skip to main content
Language:
Search Limited to: Search Limited to: Resource type Show Results with: Show Results with: Search type Index

Derivation of Emissions From Satellite‐Observed Column Amounts and Its Application to TROPOMI NO2 and CO Observations

Geophysical research letters, 2022-12, Vol.49 (23), p.n/a [Peer Reviewed Journal]

2022 The Authors. ;2022. This article is published under http://creativecommons.org/licenses/by-nc/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 0094-8276 ;EISSN: 1944-8007 ;DOI: 10.1029/2022GL101102

Full text available

Citations Cited by
  • Title:
    Derivation of Emissions From Satellite‐Observed Column Amounts and Its Application to TROPOMI NO2 and CO Observations
  • Author: Sun, Kang
  • Subjects: Air pollution ; Algorithms ; Atmospheric diffusion ; Atmospheric dispersion ; Carbon monoxide emissions ; Chemical effects ; Chemical reactions ; COVID-19 ; Divergence ; Emission analysis ; Emissions ; First principles ; Frameworks ; Industrial plant emissions ; Instruments ; Mass balance ; Monitoring instruments ; Nitrogen compounds ; Nitrogen dioxide ; Nitrogen oxides ; Nitrogen oxides emissions ; Pandemics ; Photochemicals ; Pollutants ; Pollution dispersion ; Pollution monitoring ; Power plants ; Roads ; Satellite instruments ; Satellite observation ; Satellites ; Scale height ; Topographic effects ; Troposphere ; Wind
  • Is Part Of: Geophysical research letters, 2022-12, Vol.49 (23), p.n/a
  • Description: A unified framework that connects emissions with satellite‐observed column amounts is derived from first principles. The emission information originates from the inner product of the horizontal wind and the gradient of column amount, which is more accurate than the horizontal flux divergence as used in previous studies. Additionally, the topographical and chemical effects are accounted for through fitted scale height and chemical lifetime. This framework is applied to derive NOx and CO emissions over the CONUS from TROPOspheric Monitoring Instrument NO2 and CO observations. High‐resolution (0.04°) emission mapping over the CONUS reveals unprecedented details, including CO emissions in major cities and NOx emissions from large cities, power plants, and major roadways. Monthly resolved NOx emissions show decrease and rebound after the COVID‐19 pandemic. This framework is integrated with the physical oversampling algorithm and can be readily applied to other products from the new‐generation satellite instruments. Plain Language Summary Satellites usually measure the vertically integrated column amount of atmospheric species from space. For short‐lived species like nitrogen oxides, the observed column amount indicates location and strength of emission sources. However, atmospheric dispersion smears the relationship between emission and column amount as the lifetime of species gets longer. This study directly maps emission based on the principle of mass balance. Namely, the spatial gradient of column amount should align with horizontal wind if there is an emission. Additionally, topography and chemical reaction may cause spatial gradients of column amount that are unrelated to emissions and are accounted for. Unprecedented details in the emission of air pollutants are unveiled by applying this approach to the TROPOspheric Monitoring Instrument products. Key Points A unified framework that connects emissions with satellite‐observed column amounts is derived from the principle of mass conservation Wind divergence, topography, and chemistry are considered, making this framework applicable to a range of atmospheric species Unprecedented details in the emissions of air pollutants are unveiled by applying this framework to TROPOspheric Monitoring Instrument NO2 and CO products
  • Publisher: Washington: John Wiley & Sons, Inc
  • Language: English
  • Identifier: ISSN: 0094-8276
    EISSN: 1944-8007
    DOI: 10.1029/2022GL101102
  • Source: Wiley Online Library
Back to results list
INSPIRE LIBRARY - TON DUC THANG UNIVERSITY (84-028) 37 755 057 Feedback
19 Nguyen Huu Tho St. Dist.7, HCM thuvien@tdtu.edu.vn

Copyright © 2017 INSPIRE LIBRARY - TON DUC THANG UNIVERSITY

Searching Remote Databases, Please Wait