Abstract. We introduce the new Global Ozone Monitoring Experiment-2 (GOME-2) daily and monthly level-3 product of total column ozone (O3), total and tropospheric column nitrogen dioxide (NO2), total column water vapour, total column bromine oxide (BrO), total column formaldehyde (HCHO), and total column sulfur dioxide (SO2) (daily products https://doi.org/10.15770/EUM_SAF_AC_0048, AC SAF, 2023a; monthly products https://doi.org/10.15770/EUM_SAF_AC_0049, AC SAF, 2023b). The GOME-2 level-3 products aim to provide easily translatable and user-friendly data sets to the scientific community for scientific progress as well as to satisfy public interest. The purpose of this paper is to present the theoretical basis as well as the verification and validation of the GOME-2 daily and monthly level-3 products. The GOME-2 level-3 products are produced using the overlapping area-weighting method. Details of the gridding algorithm are presented. The spatial resolution of the GOME-2 level-3 products is selected based on the sensitivity study. The consistency of the resulting level-3 products among three GOME-2 sensors is investigated through time series of global averages, zonal averages, and bias. The accuracy of the products is validated by comparison to ground-based observations. The verification and validation results show that the GOME-2 level-3 products are consistent with the level-2 data. Small discrepancies are found among three GOME-2 sensors, which are mainly caused by the differences in the instrument characteristic and level-2 processor. The comparison of GOME-2 level-3 products to ground-based observations in general shows very good agreement, indicating that the products are consistent and fulfil the requirements to serve the scientific community and general public.

中文翻译：

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全球臭氧监测实验二（GOME-2）大气痕量气柱日月三级产品

摘要。我们介绍了新的全球臭氧监测实验二（GOME-2）每日和每月三级产品的总气柱臭氧（O3）、总和对流层气柱二氧化氮（NO2）、总气柱水蒸气、总气柱氧化溴（ BrO)、总柱甲醛 (HCHO) 和总柱二氧化硫 (SO2)（日用产品 https://doi.org/10.15770/EUM_SAF_AC_0048，AC SAF，2023a；月用产品 https://doi.org/10.15770/ EUM_SAF_AC_0049，AC SAF，2023b）。GOME-2 level-3 产品旨在为科学界提供易于翻译和用户友好的数据集，以促进科学进步并满足公众利益。本文的目的是介绍 GOME-2 每日和每月 3 级产品的理论基础以及验证和验证。国美二代三级产品采用重叠面积加权法生产。给出了网格化算法的细节。GOME-2 level-3 产品的空间分辨率是根据灵敏度研究选择的。通过全球平均值、区域平均值和偏差的时间序列研究了三个 GOME-2 传感器之间生成的 3 级产品的一致性。产品的准确性通过与地面观测的比较得到验证。验证验证结果表明，国美二代的level-3产品与level-2数据一致。三个 GOME-2 传感器之间存在细微差异，这主要是由于仪器特性和二级处理器的差异造成的。GOME-2 level-3 产品与地面观测的比较总体上显示出非常好的一致性，