Ethane, ethyne and carbon monoxide concentrations in the upper troposphere and lower stratosphere from ACE and GEOS-Chem: a comparison study
Ethane, ethyne and carbon monoxide concentrations in the upper troposphere and lower stratosphere from ACE and GEOS-Chem: a comparison study
复制标题
DOI：
10.5194/acp-11-9927-2011
复制
发表时间：
2011-09
影响因子：
6.3
通讯作者：
G. G. Abad-G.;N. Allen;P. Bernath;C. Boone;S. McLeod;G. Manney;G. Toon;C. Carouge;Yuxuan Wang;Shiliang Wu;M. Barkley;P. Palmer;Yaping Xiao;T. Fu
中科院分区：
文献类型：
--
作者：
G. G. Abad-G.;N. Allen;P. Bernath;C. Boone;S. McLeod;G. Manney;G. Toon;C. Carouge;Yuxuan Wang;Shiliang Wu;M. Barkley;P. Palmer;Yaping Xiao;T. Fu
抽象。近全球对流层上层一氧化碳（CO）浓度，乙烷（C2 H6）和乙炔（C 2 H 2）来自ACE本文介绍了加拿大SCISAT-1卫星上的大气化学实验傅里叶变换光谱仪，并与化学输运模式（CTM）GEOS-1的输出进行了比较。本文通过使用新的微窗口，与以前版本的ACE数据相比，改进了ACE中乙烷和乙炔的反演。改进的乙炔反演，我们已经能够产生一个近全球的对流层上部的空间分布的C2 H2。一氧化碳，乙烷和乙炔浓度检索使用ACE光谱显示预期的季节性与人为排放量和破坏率的变化，以及季节性生物质燃烧活动。GEOS-Chem模型使用二羰基化学套件运行，这是一种扩展的化学机制，其中明确处理乙炔。从卫星观测到的季节性周期很好地再现了模式的输出，但模拟的CO浓度被发现是系统性的偏见低在北方半球。CO和C2 H6模式相对于卫星观测的平均负全球平均偏差分别为12%和7%，C2 H2模式相对于卫星观测的平均正全球平均偏差为1%。ACE数据进行了比较，MkIV光谱仪数据和全球对流层实验（GTE）TRACE-A活动的数据显示出良好的一致性与所有这些验证的目的。
Abstract. Near global upper tropospheric concentrations of carbon monoxide (CO), ethane (C 2 H 6 ) and ethyne (C 2 H 2 ) from ACE (Atmospheric Chemistry Experiment) Fourier transform spectrometer on board the Canadian satellite SCISAT-1 are presented and compared with the output from the Chemical Transport Model (CTM) GEOS-Chem. The retrievals of ethane and ethyne from ACE have been improved for this paper by using new sets of microwindows compared with those for previous versions of ACE data. With the improved ethyne retrieval we have been able to produce a near global upper tropospheric distribution of C 2 H 2 from space. Carbon monoxide, ethane and ethyne concentrations retrieved using ACE spectra show the expected seasonality linked to variations in the anthropogenic emissions and destruction rates as well as seasonal biomass burning activity. The GEOS-Chem model was run using the dicarbonyl chemistry suite, an extended chemical mechanism in which ethyne is treated explicitly. Seasonal cycles observed from satellite data are well reproduced by the model output, however the simulated CO concentrations are found to be systematically biased low over the Northern Hemisphere. An average negative global mean bias of 12% and 7% of the model relative to the satellite observations has been found for CO and C 2 H 6 respectively and a positive global mean bias of 1% has been found for C 2 H 2 . ACE data are compared for validation purposes with MkIV spectrometer data and Global Tropospheric Experiment (GTE) TRACE-A campaign data showing good agreement with all of them.