 AGU Fall Meeting, 14.-18. Dez. 2015, San Francisco, USA.

Full text not available from this repository.

Official URL: https://agu.confex.com/agu/fm15/meetingapp.cgi/Paper/78890

Abstract

The Temperature Lidar for Middle Atmosphere research (TELMA) made atmospheric soundings at Lauder, New Zealand, over a period of 5 months in southern winter 2014. Strong gravity wave (GW) activity occurred in sporadic intervals lasting a few days. Large-amplitude mountain waves were detected during periods with high tropospheric wind speeds perpendicular to the Southern Alps. During the strongest event (29 July to 1 August) mountain wave amplitudes in excess of 15 K occurred at 40 km altitude, resulting in GW potential energy density enhancements exceeding one order of magnitude. The quasi-stationary large-amplitude waves often break and dissipate in the stratosphere and do not reach mesospheric altitudes. Secondary GWs radiated in this process account for a significant shift in the wave spectrum toward smaller scales. In addition, a substantial number of small-scale secondary GWs are generated as a result of propagating primary GWs interacting with tides. In the mesosphere, largest mountain wave amplitudes occur during conditions of weak to moderate tropospheric forcing (wind speeds in the range 2-12 m/s) and sufficiently strong stratospheric wind speeds (> 10 m/s) to allow vertical propagation.

Item URL in elib:https://elib.dlr.de/102230/
Document Type:Conference or Workshop Item (Speech)
Title:Characteristics of gravity waves observed by Rayleigh lidar in the middle atmosphere above New Zealand
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kaifler, BerndDLR, IPAUNSPECIFIED
Kaifler, NatalieDLR, IPAUNSPECIFIED
Ehard, BenediktDLR, IPAUNSPECIFIED
Dörnbrack, AndreasDLR, IPAUNSPECIFIED
Rapp, MarkusDLR, IPAUNSPECIFIED
Date:14 December 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:DEEPWAVE, Lidar, Middle Atmosphere, Gravity Waves
Event Title:2015 AGU Fall Meeting
Event Location:San Francisco, USA
Event Type:international Conference
Event Dates:14.-18. Dez. 2015
Organizer:American Geophysical Union
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
Deposited By: Kaifler, Bernd
Deposited On:15 Jan 2016 17:14
Last Modified:10 May 2016 23:42

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