Updated OMI Glyoxal Column Measurements Using Collection 4 Level 1B Radiances

IF 2.9 3区 地球科学 Q2 ASTRONOMY & ASTROPHYSICS
Hyeong-Ahn Kwon, Gonzalo González Abad, Christopher Chan Miller, Kirsten R. Hall, Caroline R. Nowlan, Ewan O’Sullivan, Huiqun Wang, Heesung Chong, Zolal Ayazpour, Xiong Liu, Kelly Chance
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Abstract

This study presents new glyoxal (CHOCHO) products from the Ozone Monitoring Instrument (OMI) by utilizing updated level 1B irradiance/radiance data (Collection 4) and an updated glyoxal retrieval algorithm. The adoption of Collection 4 contributes to the reduction of artificial signals in differential glyoxal slant column densities (dSCDs) and improved fitting root mean square, and the updated retrieval settings result in fewer negative values of glyoxal dSCDs over oceans and less noisy dSCDs in the South Atlantic Anomaly. On-line calculations of air mass factors consider interactive physical processes between input parameters. To address persistent trends in glyoxal SCDs over the Pacific Ocean that remain despite these updates, a trend correction is implemented. We evaluate the updated OMI glyoxal products using inter-comparisons with GOME-2A/2B glyoxal products. OMI glyoxal products exhibit good spatial and temporal agreement with GOME-2A/2B, with correlation coefficients of 0.75–0.78 globally and 0.84–0.85 over source regions. Small biases are observed in OMI glyoxal vertical column densities, ranging from −0.2 ± 5.7% to 9 ± 3% in low and high glyoxal conditions, respectively, against GOME-2A/2B. These advancements contribute to the reliability and accuracy of OMI glyoxal products, enhancing their utility for atmospheric studies and enabling a 20-year-long data record suitable for climate studies.

Abstract Image

使用第 4 号采集 1B 级辐射测量更新的 OMI 乙二醛柱测量结果
本研究利用更新的 1B 级辐照度/辐照度数据(采集 4)和更新的乙二醛检索算法,展示了臭氧监测仪(OMI)的新乙二醛(CHOCHO)产品。采用收集 4 有助于减少乙二醛斜柱密度(dSCDs)差分中的人为信号,改进拟合均方根,更新的检索设置使海洋上空的乙二醛斜柱密度负值更少,南大西洋异常区的斜柱密度噪声更小。气团因子的在线计算考虑了输入参数之间的交互物理过程。尽管进行了这些更新,但太平洋上空乙二醛 SCDs 的趋势依然存在,为了解决这一问题,我们进行了趋势校正。我们通过与 GOME-2A/2B 乙二醛产品的相互比较,对更新的 OMI 乙二醛产品进行了评估。OMI 乙二醛产品与 GOME-2A/2B 产品在空间和时间上具有良好的一致性,全球相关系数为 0.75-0.78,源区相关系数为 0.84-0.85。与 GOME-2A/2B 相比,OMI 乙二酸垂直柱密度的偏差较小,在低乙二酸和高乙二酸条件下分别为 -0.2 ± 5.7% 到 9 ± 3%。这些进步有助于提高海洋监测仪乙二醛产品的可靠性和准确性,增强其在大气研究中的实用性,并使适合气候研究的长达 20 年的数据记录成为可能。
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来源期刊
Earth and Space Science
Earth and Space Science Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
5.50
自引率
3.20%
发文量
285
审稿时长
19 weeks
期刊介绍: Marking AGU’s second new open access journal in the last 12 months, Earth and Space Science is the only journal that reflects the expansive range of science represented by AGU’s 62,000 members, including all of the Earth, planetary, and space sciences, and related fields in environmental science, geoengineering, space engineering, and biogeochemistry.
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