Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/49257
Title: Evidence for the influence of the North Atlantic Oscillation on the total ozone column at northern low latitudes and midlatitudes during winter and summer seasons.
Author: Ossó, Albert
Sola Salvatierra, Yolanda
Bech, Joan
Lorente, Jeroni
Keywords: Geofísica
Ozó atmosfèric
Canvis climàtics
Atlàntic, Oceà
Climatologia
Hivern
Estiu
Mediterrània (Regió)
Geophysics
Atmospheric ozone
Climatic changes
Atlantic Ocean
Climatology
Winter
Summer
Mediterranean Region
Issue Date: 2011
Publisher: American Geophysical Union
Abstract: The strong influence of the winter North Atlantic Oscillation (NAO) on the total ozone column (TOC) in the Northern Hemisphere has been reported in a number of previous studies. In this study we show that this influence is not restricted to the winter season but is also significant in summer. Especially interesting effects of the summer NAO (SNAO) on the TOC are observed over the eastern Mediterranean region, where a strongly positive SNAO index is related to the creation of a geopotential height-negative anomaly over Greece with maximum amplitude at 200 hPa. Another anomaly was observed west of the Iberian Peninsula with similar effects on the TOC. Analyzing 26 years of Total Ozone Mapping Spectrometer (TOMS) and Ozone Monitoring Instrument (OMI) data from the equator to midlatitudes (60°) in the Northern Hemisphere, we demonstrate that the SNAO accounts for up to 30% of the TOC variability with a strong latitudinal and longitudinal dependence. Additionally, we obtain significant correlations between the NAO index and the thermal tropopause pressure and also with the geopotential heights at 200 and 500 hPa. Finally, some indirect connections between NAO and the TOC through teleconnections are also discussed.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1029/2011JD016539
It is part of: Journal of Geophysical Research, 2011, vol. 116, num. D24122, p. 1-12
Related resource: http://dx.doi.org/10.1029/2011JD016539
URI: http://hdl.handle.net/2445/49257
ISSN: 0148-0227
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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