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首页> 外文期刊>Atmospheric chemistry and physics >ACE-FTS observation of a young biomass burning plume: first reported measurements of Csub2/subHsub4/sub, Csub3/subHsub6/subO, Hsub2/subCO and PAN by infrared occultation from space
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ACE-FTS observation of a young biomass burning plume: first reported measurements of Csub2/subHsub4/sub, Csub3/subHsub6/subO, Hsub2/subCO and PAN by infrared occultation from space

机译：ACE-FTS观察年轻的生物质燃烧羽流：首次报道了对C 2 H 4 ，C 3 H 6 的测量空间红外掩蔽sub> O，H 2 CO和PAN

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In the course of our study of the upper tropospheric composition with theinfrared Atmospheric Chemistry Experiment – Fourier Transform Spectrometer(ACE–FTS), we found an occultation sequence that on 8 October 2005, sampleda remarkable plume near the east coast of Tanzania. Model simulations of theCO distribution in the Southern hemisphere are performed for this period andthey suggest that the emissions for this event likely originated from anearby forest fire, after which the plume was transported from the sourceregion to the upper troposphere. Taking advantage of the very highsignal-to-noise ratio of the ACE–FTS spectra over a wide wavenumber range(750–4400 cm−1), we present in-depth analyses of the chemicalcomposition of this plume in the middle and upper troposphere, focusing onthe measurements of weakly absorbing pollutants. For this specific biomassburning event, we report simultaneous observations of an unprecedentednumber of organic species. Measurements of C2H4 (ethene),C3H4 (propyne), H2CO (formaldehyde), C3H6O(acetone) and CH3COO2NO2 (peroxyacetylnitrate, abbreviated asPAN) are the first reported detections using infrared occultationspectroscopy from satellites. Based on the lifetime of the emitted species,we discuss the photochemical age of the plume and also report, wheneverpossible, the enhancement ratios relative to CO.
机译：在我们使用红外大气化学实验–傅立叶变换光谱仪（ACE-FTS）研究对流层上层成分的过程中，我们发现了一个掩盖序列，该掩盖序列于2005年10月8日在坦桑尼亚东海岸附近采样到明显的羽状流。在此期间对南半球的CO分布进行了模型模拟，结果表明该事件的排放可能源自附近的森林大火，然后将烟羽从源区转移到对流层上方。利用宽波数范围（750-4400 cm -1 ）中ACE-FTS光谱的极高信噪比，我们对该烟羽的化学成分进行了深入分析在对流层中上层，重点是对弱吸收污染物的测量。对于这一特定的生物质燃烧事件，我们报告了同时观察到前所未有数量的有机物种的情况。 C 2 H 4 （乙烯），C 3 H 4 （丙炔），H 的测量2 CO（甲醛），C 3 H 6 O（丙酮）和CH 3 COO 2 NO 2 （过氧乙酰硝酸盐，缩写为PAN）是首次使用卫星红外遮蔽光谱技术检测到的检测结果。基于排放物种的寿命，我们讨论了羽流的光化学年龄，并在可能的情况下还报告了相对于CO的增强比。

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