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The Influence of Polar Vortex Ozone Depletion on NH Mid-latitude Ozone Trends in Spring : Volume 6, Issue 2 (10/03/2006)

By Andersen, S. B.

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Book Id: WPLBN0003982902
Format Type: PDF Article :
File Size: Pages 19
Reproduction Date: 2015

Title: The Influence of Polar Vortex Ozone Depletion on NH Mid-latitude Ozone Trends in Spring : Volume 6, Issue 2 (10/03/2006)  
Author: Andersen, S. B.
Volume: Vol. 6, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2006
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Knudsen, B. M., & Andersen, S. B. (2006). The Influence of Polar Vortex Ozone Depletion on NH Mid-latitude Ozone Trends in Spring : Volume 6, Issue 2 (10/03/2006). Retrieved from http://community.ebooklibrary.org/


Description
Description: Danish Meteorological Institute, Research and Development Department, Lyngbyvej 100, 2100 Copenhagen Ø, Denmark. Reverse domain-filling trajectory calculations have been performed for the years 1993, 1995, 1996, 1997, and 2000 to calculate the spreading of ozone depleted air from the polar vortex to midlatitudes in spring. We find that for these years with massive Arctic ozone depletion the zonal mean total ozone column at midlatitudes is reduced with between 7 and 12 DU in the April-May period. The polar vortex and remnants have preferred locations which leads to longitudinal differences in the midlatitude ozone trends. Together with decadal variations in circulation the dilution of ozone depleted air may explain the major fraction of longitudinal differences in midlatitude ozone trends. The dilution also has a significant impact on the zonal mean ozone trends. With a multiple linear regression model we find that the dilution may explain 39% of the trend in the period 1979–1997 and 54% of the trend in the period 1979–2002. By calculting the effect of simply removing the dilutions we get the possibly more reliable estimates that that dilution may explain 29% of the trend in the period 1979–1997 and 33% of the trend in the period 1979–2002.

Summary
The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring

 

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