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Long-term changes in tropospheric ozone
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dc.contributor.authorOltmans, Samuel J.es_ES
dc.contributor.authorLefohn, Allen S.es_ES
dc.contributor.authorHarris, J. M.es_ES
dc.contributor.authorGalbally, Ian E.es_ES
dc.contributor.authorScheel, H. E.es_ES
dc.contributor.authorBodeker, G.es_ES
dc.contributor.authorBrunke, E.-G.es_ES
dc.contributor.authorClaude, H.es_ES
dc.contributor.authorTarasick, David W.es_ES
dc.contributor.authorJohnson, B. J.es_ES
dc.contributor.authorSimmonds, Peteres_ES
dc.contributor.authorShadwick, Douglas S.es_ES
dc.contributor.authorAnlauf, K.es_ES
dc.contributor.authorHayden, Katherinees_ES
dc.contributor.authorSchmidlin, Frank J.es_ES
dc.contributor.authorFujimoto, T.es_ES
dc.contributor.authorAkagi, K.es_ES
dc.contributor.authorMeyer, C. P.es_ES
dc.contributor.authorNichol, Sylviaes_ES
dc.contributor.authorDavies, Jonathanes_ES
dc.contributor.authorRedondas, Albertoes_ES
dc.contributor.authorCuevas Agulló, Emilioes_ES
dc.identifier.citationAtmospheric Environment. 2006, 40, p. 3156-3173es_ES
dc.description.abstractTropospheric ozone changes are investigated using a selected network of surface and ozonesonde sites to give a broad geographic picture of long-term variations. The picture of long-term tropospheric ozone changes is a varied one in terms of both the sign and magnitude of trends and in the possible causes for the changes. At mid latitudes of the S.H. three time series of ∼20 years in length agree in showing increases that are strongest in the austral spring (August–October). Profile measurements show this increase extending through the mid troposphere but not into the highest levels of the troposphere. In the N.H. in the Arctic a period of declining ozone in the troposphere through the 1980s into the mid-1990s has reversed and the overall change is small. The decadal-scale variations in the troposphere in this region are related in part to changes in the lowermost stratosphere. At mid latitudes in the N.H., continental Europe and Japan showed significant increases in the 1970s and 1980s. Over North America rises in the 1970s are less than those seen in Europe and Japan, suggesting significant regional differences. In all three of these mid latitude, continental regions tropospheric ozone amounts appear to have leveled off or in some cases declined in the more recent decades. Over the North Atlantic three widely separated sites show significant increases since the late-1990s that may have peaked in recent years. In the N.H. tropics both the surface record and the ozonesondes in Hawaii show a significant increase in the autumn months in the most recent decade compared to earlier periods that drives the overall increase seen in the 30-year record. This appears to be related to a shift in the transport pattern during this season with more frequent flow from higher latitudes in the latest decade.es_ES
dc.subjectSurface ozonees_ES
dc.subjectTropospheric chemistryes_ES
dc.subjectOzone transportes_ES
dc.titleLong-term changes in tropospheric ozonees_ES
Appears in Collections:Artículos científicos 2005-2009

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