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Multi-decadal surface ozone trends at globally distributed remote locations
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dc.contributor.authorCooper, Owen R.es_ES
dc.contributor.authorSchultz, Martin G.es_ES
dc.contributor.authorSchröder, Marces_ES
dc.contributor.authorChang, Kai-Lanes_ES
dc.contributor.authorGaudel, Audreyes_ES
dc.contributor.authorCarbajal Benítez, Gerardoes_ES
dc.contributor.authorCuevas Agulló, Emilioes_ES
dc.contributor.authorFröhlich, Marinaes_ES
dc.contributor.authorGalbally, Ian E.es_ES
dc.contributor.authorMolloy, Suziees_ES
dc.contributor.authorKubistin, Dagmares_ES
dc.contributor.authorLu, Xiaoes_ES
dc.contributor.authorMcClure-Begley, Audraes_ES
dc.contributor.authorNédélec, Philippees_ES
dc.contributor.authorO’Brien, Jasones_ES
dc.contributor.authorOltmans, Samuel J.es_ES
dc.contributor.authorPetropavlovskikh, Irinaes_ES
dc.contributor.authorRies, Ludwiges_ES
dc.contributor.authorSenik, Irinaes_ES
dc.contributor.authorSjöberg, Karines_ES
dc.contributor.authorSolberg, Sverrees_ES
dc.contributor.authorSpain, Gerardes_ES
dc.contributor.authorSpangl, Wolfganges_ES
dc.contributor.authorSteinbacher, Martines_ES
dc.contributor.authorTarasick, David W.es_ES
dc.contributor.authorThouret, Valeriees_ES
dc.contributor.authorXu, Xiaobines_ES
dc.date.accessioned2020-06-09T12:54:53Z-
dc.date.available2020-06-09T12:54:53Z-
dc.date.issued2020-
dc.identifier.citationElementa: Science of the Anthropocene. 2020, 8:23, p. 1-34es_ES
dc.identifier.issn2325-1026-
dc.identifier.urihttp://hdl.handle.net/20.500.11765/12042-
dc.description.abstractExtracting globally representative trend information from lower tropospheric ozone observations is extremely difficult due to the highly variable distribution and interannual variability of ozone, and the ongoing shift of ozone precursor emissions from high latitudes to low latitudes. Here we report surface ozone trends at 27 globally distributed remote locations (20 in the Northern Hemisphere, 7 in the Southern Hemisphere), focusing on continuous time series that extend from the present back to at least 1995. While these sites are only representative of less than 25% of the global surface area, this analysis provides a range of regional long-term ozone trends for the evaluation of global chemistry-climate models. Trends are based on monthly mean ozone anomalies, and all sites have at least 20 years of data, which improves the likelihood that a robust trend value is due to changes in ozone precursor emissions and/or forced climate change rather than naturally occurring climate variability. Since 1995, the Northern Hemisphere sites are nearly evenly split between positive and negative ozone trends, while 5 of 7 Southern Hemisphere sites have positive trends. Positive trends are in the range of 0.5–2 ppbv decade–1, with ozone increasing at Mauna Loa by roughly 50% since the late 1950s. Two high elevation Alpine sites, discussed by previous assessments, exhibit decreasing ozone trends in contrast to the positive trend observed by IAGOS commercial aircraft in the European lower free-troposphere. The Alpine sites frequently sample polluted European boundary layer air, especially in summer, and can only be representative of lower free tropospheric ozone if the data are carefully filtered to avoid boundary layer air. The highly variable ozone trends at these 27 surface sites are not necessarily indicative of free tropospheric trends, which have been overwhelmingly positive since the mid-1990s, as shown by recent studies of ozonesonde and aircraft observations.es_ES
dc.description.sponsorshipThe IAGOS program acknowledges the European Commission for its support of the MOZAIC project (1994–2003) the preparatory phase of IAGOS (2005–2013) and IGAS (2013–2016).es_ES
dc.language.isoenges_ES
dc.publisherUniversity of California Presses_ES
dc.rightsLicencia CC: Reconocimiento CC BYes_ES
dc.subjectTropospheric Ozonees_ES
dc.subjectTrendses_ES
dc.subjectGlobal changees_ES
dc.subjectTrace gases_ES
dc.titleMulti-decadal surface ozone trends at globally distributed remote locationses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.relation.publisherversionhttps://dx.doi.org/10.1525/elementa.420es_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
Colecciones: Artículos científicos 2019-2022


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