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The SCOUT-O3 Darwin Aircraft Campaign: rationale and mateorology

Brunner, D. and Siegmund, P. and May, P. T. and Chappel, L. and Schiller, C. and Müller, R. and Peter, T. and Fueglistaler, S. and MacKenzie, A. R. and Fix, A. and Schlager, H. and Allen, G. and Fjaeraa, A. M. and Streibel, M. and Harris, N. R. P. (2009) The SCOUT-O3 Darwin Aircraft Campaign: rationale and mateorology. Atmospheric Chemistry and Physics, 9, pp. 93-117.

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Official URL: http://www.atmos-chem-phys.net/9/93/2009/acp-9-93-2009.pdf

Abstract

An aircraft measurement campaign involving the Russian high-altitude aircraft M55 Geophysica and the German DLR Falcon was conducted in Darwin, Australia in November and December 2005 as part of the European integrated project SCOUT-O3. The overall objectives of the campaign were to study the transport of trace gases through the tropical tropopause layer (TTL), mechanisms of dehydration close to the tropopause, and the role of deep convection in these processes. In this paper a detailed roadmap of the campaign is presented, including rationales for each flight, and an analysis of the local and large-scale meteorological context in which they were embedded. The campaign took place during the pre-monsoon season which is characterized by a pronounced diurnal evolution of deep convection including a mesoscale system over the Tiwi Islands north of Darwin known as �\x83¢Â�Â�HectorâÂ�Â�. This allowed studying in detail the role of deep convection in structuring the tropical tropopause region, in situ sampling convective overshoots above storm anvils, and probing the structure of anvils and cirrus clouds by Lidar and a suite of in situ instruments onboard the two aircraft. The large-scale flow during the first half of the campaign was such that local flights, away from convection, sampled air masses downstream of the âÂ�Â�cold trapâÂ�Â� region over Indonesia. Abundant cirrus clouds enabled the study of active dehydration, in particular during two TTL survey flights. The campaign period also encompassed a Rossby wave breaking event transporting stratospheric air to the tropical middle troposphere and an equatorial Kelvin wave modulating tropopause temperatures and hence the conditions for dehydration.

Document Type:Article
Title:The SCOUT-O3 Darwin Aircraft Campaign: rationale and mateorology
Authors:
AuthorsInstitution or Email of Authors
Brunner, D.ETH Zurich, CH
Siegmund, P.KNMI, NL
May, P. T.Bureau of Meteorology Research Centre, Melbourne, AU
Chappel, L.Bureau of Meteorology Research Centre, Melbourne, AU
Schiller, C.FZ Jülich
Müller, R.FZ Jülich
Peter, T.ETH Zurich, CH
Fueglistaler, S.ETH Zurich, CH
MacKenzie, A. R.Lancaster Univ., UK
Fix, A.UNSPECIFIED
Schlager, H.UNSPECIFIED
Allen, G.Univ. of Manchester, Manchester, UK
Fjaeraa, A. M.NILU, N
Streibel, M.Univ. of Cambrige, Cambrige, UK
Harris, N. R. P.Univ. of Cambrige, Cambrige, UK
Date:2009
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:9
Page Range:pp. 93-117
Status:Published
Keywords:SCOUT-O3, Aircraft, Lidar
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben LIDAR-Forschung und -Entwicklung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Stephanie Zähnle
Deposited On:15 Jan 2009
Last Modified:12 Dec 2013 20:35

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