Comparison between ozonesonde measurements and satellite retrievals over Beijing, China

The authors built an electrochemical concentration cell ozonesonde and have been launching it weekly from Beijing on the North China Plain since 2013. This study is the first to use ozonesonde measurements collected over Beijing during 2013–2019 to evaluate vertical ozone profiles derived from the Atmospheric Infrared Sounder (AIRS) onboard the Aqua satellite and Microwave Limb Sounder (MLS) onboard the Aura satellite. The total column ozone calculated from the ozonesonde measurements is also compared with retrievals from AIRS and the Ozone Monitoring Instrument (OMI) onboard the Aura platform. Overall, the ozonesonde measurements and satellite retrievals show similar variability in the ozone profiles (with a relative difference mostly < 10%), albeit with a relatively large discrepancy arising at certain levels. The total column ozone derived from the three instruments shows reasonable agreement and similar annual variation. The annual average total column ozone is 351.8 ± 18.4 DU, 348.8 ± 19.5 DU, and 336.9 ± 14.2 DU for the ozonesonde, AIRS, and OMI, respectively. Further comparative analysis of ozonesonde data collected in the future from multiple sites in China will improve the understanding of their consistency with satellite retrievals over different regions in China.

摘要

从2013年开始, 作者团队使用自主研发电化学原理臭氧探空仪在华北平原北京地区进行每周一次观测. 本研究首次使用2013–2019年期间北京地区臭氧探空数据评估Aqua卫星搭载大气红外探测仪 (AIRS) 和Aura卫星搭载微波临边探测器 (MLS) 反演垂直臭氧廓线, 并对比臭氧探空, AIRS和Aura卫星搭载臭氧监测仪 (OMI) 臭氧柱总量结果. 尽管臭氧探空与卫星反演垂直臭氧廓线在局部高度处差异较大, 但整体来说两者较为接近 (相对偏差大多<10%). 臭氧探空, AIRS和OMI三种仪器测量臭氧柱总量的年变化特征较为一致, 其年均臭氧柱总量分别为351.8 ± 18.4 DU, 348.8 ± 19.5 DU和336.9 ± 14.2 DU. 后续对国内多站点观测数据分析将有助于进一步理解臭氧探空与卫星反演臭氧资料在不同区域的一致性.