Changes in satellite retrievals of atmospheric composition over eastern China during the 2020 COVID-19 lockdowns

doi:10.5194/acp-2020-567

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-567
	Changes in satellite retrievals of atmospheric composition over eastern China during the 2020 COVID-19 lockdowns
	Robert D. Field, Jonathan E. Hickman, Igor V. Geogdzhayev, Kostas Tsigaridis, and Susanne E. Bauer
	2020-07-16
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
英文摘要	We examined daily Level-3 satellite retrievals of AIRS CO, OMI SO₂ and NO₂, and MODIS AOD over eastern China to understand how COVID-19 lockdowns affected atmospheric composition, taking into account trends that have occurred since 2005. Over central east China during the January 23–April 8 lockdown window, CO in 2020 was 12 % lower than the 2005–2019 mean, but only 2 % lower than what would be expected given the decreasing CO trend over that period. Similarly for AOD, 2020 was 30 % lower than the 2011–2019 mean, but not distinct from what would be expected from the trend. NO₂ in 2020 was 43 % lower than the 2011–2019 mean, but only 17 % lower than what would be expected given the trend over that period. Over southern China, 2020 NO₂ was not significantly different from anticipated, and CO and AOD were significantly higher that what would be expected, which we suggest was partly because of an active fire season in neighbouring countries. Over east central and southern China, SO₂ was higher than expected, but the magnitude depended strongly on how daily regional values were calculated from individual retrievals. Future work over China, or other regions, needs to take these trends into account in order to separate the effects of COVID-19 on air quality from recent trends, or from variability in other sources.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/284177
专题	地球科学
推荐引用方式 GB/T 7714	Robert D. Field, Jonathan E. Hickman, Igor V. Geogdzhayev, Kostas Tsigaridis, and Susanne E. Bauer. Changes in satellite retrievals of atmospheric composition over eastern China during the 2020 COVID-19 lockdowns[J]. Atmospheric Chemistry and Physics,2020.
APA	Robert D. Field, Jonathan E. Hickman, Igor V. Geogdzhayev, Kostas Tsigaridis, and Susanne E. Bauer.(2020).Changes in satellite retrievals of atmospheric composition over eastern China during the 2020 COVID-19 lockdowns.Atmospheric Chemistry and Physics.
MLA	Robert D. Field, Jonathan E. Hickman, Igor V. Geogdzhayev, Kostas Tsigaridis, and Susanne E. Bauer."Changes in satellite retrievals of atmospheric composition over eastern China during the 2020 COVID-19 lockdowns".Atmospheric Chemistry and Physics (2020).