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

作者：Anderson Daniel C^*; Nicely Julie M; Salawitch Ross J; Canty Timothy P; Dickerson Russell R; Hanisco Thomas F; Wolfe Glenn M; Apel Eric C; Atlas Elliot; Bannan Thomas; Bauguitte Stephane; Blake Nicola J; Bresch James F; Campos Teresa L; Carpenter Lucy J; Cohen Mark D; Evans Mathew; Fernandez Rafael P; Kahn Brian H; Kinnison Douglas E; Hall Samuel R; Harris Neil R P; Hornbrook Rebecca S; Lamarque Jean Francois; Le Breton Michael; Lee James D

来源：Nature Communications, 2016, 7(1): 10267.

DOI：10.1038/ncomms10267

Air parcels with mixing ratios of high O-3 and low H2O (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-3 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-3 and that low H2O 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.

• 出版日期2016-1