US COVID-19 shutdown shows importance of background NO2 in inferring nitrogen oxide (NOx) emissions from satellite NO2 observations (N/A limited co-author role)

Data used in this study are: (1) 24 hour averaged surface NO2 data for March-August for 2019 & 2020; (2) a total of about 328 AQS sites that have no data gaps; (3) a trend analysis for a subset of those AQS sites that extends back to 2005; and (4) OMI (2005-2020) and TROPOMI (2018-2020) satellite-based data for NO2 tropospheric columns. Note that OMI and TROPOMI make swath measurements from low Earth sun-synchronous polar orbit (i.e., global coverage each day at approximately 1 PM local standard time).

For data associated with this paper, please contact the corresponding author Zhen Qu at zhenqu@g.harvard.edu. This dataset is not publicly accessible because: Role in this research effort as limited advisor / manuscript co-author on non-EPA and publicly available AQS datasets. It can be accessed through the following means: For data associated with this paper, contact the primary author Zhen Qu at zhenqu@g.harvard.edu. Format: N/A.

This dataset is associated with the following publication: Qu, Z., D. Jacob, R. Silvern, V. Shah, P.C. Campbell, L. Valin, and L. Murray. US COVID-19 Shutdown Demonstrates Importance of Background NO2 in Inferring NOx Emissions From Satellite NO2 Observations. GEOPHYSICAL RESEARCH LETTERS. American Geophysical Union, Washington, DC, USA, 48(10): e2021GL092783, (2021).

Data and Resources

This dataset has no data

Field Value
accessLevel public
bureauCode {020:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
identifier https://doi.org/10.23719/1520960
license https://pasteur.epa.gov/license/sciencehub-license-non-epa-generated.html
modified 2020-12-01
programCode {020:000}
publisher U.S. EPA Office of Research and Development (ORD)
publisher_hierarchy U.S. Government > U.S. Environmental Protection Agency > U.S. EPA Office of Research and Development (ORD)
references {https://doi.org/10.1029/2021gl092783}
resource-type Dataset
source_datajson_identifier true
source_hash 466118d58faaeaeca5744f4f6e5622c90cbc4097
source_schema_version 1.1
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • air-emissions
  • air-quality
  • amerigeo
  • amerigeoss
  • ckan
  • geo
  • geoss
  • national
  • nitrogen-dioxide
  • north-america
  • satellite
  • united-states
isopen False
license_id other-license-specified
license_title other-license-specified
maintainer Lukas Valin
maintainer_email valin.lukas@epa.gov
metadata_created 2025-11-21T21:08:22.373105
metadata_modified 2025-11-21T21:08:22.373109
notes Data used in this study are: (1) 24 hour averaged surface NO2 data for March-August for 2019 & 2020; (2) a total of about 328 AQS sites that have no data gaps; (3) a trend analysis for a subset of those AQS sites that extends back to 2005; and (4) OMI (2005-2020) and TROPOMI (2018-2020) satellite-based data for NO2 tropospheric columns. Note that OMI and TROPOMI make swath measurements from low Earth sun-synchronous polar orbit (i.e., global coverage each day at approximately 1 PM local standard time). For data associated with this paper, please contact the corresponding author Zhen Qu at zhenqu@g.harvard.edu. This dataset is not publicly accessible because: Role in this research effort as limited advisor / manuscript co-author on non-EPA and publicly available AQS datasets. It can be accessed through the following means: For data associated with this paper, contact the primary author Zhen Qu at zhenqu@g.harvard.edu. Format: N/A. This dataset is associated with the following publication: Qu, Z., D. Jacob, R. Silvern, V. Shah, P.C. Campbell, L. Valin, and L. Murray. US COVID-19 Shutdown Demonstrates Importance of Background NO2 in Inferring NOx Emissions From Satellite NO2 Observations. GEOPHYSICAL RESEARCH LETTERS. American Geophysical Union, Washington, DC, USA, 48(10): e2021GL092783, (2021).
num_resources 0
num_tags 12
title US COVID-19 shutdown shows importance of background NO2 in inferring nitrogen oxide (NOx) emissions from satellite NO2 observations (N/A limited co-author role)