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A new interpretation of total column BrO during Arctic spring

dc.contributor.authorSalawitch, R.J.
dc.contributor.authorCanty, T.
dc.contributor.authorKurosu, T.
dc.contributor.authorChance, K.
dc.contributor.authorLiang, Q.
dc.contributor.authorDa Silva, A.
dc.contributor.authorPawson, S.
dc.contributor.authorNielsen, J.E.
dc.contributor.authorRodriguez, J.M.
dc.contributor.authorBhartia, P.K.
dc.contributor.authorLiu, X.
dc.contributor.authorHuey, L.G.
dc.contributor.authorLiao, J.
dc.contributor.authorStickel, R.E.
dc.contributor.authorTanner, D.J.
dc.contributor.authorDibb, J.E.
dc.contributor.authorSimpson, W.R.
dc.contributor.authorDonohoue, D.
dc.contributor.authorWeinheimer, A.
dc.contributor.authorFlocke, F.
dc.contributor.authorKnapp, D.
dc.contributor.authorMontzka, D.
dc.contributor.authorNeuman, J.A.
dc.contributor.authorNowak, J.B.
dc.contributor.authorRyerson, T.B.
dc.contributor.authorOltmans, S.
dc.contributor.authorBlake, D.R.
dc.contributor.authorAtlas, E.L.
dc.contributor.authorKinnison, D.E.
dc.contributor.authorTilmes, S.
dc.contributor.authorPan, L.L.
dc.contributor.authorHendrick, F.
dc.contributor.authorVan Roozendael, M.
dc.contributor.authorKreher, K.
dc.contributor.authorJohnston, P.V.
dc.contributor.authorGao, R.S.
dc.contributor.authorJohnson, B.
dc.contributor.authorBui, T.P.
dc.contributor.authorChen, G.
dc.contributor.authorPierce, R.B.
dc.contributor.authorCrawford, J.H.
dc.contributor.authorJacob, D.J.
dc.date2010
dc.date.accessioned2016-03-30T12:01:18Z
dc.date.available2016-03-30T12:01:18Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3198
dc.descriptionEmission of bromine from sea-salt aerosol, frost flowers, ice leads, and snow results in the nearly complete removal of surface ozone during Arctic spring. Regions of enhanced total column BrO observed by satellites have traditionally been associated with these emissions. However, airborne measurements of BrO and O<inf>3</inf> within the convective boundary layer (CBL) during the ARCTAS and ARCPAC field campaigns at times bear little relation to enhanced column BrO. We show that the locations of numerous satellite BrO "hotspots" during Arctic spring are consistent with observations of total column ozone and tropopause height, suggesting a stratospheric origin to these regions of elevated BrO. Tropospheric enhancements of BrO large enough to affect the column abundance are also observed, with important contributions originating from above the CBL. Closure of the budget for total column BrO, albeit with significant uncertainty, is achieved by summing observed tropospheric partial columns with calculated stratospheric partial columns provided that natural, short-lived biogenic bromocarbons supply between 5 and 10 ppt of bromine to the Arctic lowermost stratosphere. Proper understanding of bromine and its effects on atmospheric composition requires accurate treatment of geographic variations in column BrO originating from both the stratosphere and troposphere. Copyright 2010 by the American Geophysical Union.
dc.languageeng
dc.titleA new interpretation of total column BrO during Arctic spring
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeAtmospheric composition
dc.subject.freeAtmospherics
dc.subject.freeBromine
dc.subject.freeOzone
dc.subject.freeSalt removal
dc.subject.freeTroposphere
dc.subject.freeUpper atmosphere
dc.subject.freeAirborne measurements
dc.subject.freeColumn abundance
dc.subject.freeConvective boundary layers
dc.subject.freeField campaign
dc.subject.freeFrost flowers
dc.subject.freeGeographic variation
dc.subject.freeHotspots
dc.subject.freeLowermost stratosphere
dc.subject.freePartial columns
dc.subject.freeSea salt aerosol
dc.subject.freeSurface ozone
dc.subject.freeTotal column ozone
dc.subject.freeSnow and ice removal
dc.subject.freeaerosol composition
dc.subject.freeatmospheric chemistry
dc.subject.freebromine
dc.subject.freeconvective boundary layer
dc.subject.freeice lead
dc.subject.freeozone
dc.subject.freesatellite imagery
dc.subject.freesea salt
dc.subject.freeseasonality
dc.subject.freesnow
dc.subject.freestratosphere
dc.subject.freetropopause
dc.subject.freeArctic
dc.source.titleGeophysical Research Letters
dc.source.volume37
dc.source.issue21
dc.source.pageL21805
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2010GL043798
dc.identifier.scopus2-s2.0-77956017933


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