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首页> 外文期刊>Journal of Quantitative Spectroscopy & Radiative Transfer >First global observations of atmospheric COClF from the Atmospheric Chemistry Experiment mission
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First global observations of atmospheric COClF from the Atmospheric Chemistry Experiment mission

机译:大气化学实验任务对大气COClF的首次全球观测

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摘要

Carbonyl chlorofluoride (COClF) is an important reservoir of chlorine and fluorine in the Earth's atmosphere. Satellite-based remote sensing measurements of COClF, obtained by the Atmospheric Chemistry Experiment (ACE) for a time period spanning February 2004 through April 2007, have been used in a global distribution study. There is a strong source region for COClF in the tropical stratosphere near 27 km. A layer of enhanced COClF spans the low- to mid-stratosphere over all latitudes, with volume mixing ratios of 40-100 parts per trillion by volume, largest in the tropics and decreasing toward the poles. The COClF volume mixing ratio profiles are nearly zonally symmetric, but they exhibit a small hemispheric asymmetry that likely arises from a hemispheric asymmetry in the parent molecule CCl3F. Comparisons are made with a set of in situ stratospheric measurements from the mid-1980s and with predictions from a 2-D model.
机译:羰基氯氟化物(COClF)是地球大气中氯和氟的重要储存库。全球分布研究使用了大气化学实验(ACE)在2004年2月至2007年4月期间获得的基于卫星的COClF遥感测量值。在27公里附近的热带平流层中,有很强的COClF源区。一层增强的COClF层覆盖了整个纬度的低层至中层平流层,体积混合比为40-100亿分之一体积(体积),在热带地区最大,而向两极递减。 COClF体积混合比分布几乎是区域对称的,但它们显示出较小的半球不对称性,这很可能是由母体分子CCl3F中的半球不对称性引起的。比较了1980年代中期的一组平流层原地测量结果和二维模型的预测结果。

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