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North Atlantic Oscillation and Tropospheric Ozone Variability in Europe: Model Analysis and Measurements Intercomparison : Volume 12, Issue 1 (30/01/2012)

By Pausata, F. S. R.

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Book Id: WPLBN0003975428
Format Type: PDF Article :
File Size: Pages 37
Reproduction Date: 2015

Title: North Atlantic Oscillation and Tropospheric Ozone Variability in Europe: Model Analysis and Measurements Intercomparison : Volume 12, Issue 1 (30/01/2012)  
Author: Pausata, F. S. R.
Volume: Vol. 12, Issue 1
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Vignati, E., Dentener, F. J., Pozzoli, L., & R. Pausat, F. S. (2012). North Atlantic Oscillation and Tropospheric Ozone Variability in Europe: Model Analysis and Measurements Intercomparison : Volume 12, Issue 1 (30/01/2012). Retrieved from http://worldlibrary.net/


Description
Description: European Commission, Joint Research Center, Institute for Environment and Sustainability, Ispra (VA), Italy. Ozone pollution represents a serious health and environmental problem. While ozone pollution is mostly produced by photochemistry in summer, elevated ozone concentrations can also be influenced by long range transport driven by the atmospheric circulation and stratospheric ozone intrusions. We analyze the role of large scale atmospheric circulation variability in the North Atlantic basin in determining surface ozone concentrations. Here, we show, using ground station measurements and a coupled atmosphere-chemistry model simulation for the period 1980–2005, that the North Atlantic Oscillation (NAO) does affect surface ozone concentrations – on average, over 10 ppbv on the monthly mean in southwestern, central and northern Europe – during all seasons except fall. The commonly used NAO index is able to capture the link existing between atmospheric dynamics and surface ozone concentrations in winter and spring but it fails in summer. We find that the first Principal Component, computed from the time variation of the sea level pressure (SLP) field, detects the atmosphere circulation/ozone relationship not only in winter and spring but also during summer, when the atmospheric circulation weakens and regional photochemical processes peak. The first Principal Component of the SLP field could be used as a tool to identify areas more exposed to forthcoming ozone pollution events. Finally, our results suggest that the increasing baseline ozone in western and northern Europe during the 1990s could be related to the prevailing phase of the NAO in that period.

Summary
North Atlantic Oscillation and tropospheric ozone variability in Europe: model analysis and measurements intercomparison

Excerpt
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