Reference : Impact of circulation changes on the long-term trend of stratospheric hydrogen fluori...
Scientific congresses and symposiums : Poster
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/211288
Impact of circulation changes on the long-term trend of stratospheric hydrogen fluoride at five NDACC stations
English
Prignon, Maxime mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Bernath, P.F. [Old Dominion University, Norfolk VA > > > >]
Blumenstock, T. [Karlsruhe Institut of Technology, IMK-ASF > > > >]
Chipperfield, M.P. [University of Leeds, UK > > > >]
Hase, F. [Karlsruhe Institut of Technology, IMK-ASF > > > >]
Schneider, M. [Karlsruhe Institut of Technology, IMK-ASF > > > >]
Smale, D. [NIWA, Lauder, NZ > > > >]
Walker, W.A. [University of Toronto - U of T > > > >]
Chabrillat, S. [BIRA-IASB > > > >]
Servais, Christian mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Mahieu, Emmanuel mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
29-May-2017
No
International
IRWG-TCCON meeting 2017
du 29 mai 2017 au 2 juin 2017
Paris
France
[en] stratosphere ; circulation changes ; Climate chemistry
[en] Hydrogen fluoride is mainly produced by the photolysis of anthropogenic source gases such as the chlorofluorocarbons (CFC), the hydrochlorofluorocarbons (HCFC) and the hydrofluorocarbons (HFC). These families of species are known for contributing to ozone depletion and/or to the greenhouse effect. It is thus essential to regulate and monitor their emissions. Despite the fact that the Montreal protocol (1987) has succeeded to reduce and then suppress the CFC emissions, HF is still increasing in the stratosphere because of ongoing emissions of the HCFC and HFC substitution products.
In the framework of the recent studies demonstrating the influence of stratospheric circulation changes on the trend of long-lived tracers (e.g. hydrogen chlorine), we decided to investigate the impact of these circulation changes on HF. To achieve this objective, the rates of changes over time of HF total/partial columns at various latitudes of the globe will be determined and critically discussed. Fourier Transform Infrared data produced at five NDACC sites (Kiruna – 68°N, Jungfraujoch – 46°N, Izana – 28°N, Lauder 45°S and Arrival-heights – 78°S) and satellite data (HALOE and ACE) will be used for this study. This preliminary selection of ground-based stations allows to cover both hemispheres and our period of investigation (last two decades). Finally, in order to support our data interpretation, two SLIMCAT simulations (standard and fixed dynamics) will also be included.
F.R.S.-FNRS - Fonds de la Recherche Scientifique
ACCROSS
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/211288

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