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Lagrangian analysis of low level anthropogenic plume processing across the North Atlantic

Real, E. und Law, K. und Schlager, H. und Roiger, A. und Huntrieser, H. und Methven, J. und Cain, M. und Holloway, J. und Neuman, J.A. und Ryerson, T. und Flocke, F. und de Gouw, J. und Atlas, E. und Donnelly, S. und Parrish, D. (2008) Lagrangian analysis of low level anthropogenic plume processing across the North Atlantic. Atmospheric Chemistry and Physics, 8, Seiten 7737-7754.

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Kurzfassung

The photochemical evolution of an anthropogenic plume from the New-York/Boston region during its transport at low altitudes over the North Atlantic to the European west coast has been studied using a Lagrangian framework. This plume, originally strongly polluted, was sampled by research aircraft just off the North American east coast on 3 successive days, and 3 days downwind off the west coast of Ireland where another aircraft re-sampled a weakly polluted plume. Changes in trace gas concentrations during transport were reproduced using a photochemical trajectory model including deposition and mixing effects. Chemical and wet deposition processing dominated the evolution of all pollutants in the plume. The mean net O3 production was evaluated to be -5 ppbv/day leading to low values of O3 by the time the plume reached Europe. Wet deposition of nitric acid was responsible for an 80% reduction in this O3 production. If the plume had not encountered precipitation, it would have reached the Europe with O3 levels up to 80-90 ppbv, and CO levels between 120 and 140 ppbv. Photochemical destruction also played a more important role than mixing in the evolution of plume CO due to high levels of both O3 and water vapour showing that CO cannot always be used as a tracer for polluted air masses, especially for plumes transported at low altitudes. The results also show that, in this case, an important increase in the O3/CO slope can be attributed to chemical destruction of CO and not to photochemical O3 production as is often assumed.

Dokumentart:Zeitschriftenbeitrag
Titel:Lagrangian analysis of low level anthropogenic plume processing across the North Atlantic
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Real, E.Service d'Aéronomie, Paris, F
Law, K.Service d'Aéronomie, Paris, F
Schlager, H.DLR
Roiger, A.DLR
Huntrieser, H.DLR
Methven, J.Univ. of Reading, Reading, UK
Cain, M.Univ. of Reading, Reading, UK
Holloway, J.Univ. of Colorado at Boulder, Boulder, CO, USA
Neuman, J.A.Univ. of Colorado at Boulder, Boulder, CO, USA
Ryerson, T.NOAA ESRL, Boulder, CO, USA
Flocke, F.NCAR, Boulder, CO, USA
de Gouw, J.Univ. of Colorado at Boulder, Boulder, CO, USA
Atlas, E.Univ. of Miami, Miami, USA
Donnelly, S.Fort Hays State Univ., Hays, KS, USA
Parrish, D.NOAA ESRL, Boulder, CO, USA
Datum:2008
Erschienen in:Atmospheric Chemistry and Physics
Referierte Publikation:Ja
In Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:8
Seitenbereich:Seiten 7737-7754
Status:veröffentlicht
Stichwörter:pollution plume, ozone production, photochemical modeling
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 - Luftverkehr und Wetter (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Atmosphärische Spurenstoffe
Hinterlegt von: Dr.rer.nat. Heidi Huntrieser
Hinterlegt am:07 Jan 2009
Letzte Änderung:20 Okt 2014 14:32

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