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Trends of ozone total columns and vertical distribution from FTIR observations at eight NDACC stations around the globe

dc.contributor.authorVigouroux, C.
dc.contributor.authorBlumenstock, T.
dc.contributor.authorCoffey, M.
dc.contributor.authorErrera, Q.
dc.contributor.authorGarcia, O.
dc.contributor.authorJones, N.B.
dc.contributor.authorHannigan, J.W.
dc.contributor.authorHase, F.
dc.contributor.authorLiley, B.
dc.contributor.authorMahieu, E.
dc.contributor.authorMellqvist, J.
dc.contributor.authorNotholt, J.
dc.contributor.authorPalm, M.
dc.contributor.authorPersson, G.
dc.contributor.authorSchneider, M.
dc.contributor.authorServais, C.
dc.contributor.authorSmale, D.
dc.contributor.authorTholix, L.
dc.contributor.authorDe Maziere, M.
dc.date2015
dc.date.accessioned2016-03-24T12:08:12Z
dc.date.available2016-03-24T12:08:12Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/2749
dc.descriptionGround-based Fourier transform infrared (FTIR) measurements of solar absorption spectra can provide ozone total columns with a precision of 2% but also independent partial column amounts in about four vertical layers, one in the troposphere and three in the stratosphere up to about 45km, with a precision of 5–6%. We use eight of the Network for the Detection of Atmospheric Composition Change (NDACC) stations having a long-term time series of FTIR ozone measurements to study the total and vertical ozone trends and variability, namely, Ny-Ålesund (79° N), Thule (77° N), Kiruna (68° N), Harestua (60° N), Jungfraujoch (47° N), Izaña (28° N), Wollongong (34° S) and Lauder (45° S). The length of the FTIR time series varies by station but is typically from about 1995 to present. We applied to the monthly means of the ozone total and four partial columns a stepwise multiple regression model including the following proxies: solar cycle, quasi-biennial oscillation (QBO), El Niño–Southern Oscillation (ENSO), Arctic and Antarctic Oscillation (AO/AAO), tropopause pressure (TP), equivalent latitude (EL), Eliassen–Palm flux (EPF), and volume of polar stratospheric clouds (VPSC). At the Arctic stations, the trends are found mostly negative in the troposphere and lower stratosphere, very mixed in the middle stratosphere, positive in the upper stratosphere due to a large increase in the 1995–2003 period, and non-significant when considering the total columns. The trends for mid-latitude and subtropical stations are all non-significant, except at Lauder in the troposphere and upper stratosphere and at Wollongong for the total columns and the lower and middle stratospheric columns where they are found positive. At Jungfraujoch, the upper stratospheric trend is close to significance (+0.9 ± 1.0% decade−1). Therefore, some signs of the onset of ozone mid-latitude recovery are observed only in the Southern Hemisphere, while a few more years seem to be needed to observe it at the northern mid-latitude station.
dc.languageeng
dc.titleTrends of ozone total columns and vertical distribution from FTIR observations at eight NDACC stations around the globe
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeAntarctic Oscillation
dc.subject.freeArctic Oscillation
dc.subject.freeEl Nino-Southern Oscillation
dc.subject.freeFTIR spectroscopy
dc.subject.freeground-based measurement
dc.subject.freeozone
dc.subject.freeprecision
dc.subject.freequasi-biennial oscillation
dc.subject.freestratosphere
dc.subject.freetropopause
dc.subject.freetroposphere
dc.subject.freevertical distribution
dc.subject.freeArctic
dc.subject.freeAustralia
dc.subject.freeBern [Switzerland]
dc.subject.freeGreenland
dc.subject.freeHarestua
dc.subject.freeJungfraujoch
dc.subject.freeKiruna
dc.subject.freeLauder
dc.subject.freeNew South Wales
dc.subject.freeNew Zealand
dc.subject.freeNorrbotten
dc.subject.freeNorway
dc.subject.freeNy-Alesund
dc.subject.freeOppland
dc.subject.freeOtago
dc.subject.freeSouth Island
dc.subject.freeSpitsbergen
dc.subject.freeSvalbard
dc.subject.freeSvalbard and Jan Mayen
dc.subject.freeSweden
dc.subject.freeSwitzerland
dc.subject.freeThule
dc.subject.freeWollongong
dc.source.titleAtmospheric Chemistry and Physics
dc.source.volume15
dc.source.issue6
dc.source.page2915-2933
Orfeo.peerreviewedYes
dc.identifier.doi10.5194/acp-15-2915-2015
dc.identifier.scopus2-s2.0-84924977644


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