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A pervasive role for biomass burning in tropical high ozone/low water structures

AutorAnderson, D.C.; Nicely, J.M.; Salawitch, R.J.; Canty, T.P.; Dickerson, R.R.; Hanisco, T.F.; Wolfe, G.M.; Apel, E.C.; Atlas, E.; Bannan, T.; Bauguitte, S.; Blake, N.J.; Bresch, J.F.; Campos, T.L.; Carpenter, L.J.; Cohen, M.D.; Evans, M.; Fernandez, R.P.; Kahn, B.H.; Kinnison, D.E.; Hall, S.R.; Harris, N.R.P.; Hornbrook, R.S.; Lamarque, J.F.; Le Breton, M.; Lee, J.D.; Percival, C.; Pfister, L.; Pierce, R.B.; Riemer, D.D.; Saiz-Lopez, A. ; Stunder, B.J.B.; Thompson, A.M.; Ullmann, K.; Vaughan, A.; Weinheimer, A.J.
Fecha de publicación2016
EditorNature Publishing Group
CitaciónNature Communications 7 (2016)
ResumenAir parcels with mixing ratios of high O and low HO (HOLW) are common features in the tropical western Pacific (TWP) mid-troposphere (300-700 hPa). Here, using data collected during aircraft sampling of the TWP in winter 2014, we find strong, positive correlations of O with multiple biomass burning tracers in these HOLW structures. Ozone levels in these structures are about a factor of three larger than background. Models, satellite data and aircraft observations are used to show fires in tropical Africa and Southeast Asia are the dominant source of high O and that low HO results from large-scale descent within the tropical troposphere. Previous explanations that attribute HOLW structures to transport from the stratosphere or mid-latitude troposphere are inconsistent with our observations. This study suggest a larger role for biomass burning in the radiative forcing of climate in the remote TWP than is commonly appreciated.
Identificadoresdoi: 10.1038/ncomms10267
issn: 2041-1723
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