NO₂ retrievals from NOAA-20 OMPS: Algorithm, evaluation, and observations of drastic changes during COVID-19.

ABSTRACT: We present the first NO₂ measurements from the Nadir Mapper of Ozone Mapping and Profiler Suite (OMPS) instrument aboard the NOAA-20 satellite. NOAA-20 OMPS was launched in November 2017, with a nadir resolution of 17 × 13 km² similar to the Ozone Monitoring Instrument (OMI). The retrieval of NOAA-20 NO₂ vertical columns were achieved through the Direct Vertical Column Fitting (DVCF) algorithm, which was uniquely designed and successfully used to retrieve NO₂ from OMPS aboard Suomi National Polar-orbiting Partnership (SNPP) spacecraft, predecessor to NOAA-20. Observations from NOAA-20 reveal a 20-40% decline in regional tropospheric NO₂ in January-April 2020 due to COVID-19 lockdown, consistent with the findings from other satellite ob

SUBMITTER: Huang X 

PROVIDER: S-EPMC9441478 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature