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Ozone tropospheric and stratospheric trends (1995-2012) at six ground-based FTIR stations (28°N to 79°N)
Vigouroux, Corinne; De Mazière, Martine; Demoulin, Philippe et al.
2013EGU 2013 General Assembly
 

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Keywords :
ozone; atmospheric composition; trace gases; trend; infrared solar spectroscopy; NDACC
Abstract :
[en] In the frame of the Network for the Detection of Atmospheric Composition Change (NDACC), contributing ground-based stations have joined their efforts to homogenize and optimize the retrievals of ozone profiles from FTIR (Fourier transform infrared) solar absorption spectra. Using the optimal estimation method, distinct vertical information can be obtained in four layers: ground-10 km, 10-18 km, 18-27 km, and 27-42 km, in addition to total column amounts. In a previous study, Vigouroux et al. (2008) applied a bootstrap resampling method to determine the trends of the ozone total and four partial columns, over the period 1995-2004 at Western European stations. The updated trends for the period 1995-2009 have been published in the WMO 2010 report. Here, we present the updated trends and their uncertainties, for the 1995-2012 period, for the different altitude ranges, above five European stations (28°N-79°N) and above the station Thule, Greenland (77°N). In this work, the trends have been estimated using a multiple regression model including some explanatory variables responsible for the ozone variability, such as the Quasi Biennial Oscillation (QBO), the solar flux, the Arctic Oscillation (AO) or El Niño-Southern Oscillation (ENSO). A major result is the significant positive trend of ozone in the upper stratosphere, observed at the Jungfraujoch (47°N), which is a typical mid-latitude site, as well as at the high latitude stations. This positive trend in the upper stratosphere at Jungfraujoch provides a sign of ozone recovery at mid-latitudes.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Vigouroux, Corinne;  Belgian Institute for Space Aeronomy, Brussels
De Mazière, Martine;  Belgian Institute for Space Aeronomy, Brussels
Demoulin, Philippe ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Servais, Christian ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Blumenstock, Thomas;  Karlsruhe Institute of Technology (KIT), Germany > Institute for Meteorology and Climate Research (IMK-ASF)
Hase, Frank;  Karlsruhe Institute of Technology (KIT), Germany > Institute for Meteorology and Climate Research (IMK-ASF)
Kohlhepp, Regina;  Karlsruhe Institute of Technology (KIT), Germany > Institute for Meteorology and Climate Research (IMK-ASF)
Barthlott, S.;  Karlsruhe Institute of Technology (KIT), Germany > Institute for Meteorology and Climate Research (IMK-ASF)
García, Omaira;  Agencia Estatal de Meteorología (AEMET), Spain > Izana Atmospheric Research Centre (IARC)
Schneider, Matthias;  Agencia Estatal de Meteorología (AEMET), Spain > Izana Atmospheric Research Centre (IARC)
Mellqvist, Johan;  Chalmers University of Technology, Göteborg, Sweden
Personn, G.;  Chalmers University of Technology, Göteborg, Sweden
Palm, Mathias;  University of Bremen, Bremen, Germany > Institute of Environmental Physics
Notholt, Justus;  University of Bremen, Bremen, Germany > Institute of Environmental Physics
Hannigan, Jim;  National Center for Atmospheric Research (NCAR), Boulder, USA
Coffey, M.;  National Center for Atmospheric Research (NCAR), Boulder, USA
More authors (6 more) Less
Language :
English
Title :
Ozone tropospheric and stratospheric trends (1995-2012) at six ground-based FTIR stations (28°N to 79°N)
Publication date :
April 2013
Event name :
EGU 2013 General Assembly
Event place :
Vienna, Austria
Event date :
07-12 April 2013
Audience :
International
Available on ORBi :
since 10 February 2014

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