elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Composition of the TTL over Darwin: local mixing or long-range transport?

Heyes, W.J. and Vaughan, G. and Allen, G. and Volz-Thomas, A. and Pätz, H.-W. and Busen, R. (2009) Composition of the TTL over Darwin: local mixing or long-range transport? Atmospheric Chemistry and Physics, 9, pp. 7725-7736.

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
5MB

Official URL: http://www.atmos-chem-phys.net/9/7725/2009/

Abstract

We present ozone and carbon monoxide measurements taken in Darwin, Australia, during the wet season of 2005/2006, to examine whether the composition of the Tropical Tropopause Layer (TTL) reflects that of the local boundary layer or is influenced more by advection from distant sources. We find that the latter predominates in the upper TTL, and is also the major influence in the lower TTL, except during an active monsoon phase. The day-to-day variability of ozone in the TTL is far greater than that in the lower troposphere, and correlates closely with air mass origin deduced from trajectory calculations based on standard ECMWF wind analyses. Although clear evidence of recent local uplift was found in carbon monoxide tracer measurements recorded inside convective anvils, no such signal was found out-of-cloud in the background TTL, where the measured variability correlated well with air mass origin deduced from back-trajectories. This study suggests that the composition of the TTL is ultimately determined by vertical mixing in certain "hot spot" regions of the tropics, with advection from these regions dominating the composition elsewhere.

Document Type:Article
Title:Composition of the TTL over Darwin: local mixing or long-range transport?
Authors:
AuthorsInstitution or Email of Authors
Heyes, W.J.Univ. of Manchester, Manchester, UK
Vaughan, G.Univ. of Manchester, Manchester, UK
Allen, G.Univ. of Manchester, Manchester, UK
Volz-Thomas, A.FZ Jülich, Jülich
Pätz, H.-W.FZ Jülich, Jülich
Busen, R.DLR
Date:19 October 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. 7725-7736
Status:Published
Keywords:TTL, carbon monoxide, ozone
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 Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Dr.phil.nat. Reinhold Busen
Deposited On:27 Oct 2009 15:26
Last Modified:12 Dec 2013 20:43

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.