Journal metrics

Journal metrics

  • IF value: 3.248 IF 3.248
  • IF 5-year value: 3.650 IF 5-year 3.650
  • CiteScore value: 3.37 CiteScore 3.37
  • SNIP value: 1.253 SNIP 1.253
  • SJR value: 1.869 SJR 1.869
  • IPP value: 3.29 IPP 3.29
  • h5-index value: 47 h5-index 47
  • Scimago H index value: 60 Scimago H index 60
Discussion papers | Copyright
https://doi.org/10.5194/amt-2018-56
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 03 Apr 2018

Research article | 03 Apr 2018

Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Atmospheric Measurement Techniques (AMT) and is expected to appear here in due course.

NO2 and HCHO measurements in Korea from 2012 to 2016 from Pandora Spectrometer Instruments compared with OMI retrievals and with aircraft measurements during the KORUS-AQ campaign

Jay Herman1, Elena Spinei2, Alan Fried3, Jhoon Kim4, Jae Kim5, Woogyung Kim3, Alexander Cede6, Nader Abuhassan1, and Michal Segal-Rozenhaimer7,8 Jay Herman et al.
  • 1University of Maryland Baltimore County JCET
  • 2Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
  • 3Institute of Arctic & Alpine Research, University of Colorado, Boulder, Colorado, USA
  • 4Dept. of Atmospheric Sciences, Yonsei University, Seoul, Korea
  • 5Department of Atmospheric Science, Pusan University, Busan, Korea
  • 6Goddard Earth Sciences Technology & Research (GESTAR) Columbia, Columbia, MD 21046, USA
  • 7Earth Science Division, NASA Ames, Mountain View, California, USA
  • 8Bay Area Environmental Research Institute, Petaluma, California, USA

Abstract. Nine Pandora Spectrometer Instruments (PSI) were installed at 8 sites in South Korea as part of the KORUS-AQ (Korea U.S.-Air Quality) field study integrating information from ground, aircraft, and satellite measurements for air-quality studies. The PSI made direct-sun measurements of total vertical column NO2, C(NO2), with high precision (0.05DU, where 1DU=2.69×1016molecules/cm2) and accuracy (0.1DU) that were retrieved using spectral fitting techniques. Retrieval of Formaldehyde (HCHO) total column amounts were also obtained at five sites using the recently improved PSI. The retrievals have with high precision, but possibly lower accuracy than for NO2 because of uncertainty about the optimum spectral window for all ground-based and satellite instruments. PSI direct-sun retrieved values of C(NO2) and C(HCHO) are always significantly larger than OMI retrieved C(NO2) and C(HCHO) for the OMI overpass times (13.5±0.5hours). In urban areas, PSI C(NO2) averages are at least a factor of two larger than OMI averages. Similar differences are seen for C(HCHO) in Seoul and nearby surrounding areas. Late afternoon values of C(HCHO) measured by PSI are even larger, implying that OMI early afternoon measurements underestimate the effect of poor air quality on human health. The primary cause of the OMI underestimate is the large OMI field of view FOV that includes regions containing low values of pollutants. In relatively clean areas, PSI and OMI are more closely in agreement. C(HCHO) amounts were obtained for five sites, Yonsei University in Seoul, Olympic Park, Taehwa Mtn., Amnyeondo, and Yeoju. Of these the largest amounts of C(HCHO) were observed at Olympic Park and Taehwa Mountain, surrounded by significant amounts of vegetation. Comparisons of PSI C(HCHO) results were made with the Compact Atmospheric Multispecies Spectrometer CAMS during overflights on the DC-8 aircraft for Taehwa Mtn and Olympic Park. In all cases, PSI measured substantially more C(HCHO) than obtained from integrating the CAMS altitude profiles. PSI C(HCHO) at Yonsei University in Seoul frequently reached 0.6DU and occasionally exceeded 1.5DU. The semi-rural site, Mt. Taehwa, frequently reached 0.9DU and occasionally exceeded 1.5DU. Even at the cleanest site, Amnyeondo, HCHO occasionally exceeded 1DU.

Download & links
Jay Herman et al.
Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Jay Herman et al.
Jay Herman et al.
Viewed
Total article views: 444 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
336 103 5 444 7 5
  • HTML: 336
  • PDF: 103
  • XML: 5
  • Total: 444
  • BibTeX: 7
  • EndNote: 5
Views and downloads (calculated since 03 Apr 2018)
Cumulative views and downloads (calculated since 03 Apr 2018)
Viewed (geographical distribution)
Total article views: 444 (including HTML, PDF, and XML) Thereof 440 with geography defined and 4 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited
Saved
No saved metrics found.
Discussed
No discussed metrics found.
Latest update: 17 Jul 2018
Publications Copernicus
Download
Short summary
Nine Pandora Spectrometer Instruments were installed at 8 sites for KORUS-AQ (Korea U.S.-Air Quality) field study from ground, aircraft, and satellite measurements. The quantities retrieved were total column measurements of ozone, nitrogen dioxide, and formaldehyde. We show the distribution of air pollutants vs location and time of day and comparisons with aircraft and satellite data. For some of the sites, long-term time series are available to asses changes.
Nine Pandora Spectrometer Instruments were installed at 8 sites for KORUS-AQ (Korea U.S.-Air...
Citation
Share