Wuppertal 2015 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 1: Erdnaher Weltraum

EP 1.1: Hauptvortrag

Montag, 9. März 2015, 14:00–14:30, G.10.02 (HS 9)

Dynamical coupling of the atmosphere by gravity waves: initial results from ground based and airborne field studies — •Markus Rapp and Andreas Dörnbrack — Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany

Gravity waves (GW) play an important role in the coupling between the troposphere and the middle atmosphere by means of momentum and energy transport. Surprisingly little is still known about the details of the GW life cycle, i.e., the processes of GW excitation, propagation and dissipation. In order to study these processes, the DLR-Institute of Atmospheric Physics (IPA) initiated the project GW-LCYCLE in which airborne observations with the DLR-Falcon are combined with meteorological balloon soundings, ground based observations by radar and lidar, and modelling. The first field campaign was conducted in the Northern Arctic in December 2013. In addition, the IPA also participated in the NSF-led DEEPWAVE campaign in June 2014 in which various US groups studied the excitation and propagation of gravity waves in the New Zealand area using research aircraft along with various ground based remote sensing instruments. In DEEPWAVE, the IPA participated again with the DLR Falcon as well as with a new portable Rayleigh lidar for probing the thermal structure of the middle atmosphere from 20 - 80 km altitude. This paper presents the initial results from airborne and ground based observations as well as corresponding model results with focus on a comparison of typical wave properties between the two observation sites in opposite hemispheres.