Matches in SemOpenAlex for { <https://semopenalex.org/work/W3196398312> ?p ?o ?g. }
Showing items 1 to 91 of
91
with 100 items per page.
- W3196398312 endingPage "210153" @default.
- W3196398312 startingPage "210153" @default.
- W3196398312 abstract "We studied the impact of COVID-19 (coronavirus disease 2019) lockdown on the air quality over the Atlanta area using satellite and ground-based observations, meteorological reanalysis data and traffic information. Unlike other cities, we found the air quality has improved slightly over the Atlanta area during the 2020 COVID-19 lockdown period (March 14–April 30, 2020), compared to the analogous period of 2019 (March 14-April 30, 2019). Ground NO2 concentrations have decreased slightly 10.8% and 8.2% over the near-road (NR) and urban ambient (UA) stations, respectively. Tropospheric NO2 columns have reduced 13%-49% over the Atlanta area from space-borne observations of TROPOspheric Monitoring Instrument (TROPOMI). Ground ozone and PM2.5 have decreased 15.7% an ~5%, respectively. This slight air quality improvement is primarily caused by the reduced human activities, as COVID-19 lockdowns have reduced ~50% human activities, measured by traffic volume. Higher wind speed and precipitations also make the meteorological conditions favorable to this slight air quality improvement. We have not found a significant improvement in Atlanta amid the lockdown when human activities have reduced ~50%. Further studies are needed to understand the impacts of reduced human activities on atmospheric chemistry. We also found TROPOMI and ground measurements have disagreements on NO2 reductions, as collocated TROPOMI observations revealed ~23% and ~21% reductions of tropospheric NO2 columns over NR and UA stations, respectively. Several factors may explain this disagreement: First, tropospheric NO2 columns and ground NO2 concentrations are not necessarily the same, although they are highly correlated in the afternoon; Second, meteorological conditions may have different impacts on TROPMI and ground measurements. Third, TROPOMI may underestimate tropospheric NO2 due to uncertainties from air mass factors. Fourth, the uncertainties of chemiluminescence NO2 measurements used by ground stations. Consequently, studies using space-borne tropospheric NO2 column and ground NO2 measurements should take these factors into account." @default.
- W3196398312 created "2021-09-13" @default.
- W3196398312 creator A5001562715 @default.
- W3196398312 creator A5010744182 @default.
- W3196398312 creator A5016820072 @default.
- W3196398312 creator A5058907520 @default.
- W3196398312 creator A5076745341 @default.
- W3196398312 creator A5078381738 @default.
- W3196398312 creator A5078421044 @default.
- W3196398312 date "2021-01-01" @default.
- W3196398312 modified "2023-10-16" @default.
- W3196398312 title "Unexpected Impact of COVID-19 Lockdown on the Air Quality in the Metro Atlanta, USA Using Ground-based and Satellite Observations" @default.
- W3196398312 doi "https://doi.org/10.4209/aaqr.210153" @default.
- W3196398312 hasPublicationYear "2021" @default.
- W3196398312 type Work @default.
- W3196398312 sameAs 3196398312 @default.
- W3196398312 citedByCount "4" @default.
- W3196398312 countsByYear W31963983122022 @default.
- W3196398312 countsByYear W31963983122023 @default.
- W3196398312 crossrefType "journal-article" @default.
- W3196398312 hasAuthorship W3196398312A5001562715 @default.
- W3196398312 hasAuthorship W3196398312A5010744182 @default.
- W3196398312 hasAuthorship W3196398312A5016820072 @default.
- W3196398312 hasAuthorship W3196398312A5058907520 @default.
- W3196398312 hasAuthorship W3196398312A5076745341 @default.
- W3196398312 hasAuthorship W3196398312A5078381738 @default.
- W3196398312 hasAuthorship W3196398312A5078421044 @default.
- W3196398312 hasBestOaLocation W31963983121 @default.
- W3196398312 hasConcept C126314574 @default.
- W3196398312 hasConcept C127313418 @default.
- W3196398312 hasConcept C127413603 @default.
- W3196398312 hasConcept C142724271 @default.
- W3196398312 hasConcept C146978453 @default.
- W3196398312 hasConcept C153294291 @default.
- W3196398312 hasConcept C158739034 @default.
- W3196398312 hasConcept C166957645 @default.
- W3196398312 hasConcept C19269812 @default.
- W3196398312 hasConcept C205649164 @default.
- W3196398312 hasConcept C2776349674 @default.
- W3196398312 hasConcept C2778037673 @default.
- W3196398312 hasConcept C2779134260 @default.
- W3196398312 hasConcept C2910478969 @default.
- W3196398312 hasConcept C3008058167 @default.
- W3196398312 hasConcept C39432304 @default.
- W3196398312 hasConcept C508106653 @default.
- W3196398312 hasConcept C524204448 @default.
- W3196398312 hasConcept C71924100 @default.
- W3196398312 hasConcept C9075549 @default.
- W3196398312 hasConcept C91586092 @default.
- W3196398312 hasConceptScore W3196398312C126314574 @default.
- W3196398312 hasConceptScore W3196398312C127313418 @default.
- W3196398312 hasConceptScore W3196398312C127413603 @default.
- W3196398312 hasConceptScore W3196398312C142724271 @default.
- W3196398312 hasConceptScore W3196398312C146978453 @default.
- W3196398312 hasConceptScore W3196398312C153294291 @default.
- W3196398312 hasConceptScore W3196398312C158739034 @default.
- W3196398312 hasConceptScore W3196398312C166957645 @default.
- W3196398312 hasConceptScore W3196398312C19269812 @default.
- W3196398312 hasConceptScore W3196398312C205649164 @default.
- W3196398312 hasConceptScore W3196398312C2776349674 @default.
- W3196398312 hasConceptScore W3196398312C2778037673 @default.
- W3196398312 hasConceptScore W3196398312C2779134260 @default.
- W3196398312 hasConceptScore W3196398312C2910478969 @default.
- W3196398312 hasConceptScore W3196398312C3008058167 @default.
- W3196398312 hasConceptScore W3196398312C39432304 @default.
- W3196398312 hasConceptScore W3196398312C508106653 @default.
- W3196398312 hasConceptScore W3196398312C524204448 @default.
- W3196398312 hasConceptScore W3196398312C71924100 @default.
- W3196398312 hasConceptScore W3196398312C9075549 @default.
- W3196398312 hasConceptScore W3196398312C91586092 @default.
- W3196398312 hasIssue "11" @default.
- W3196398312 hasLocation W31963983121 @default.
- W3196398312 hasOpenAccess W3196398312 @default.
- W3196398312 hasPrimaryLocation W31963983121 @default.
- W3196398312 hasRelatedWork W2051209490 @default.
- W3196398312 hasRelatedWork W2071335294 @default.
- W3196398312 hasRelatedWork W2123370840 @default.
- W3196398312 hasRelatedWork W2149357482 @default.
- W3196398312 hasRelatedWork W4237293331 @default.
- W3196398312 hasRelatedWork W4238781103 @default.
- W3196398312 hasRelatedWork W4241652688 @default.
- W3196398312 hasRelatedWork W4299322449 @default.
- W3196398312 hasRelatedWork W4303696414 @default.
- W3196398312 hasRelatedWork W4383875794 @default.
- W3196398312 hasVolume "21" @default.
- W3196398312 isParatext "false" @default.
- W3196398312 isRetracted "false" @default.
- W3196398312 magId "3196398312" @default.
- W3196398312 workType "article" @default.