A pervasive role for biomass burning in tropical high ozone/low water structures.
A pervasive role for biomass burning in tropical high ozone/low water structures.
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DOI：
10.1038/ncomms10267
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发表时间：
2016-01-13
影响因子：
16.6
通讯作者：
Weinheimer AJ
中科院分区：
文献类型：
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作者：
Anderson DC;Nicely JM;Salawitch RJ;Canty TP;Dickerson RR;Hanisco TF;Wolfe GM;Apel EC;Atlas E;Bannan T;Bauguitte S;Blake NJ;Bresch JF;Campos TL;Carpenter LJ;Cohen MD;Evans M;Fernandez RP;Kahn BH;Kinnison DE;Hall SR;Harris NR;Hornbrook RS;Lamarque JF;Le Breton M;Lee JD;Percival C;Pfister L;Pierce RB;Riemer DD;Saiz-Lopez A;Stunder BJ;Thompson AM;Ullmann K;Vaughan A;Weinheimer AJ
高 O3 和低 H2O 混合比 (HOLW) 的气团是热带西太平洋 (TWP) 对流层中层 (300–700 hPa) 的常见特征。在这里，利用 2014 年冬季 TWP 飞机采样期间收集的数据，我们发现 O3 与这些 HOLW 结构中的多种生物质燃烧示踪剂存在很强的正相关性。这些结构中的臭氧水平大约是背景水平的三倍。模型、卫星数据和飞机观测结果表明，热带非洲和东南亚的火灾是高 O3 的主要来源，而低 H2O 则是热带对流层内大规模下降的结果。先前将 HOLW 结构归因于平流层或中纬度对流层传输的解释与我们的观察不一致。这项研究表明，生物质燃烧对偏远 TWP 气候辐射强迫的作用比人们普遍认识的要大。 热带西太平洋的高臭氧和低水结构通常归因于来自平流层或中纬度地区的输送。在这里，安德森等人。表明这些结构实际上是由生物质燃烧羽流中产生的臭氧和热带地区空气的大规模下降造成的。
Air parcels with mixing ratios of high O3 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 O3 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 O3 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. High ozone and low water structures in the tropical western Pacific are commonly attributed to transport from the stratosphere or mid-latitudes. Here, Anderson et al. show these structures actually result from ozone production in biomass burning plumes and large-scale descent of air within the tropics.