Journal cover Journal topic
Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 3.400 IF 3.400
  • IF 5-year value: 3.841 IF 5-year
    3.841
  • CiteScore value: 3.71 CiteScore
    3.71
  • SNIP value: 1.472 SNIP 1.472
  • IPP value: 3.57 IPP 3.57
  • SJR value: 1.770 SJR 1.770
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 70 Scimago H
    index 70
  • h5-index value: 49 h5-index 49
Discussion papers
https://doi.org/10.5194/amt-2019-123
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2019-123
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 14 May 2019

Research article | 14 May 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Atmospheric Measurement Techniques (AMT).

Underestimation of Column NO2 Amounts from the OMI Satellite Compared to Diurnally Varying Ground-Based Retrievals from Multiple Pandora Spectrometer Instruments

Jay Herman1, Nader Abuhassan1, Jhoon Kim2, Jae Kim3, Mavendra Dubey4, Marcelo Raponi5, and Maria Tzortziou6 Jay Herman et al.
  • 1University of Maryland Baltimore County JCET, Maryland
  • 2Department of Atmospheric Sciences, Yonsei National University, South Korea
  • 3Department of Atmospheric Science, Pusan National University, South Korea
  • 4Earth Systems Observations, Los Alamos National Laboratory, Los Alamos, NM 87545
  • 5Departamento de Investigaciones en Láseres y Aplicaciones (DEILAP), Instituto de Investigaciones Científicas y Técnicas para la Defensa (CITEDEF), Ministerio de Defensa (MINDEF), Buenos Aires, Argentina
  • 6City College of New York, New York City, NY

Abstract. Retrievals of Total Column NO2 (TCNO2) are compared for 14 sites from the Ozone Measuring Instrument (OMI using OMNO2-NASA v3.1) on the AURA satellite and from multiple ground-based PANDORA spectrometer instruments making direct-sun measurements. Six of these sites with multi-year PANDORA data records are in the Northern Hemisphere (Busan, Seoul, Washington DC, Waterflow New Mexico, Boulder Colorado, and Mauna Loa) and one site in the Southern Hemisphere (Buenos Aires Argentina). The first four of these sites and Buenos Aires frequently have high TCNO2 (TCNO2 > 0.5 DU) and are likely have significant air quality problems that can affect human health. Eight additional sites have shorter term data records in the US and South Korea. One of these is a one-year data record from a highly polluted site at City College in New York City with pollution levels comparable to Seoul, South Korea. The result is that on a weekly or monthly average basis, OMI almost always underestimates the amount TCNO2 by 50 to 100 %, while occasionally the daily OMI value exceeds that measured by PANDORA at very clean sites. OMI estimated air mass factor, surface reflectivity, and the OMI 24 x 13 km2 FOV (field of view) are three factors that can cause OMI to underestimate TCNO2. Because of the local inhomogeneity of NO2 emissions, the large OMI FOV is the most likely factor when comparing OMI TCNO2 to retrievals from the small PANDORA effective FOV calculated from the solar diameter of 0.5°. As part of air quality assessments, OMI always misses the frequently much higher values of TCNO2 that occur after the OMI overpass time.

Jay Herman et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Jay Herman et al.
Jay Herman et al.
Viewed  
Total article views: 294 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
201 90 3 294 2 1
  • HTML: 201
  • PDF: 90
  • XML: 3
  • Total: 294
  • BibTeX: 2
  • EndNote: 1
Views and downloads (calculated since 14 May 2019)
Cumulative views and downloads (calculated since 14 May 2019)
Viewed (geographical distribution)  
Total article views: 272 (including HTML, PDF, and XML) Thereof 270 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 18 Jul 2019
Publications Copernicus
Download
Short summary
Total Column NO2 TCNO2 from the Ozone Measuring Instrument OMI are compared for 14 sites with ground-based PANDORA spectrometer instruments making direct-sun measurements. These sites have high TCNO2 and significant air quality problems that can affect human health. OMI almost always underestimates the amount TCNO2 by 50 to 100 %. OMI's large field of view FOV is the most likely factor when comparing OMI TCNO2 to retrievals with PANDORA. OMI misses higher afternoon values of TCNO2.
Total Column NO2 TCNO2 from the Ozone Measuring Instrument OMI are compared for 14 sites with...
Citation