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One-decade trend analysis of stratospheric BrO over Harestua (60°N) and Lauder (45°S) reveals a decline

dc.contributor.authorHendrick, F.
dc.contributor.authorJohnston, P.V.
dc.contributor.authorDe Mazière, M.
dc.contributor.authorFayt, C.
dc.contributor.authorHermans, C.
dc.contributor.authorKreher, K.
dc.contributor.authorTheys, N.
dc.contributor.authorThomas, A.
dc.contributor.authorVan Roozendael, M.
dc.date2008
dc.date.accessioned2016-09-21T10:35:07Z
dc.date.available2016-09-21T10:35:07Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/4323
dc.descriptionA trend analysis is performed of stratospheric BrO from ground-based UV-visible observations at Harestua (60°N, 11°E) and Lauder (45°S, 170°E) from 1995 through 2005. At both stations, a positive trend of about +2.5% per year is found for the 1995-2001 period, while a negative trend of about -1% per year is obtained between 2001 and 2005. Given a mean age of air of about 4 ± 1 years, the decline in stratospheric bromine since 2002 follows the decline of tropospheric organic bromine observed since the second half of 1998, as a result of the Montreal Protocol. These findings confirm that the impact of the Montreal Protocol restrictions on brominated substances have now reached the stratosphere. From our study, we have also derived a contribution of 6 ± 4 ppt of the brominated very short-lived substances and inorganic bromine tropospheric sources to the total bromine loading.
dc.languageeng
dc.titleOne-decade trend analysis of stratospheric BrO over Harestua (60°N) and Lauder (45°S) reveals a decline
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeNetwork protocols
dc.subject.freeSulfur compounds
dc.subject.freeTroposphere
dc.subject.freeBrominated substances
dc.subject.freeGround-based
dc.subject.freeInorganic bromine
dc.subject.freeMean age of air
dc.subject.freeMontreal protocol
dc.subject.freeTrend analysis
dc.subject.freeUv-visible
dc.subject.freeVery short-lived substances
dc.subject.freeBromine
dc.subject.freeair quality
dc.subject.freeatmospheric chemistry
dc.subject.freebromine
dc.subject.freedecadal variation
dc.subject.freeground-based measurement
dc.subject.freeMontreal Protocol
dc.subject.freestratosphere
dc.subject.freetrend analysis
dc.subject.freetroposphere
dc.subject.freeAustralasia
dc.subject.freeEurasia
dc.subject.freeEurope
dc.subject.freeHarestua
dc.subject.freeLauder
dc.subject.freeNew Zealand
dc.subject.freeNorthern Europe
dc.subject.freeNorway
dc.subject.freeOppland
dc.subject.freeOtago
dc.subject.freeScandinavia
dc.subject.freeSouth Island
dc.source.titleGeophysical Research Letters
dc.source.volume35
dc.source.issue14
dc.source.pageL14801
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2008GL034154
dc.identifier.scopus2-s2.0-53749083832


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