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The impact of natural climate variability on air chemistry and regional air quality

Grewe, Volker (2005) The impact of natural climate variability on air chemistry and regional air quality. In: 2005 Atmospheric Transport and Transformation at the Urban and Local Scales - Report of a workshop hosted by ACCENT T&TP, 3.2005, pp. 34-44. 2005 Atmospheric Transport and Transformation at the Urban and Local Scales - Report of a workshop hosted by ACCENT T&TP, 2005-04-02, Valencia (E).

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Official URL: http://www.accent-network.org/

Abstract

The modelling of the atmospheric composition on global scales has been significantly advanced during the last decade. A variety of processes are inherent in climate-chemistry models (CCMs), either resolved, parameterized or forced by boundary conditions. This ensures a better representation of the observed atmospheric composition and its variations, such as large scale climate phenomena (North-Atlantic Oscillation, El Nino/ La Nina, etc), volcanic eruptions, solar effects, etc. Additionally, feedbacks between processes are included, like the impact of ozone, methane, and other species on radiation and dynamics, dynamics on emissions (e.g. lightning), and many others. Dameris et al. (2005) present a troposphere-stratosphere simulation of the time period 1960 to 2000 using the CCM E39/C. This simulation includes observed sea-surface temperatures to account for effects like El Nino, and realistic planetary wave forcings, three major volcanic eruptions, the 11-year solar cycle, the Quasi-Biannual Oscillation (QBO), and varying emission of NOx and CFCs. The results show a good representation of the stratospheric and tropospheric dynamics, such as temperature trends, but also of the ozone layer, the development of the ozone hole, and tropospheric ozone in terms of composition and trend. The application of a number of diagnostics (e.g. marked ozone tracers) allows the separation of the impact of various processes/emissions on tropospheric ozone. The simulated Northern Hemisphere tropospheric ozone budget is not only dominated by nitrogen oxide emissions and other ozone pre-cursors, but also by changes of the stratospheric ozone budget and the its flux into the troposphere, which tends to reduce the positive trend in ozone due to emissions from industry and traffic during the late 80s and early 90s. Although the horizontal resolution is rather coarse in comparison to regional models, such kind of simulations provide useful and necessary information on the impact of large-scale processes and inter-annual / decadal variations on regional air quality

Document Type:Conference or Workshop Item (Speech)
Title:The impact of natural climate variability on air chemistry and regional air quality
Authors:
AuthorsInstitution or Email of Authors
Grewe, VolkerUNSPECIFIED
Date:August 2005
Journal or Publication Title:2005 Atmospheric Transport and Transformation at the Urban and Local Scales - Report of a workshop hosted by ACCENT T&TP
Refereed publication:No
In ISI Web of Science:No
Volume:3.2005
Page Range:pp. 34-44
Editors:
EditorsEmail
Moussioloulos, NicolasUNSPECIFIED
Kalognomou, Evangelia-AnnaUNSPECIFIED
Series Name:ACCENT reports
Status:Published
Keywords:climate change, global modelling, air quality, ozone trends
Event Title:2005 Atmospheric Transport and Transformation at the Urban and Local Scales - Report of a workshop hosted by ACCENT T&TP
Event Location:Valencia (E)
Event Type:international Conference
Event Dates:2005-04-02
Organizer:ACCENT
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 Dynamics
Deposited By: Dr.rer.nat. Volker Grewe
Deposited On:30 Jan 2006
Last Modified:12 Dec 2013 20:09

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