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Analysis of convective transport and parameter sensitivity in a single column version of the Goddard Earth Observation System, Version 5, General Circulation Model

Ott, L. und Bacmeister, J. und Pawson, S. und Pickering, K. und Stenchikov, G. und Suarez, M. und Huntrieser, H. und Loewenstein, M. und Lopez, J. und Xueref-Remy, I. (2009) Analysis of convective transport and parameter sensitivity in a single column version of the Goddard Earth Observation System, Version 5, General Circulation Model. Journal of the Atmospheric Sciences, 66, Seiten 627-646. DOI: 10.1175/2008JAS2694.1.

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Kurzfassung

Convection strongly influences the distribution of atmospheric trace gases. General circulation models (GCMs) use convective mass fluxes calculated by parameterizations to transport gases, but the results are difficult to compare with trace gas observations because of differences in scale. The high resolution of cloudresolving models (CRMs) facilitates direct comparison with aircraft observations. Averaged over a sufficient area, CRM results yield a validated product directly comparable to output from a single global model grid column. This study presents comparisons of vertical profiles of convective mass flux and trace gas mixing ratios derived from CRM and single column model (SCM) simulations of storms observed during three field campaigns. In all three cases, SCM simulations underpredicted convective mass flux relative to CRM imulations. As a result, the SCM simulations produced lower trace gas mixing ratios in the upper troposphere in two of the three storms than did the CRM simulations. The impact of parameter sensitivity in the moist physics schemes employed in the SCM has also been examined. Statistical techniques identified the most significant parameters influencing convective transport. Convective mass fluxes are shown to be strongly dependent on chosen parameter values. Results show that altered parameter settings can substantially improve the comparison between SCM and CRM convective mass flux. Upper tropospheric trace gas mixing ratios were also improved in two storms. In the remaining storm, the SCM representation of CO2 was not improved because of differences in entrainment and detrainment levels in the CRM and SCM simulations.

Dokumentart:Zeitschriftenbeitrag
Titel:Analysis of convective transport and parameter sensitivity in a single column version of the Goddard Earth Observation System, Version 5, General Circulation Model
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Ott, L.NASA, Greenbelt, MD, USA
Bacmeister, J.Univ. of Maryland, USA
Pawson, S.NASA, Greenbelt, MD, USA
Pickering, K.NASA, Greenbelt, MD, USA
Stenchikov, G.The State Univ. of New Jersey, USA
Suarez, M.NASA, Greenbelt, MD, USA
Huntrieser, H.NICHT SPEZIFIZIERT
Loewenstein, M.NASA, CA, USA
Lopez, J.Bay Area Environmental Research Inst., CA, USA
Xueref-Remy, I.CNRS, Gif-sur-Yvette, F
Datum:2009
Erschienen in:Journal of the Atmospheric Sciences
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:66
DOI :10.1175/2008JAS2694.1
Seitenbereich:Seiten 627-646
Status:veröffentlicht
Stichwörter:cloud-resolving model, thunderstorms, global circulation models
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:L VU - Luftverkehr und Umwelt (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L VU - Luftverkehr und Umwelt
DLR - Teilgebiet (Projekt, Vorhaben):L - Schadstoffarmer Luftverkehr (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Atmosphärische Spurenstoffe
Hinterlegt von: Dr.rer.nat. Heidi Huntrieser
Hinterlegt am:21 Apr 2009
Letzte Änderung:12 Dez 2013 20:37

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