Show simple item record

Evaluation of tropospheric and stratospheric ozone trends over Western Europe from ground-based FTIR network observations

dc.contributor.authorVigouroux, C.
dc.contributor.authorDe Mazière, M.
dc.contributor.authorDemoulin, P.
dc.contributor.authorServais, C.
dc.contributor.authorHase, F.
dc.contributor.authorBlumenstock, T.
dc.contributor.authorKramer, I.
dc.contributor.authorSchneider, M.
dc.contributor.authorMellqvist, J.
dc.contributor.authorStrandberg, A.
dc.contributor.authorVelazco, V.
dc.contributor.authorNotholt, J.
dc.contributor.authorSussmann, R.
dc.contributor.authorStremme, W.
dc.contributor.authorRockmann, A.
dc.contributor.authorGardiner, T.
dc.contributor.authorColeman, M.
dc.contributor.authorWoods, P.
dc.date2008
dc.date.accessioned2016-09-21T09:32:10Z
dc.date.available2016-09-21T09:32:10Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/4306
dc.descriptionWithin the European project UFTIR (Time series of Upper Free Troposphere observations from an European ground-based FTIR network), six ground-based stations in Western Europe, from 79deg; N to 28deg; N, all equipped with Fourier Transform infrared (FTIR) instruments and part of the Network for the Detection of Atmospheric Composition Change (NDACC), have joined their efforts to evaluate the trends of several direct and indirect greenhouse gases over the period 1995-2004. The retrievals of CO, CH4, C2H 6, N2O, CHClF2, and O3 have been optimized. Using the optimal estimation method, some vertical information can be obtained in addition to total column amounts. A bootstrap resampling method has been implemented to determine annual partial and total column trends for the target gases. The present work focuses on the ozone results. The retrieved time series of partial and total ozone columns are validated with ground-based correlative data (Brewer, Dobson, UV-Vis, ozonesondes, and Lidar). The observed total column ozone trends are in agreement with previous studies: 1) no total column ozone trend is seen at the lowest latitude station Izaña (28° N); 2) slightly positive total column trends are seen at the two mid-latitude stations Zugspitze and Jungfraujoch (47° N), only one of them being significant; 3) the highest latitude stations Harestua (60° N), Kiruna (68° N) and Ny-Ålesund (79° N) show significant positive total column trends. Following the vertical information contained in the ozone FTIR retrievals, we provide partial columns trends for the layers: ground-10 km, 10-18 km, 18-27 km, and 27-42 km, which helps to distinguish the contributions from dynamical and chemical changes on the total column ozone trends. We obtain no statistically significant trends in the ground-10 km layer for five out of the six ground-based stations. We find significant positive trends for the lowermost stratosphere at the two mid-latitude stations, and at Ny-Ålesund. We find smaller, but significant trends for the 18-27 km layer at Kiruna, Harestua, Jungfraujoch, and Izaña. The results for the upper layer are quite contrasted: we find significant positive trends at Kiruna, Harestua, and Jungfraujoch, and significant negative trends at Zugspitze and Izaña. These ozone partial columns trends are discussed and compared with previous studies.
dc.languageeng
dc.titleEvaluation of tropospheric and stratospheric ozone trends over Western Europe from ground-based FTIR network observations
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeatmospheric chemistry
dc.subject.freebootstrapping
dc.subject.freechemical composition
dc.subject.freecomparative study
dc.subject.freeFTIR spectroscopy
dc.subject.freegreenhouse gas
dc.subject.freeground-based measurement
dc.subject.freeoptimization
dc.subject.freeozone
dc.subject.freestratosphere
dc.subject.freetrend analysis
dc.subject.freetroposphere
dc.subject.freeEurasia
dc.subject.freeEurope
dc.subject.freeWestern Europe
dc.source.titleAtmospheric Chemistry and Physics
dc.source.volume8
dc.source.issue23
dc.source.page6865-6886
Orfeo.peerreviewedYes
dc.identifier.doi10.5194/acp-8-6865-2008
dc.identifier.scopus2-s2.0-57349148223


Files in this item

Thumbnail
Name:
Vigouroux(2008).pdf
Size:
693.0Kb
Format:
PDF
View/Open

This item appears in the following Collection(s)

Show simple item record