Abstract. Comparisons between total ozone column (TOC) measurements from ground-based Dobson and Brewer spectrophotometers and from various satellite instruments generally reveal seasonally varying differences of a few percent. A large part of these differences has been attributed to the operationally used Bass and Paur ozone cross sections and the lack of accounting for varying stratospheric temperatures in the standard total ozone retrieval for Dobson. This paper demonstrates how the use of new ozone absorption cross sections from the University of Bremen (Weber et al., 2016), as recommended by the Absorption Cross Sections of Ozone (ACSO) committee; the application of appropriate slit functions, especially for the Dobson instrument (Bernhard et al., 2005); and the use of climatological values for the effective ozone layer temperature (Teff), e.g., from TEMIS (Tropospheric Emission Monitoring Internet Service), essentially eliminate these seasonally varying differences between Brewer and Dobson total ozone data (to generally less than ±0.5 %). For Hohenpeissenberg, the previous seasonal difference (close to 0 % in summer and up to 2.5 % in winter) is reduced to less than ±0.5 % year-round. Implementing this approach to the existing global network of Dobson spectrometers will reduce the overall uncertainty in their total ozone data from 3 % to 4 % previously to under 2 % at most locations.

中文翻译：

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多布森和布鲁尔总臭氧测量过渡到新的臭氧吸收截面

摘要。地面多布森分光光度计和布鲁尔分光光度计与各种卫星仪器的总臭氧柱 (TOC) 测量值之间的比较通常会显示出几个百分点的季节性变化差异。这些差异的很大一部分归因于实际使用的巴斯和保尔臭氧截面以及多布森标准总臭氧反演中缺乏考虑不同平流层温度的因素。本文展示了如何按照臭氧吸收截面 (ACSO) 委员会的建议，使用不莱梅大学的新臭氧吸收截面（Weber 等，2016）；应用适当的狭缝函数，特别是对于 Dobson 仪器（Bernhard 等，2005）；以及使用有效臭氧层温度 (Teff) 的气候值，例如来自 TEMIS（对流层排放监测互联网服务）的气候值，从根本上消除了 Brewer 和 Dobson 总臭氧数据之间的季节性变化差异（一般小于 ±0.5%） 。对于 Hohenpeissenberg 来说，之前的季节差异（夏季接近 0%，冬季高达​​ 2.5%）全年减少至 ±0.5% 以下。在现有的多布森光谱仪全球网络中实施这种方法，将在大多数地点将臭氧总量数据的整体不确定性从之前的 3% 至 4% 降低到 2% 以下。