Simultaneous global observations of glyoxal and formaldehyde from space
Simultaneous global observations of glyoxal and formaldehyde from space
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DOI：
10.1029/2006gl026310
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发表时间：
2006-08
影响因子：
5.2
通讯作者：
F. Wittrock;A. Richter;H. Oetjen;J. Burrows;M. Kanakidou;S. Myriokefalitakis;R. Volkamer;S. Beirle-S.-Beir
中科院分区：
文献类型：
--
作者：
F. Wittrock;A. Richter;H. Oetjen;J. Burrows;M. Kanakidou;S. Myriokefalitakis;R. Volkamer;S. Beirle-S.-Beir
首次对乙二醛 (CHOCHO) 和甲醛 (HCHO) 柱进行全球同步观测，这些观测数据是通过大气制图扫描成像吸收光谱仪 (SCIAMACHY) 卫星仪器的测量结果检索到的，并与模型计算进行了比较。 CHOCHO 的全球分布格局与 HCHO 相似。在生物异戊二烯排放量较大的地区（非洲中部、南美洲部分地区和印度尼西亚）观察到了较高的值。生物质燃烧和人为污染的地区也表现出 CHOCHO 水平升高。在有生物排放的地区，CHOCHO 与 HCHO 柱的比率通常为 0.05 左右，这与目前对生物圈排放碳氢化合物氧化的认识相当一致。然而，与我们的模型相反，在热带海洋区域也观察到 HCHO 和 CHOCHO 的高值。这暂时归因于 HCHO 和 CHOCHO 前体的大陆和当地海洋生物来源的流出。
The first global simultaneous observations of glyoxal (CHOCHO) and formaldehyde (HCHO) columns retrieved from measurements by the Scanning Imaging Absorption Spectrometer for Atmospheric Cartography (SCIAMACHY) satellite instrument are presented and compared to model calculations. The global pattern of the distribution of CHOCHO is similar to that of HCHO. High values are observed over areas with large biogenic isoprene emissions (Central Africa, parts of South America, and Indonesia). Also regions with biomass burning and anthropogenic pollution exhibit elevated levels of CHOCHO. The ratio of the columns of CHOCHO to HCHO is generally of the order of 0.05 in regions having biogenic emissions, which is in reasonable agreement with the current understanding of the oxidation of hydrocarbons emitted by the biosphere. However and in contrast to our model, high values of both HCHO and CHOCHO are also observed over areas of the tropical oceans. This is tentatively attributed to outflow from the continents and local oceanic biogenic sources of the precursors of HCHO and CHOCHO.