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- W3157791250 abstract "Abstract Satellite nitrogen dioxide (NO 2 ) measurements are used extensively to infer nitrogen oxide emissions and their trends, but interpretation can be complicated by background contributions to the NO 2 column sensed from space. We use the step decrease of US anthropogenic emissions from the COVID‐19 shutdown to compare the responses of NO 2 concentrations observed at surface network sites and from satellites (Ozone Monitoring Instrument [OMI], Tropospheric Ozone Monitoring Instrument [TROPOMI]). After correcting for differences in meteorology, surface NO 2 measurements for 2020 show decreases of 20% in March–April and 10% in May–August compared to 2019. The satellites show much weaker responses in March–June and no decrease in July–August, consistent with a large background contribution to the NO 2 column. Inspection of the long‐term OMI trend over remote US regions shows a rising summertime NO 2 background from 2010 to 2019 potentially attributable to wildfires." @default.
- W3157791250 created "2021-05-10" @default.
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- W3157791250 date "2021-05-18" @default.
- W3157791250 modified "2023-10-04" @default.
- W3157791250 title "US COVID‐19 Shutdown Demonstrates Importance of Background NO<sub>2</sub> in Inferring NO<sub>x</sub> Emissions From Satellite NO<sub>2</sub> Observations" @default.
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- W3157791250 doi "https://doi.org/10.1029/2021gl092783" @default.
- W3157791250 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8206743" @default.
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