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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Validation of GOMOS-Envisat vertical profiles of O_3, NO_2, NO_3, and aerosol extinction using balloon-borne instruments and analysis of the retrievals
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Validation of GOMOS-Envisat vertical profiles of O_3, NO_2, NO_3, and aerosol extinction using balloon-borne instruments and analysis of the retrievals

机译：验证GOMOS-Envisat垂直的O_3, NO_2、NO_3和气溶胶消光气球携带的仪器和分析检索

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摘要

The UV-visible Global Ozone Monitoring by Occultation of Stars (GOMOS) instrument onboard Envisat performs nighttime measurements of ozone, NO2, NO3 and of the aerosol extinction, using the stellar occultation method. We have conducted a validation exercise using various balloon-borne instruments in different geophysical conditions from 2002 to 2006, using GOMOS measurements performed with stars of different magnitudes. GOMOS and balloon-borne vertical columns in the middle stratosphere are in excellent agreement for ozone and NO2. Some discrepancies can appear between GOMOS and balloon-borne vertical profiles for the altitude and the amplitude of the concentration maximum. These discrepancies are randomly distributed, and no bias is detected. The accuracy of individual profiles in the middle stratosphere is 10 % for ozone and 25 % for NO2. On the other hand, the GOMOS NO3 retrieval is difficult and no direct validation can be conducted. The GOMOS aerosol content is also well estimated, but the wavelength dependence can be better estimated if the aerosol retrieval is performed only in the visible domain. We can conclude that the GOMOS operational retrieval algorithm works well and that GOMOS has fully respected its primary objective for the study of the trends of species in the middle stratosphere, using the profiles in a statistical manner. Some individual profiles can be partly inaccurate, in particular in the lower stratosphere. Improvements could be obtained by reprocessing some GOMOS transmissions in case of specific studies in the middle and lower stratosphere when using the individual profiles.
机译：紫外可见全球臭氧监测掩星的恒星(GOMOS)仪器上环境执行夜间测量臭氧,NO2, NO3和气溶胶消光的使用恒星掩蔽的方法。使用各种气球携带验证运动仪器在不同地球物理条件从2002年到2006年,使用GOMOS测量与明星不同的大小。GOMOS和气球携带垂直列中产平流层的协议臭氧和二氧化氮。GOMOS和气球携带之间垂直的概要文件的高度和振幅浓度最大。随机分布的,没有偏见。个人资料的准确性在中间平流层臭氧和二氧化氮为25% 10%。另一方面,GOMOS NO3检索困难和没有直接验证进行的。估计,但波长依赖性更好的估计如果气溶胶检索只有在执行域可见。得出结论,GOMOS操作检索算法适用GOMOS完全尊敬的研究的主要目标中间物种平流层的趋势,使用配置文件统计的方式。个人概要文件可以部分不准确,特别是低平流层。改进可以通过后处理一些GOMOS传输特定的研究在中低平流层使用个人资料。

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