Retrieval of NO2 Column Amounts from Ground-Based Hyperspectral Imaging Sensor Measurements

Total column amounts of NO2 (TCN) were estimated from ground-based hyperspectral imaging sensor (HIS) measurements in a polluted urban area (Seoul, Korea) by applying the radiance ratio fitting method with five wavelength pairs from 400 to 460 nm. We quantified the uncertainty of the retrieved TCN based on several factors. The estimated TCN uncertainty was up to 0.09 Dobson unit (DU), equivalent to 2.687 × 1020 molecules m−2) given a 1◦ error for the observation geometries, including the solar zenith angle, viewing zenith angle, and relative azimuth angle. About 0.1 DU (6.8%) was estimated for an aerosol optical depth (AOD) uncertainty of 0.01. In addition, the uncertainty due to the NO2 vertical profile was 14% to 22%. Compared with the co-located Pandora spectrophotometer measurements, the HIS captured the temporal variation of the TCN during the intensive observation period. The correlation between the TCN from the HIS and Pandora also showed good agreement, with a slight positive bias (bias: 0.6 DU, root mean square error: 0.7 DU).

[1]  Jay R. Herman,et al.  Direct Sun measurements of NO2 column abundances from Table Mountain, California: Intercomparison of low- and high-resolution spectrometers , 2010 .

[2]  David P. Haffner,et al.  Validation of Brewer and Pandora measurements using OMI total ozone , 2017 .

[3]  J. Seinfeld,et al.  Atmospheric Chemistry and Physics: From Air Pollution to Climate Change , 1997 .

[4]  Alfio V. Parisi,et al.  Measured and modelled contributions to UV exposures by the albedo of surfaces in an urban environment , 2003 .

[5]  Jhoon Kim,et al.  Retrieval Accuracy of HCHO Vertical Column Density from Ground-Based Direct-Sun Measurement and First HCHO Column Measurement Using Pandora , 2018, Remote. Sens..

[6]  S. Kravitz,et al.  Synthetic infrared spectra. , 1997, Optics letters.

[7]  J. Herman,et al.  Spatial and temporal variability of ozone and nitrogen dioxide over a major urban estuarine ecosystem , 2015, Journal of Atmospheric Chemistry.

[8]  Bernhard Mayer,et al.  Atmospheric Chemistry and Physics Technical Note: the Libradtran Software Package for Radiative Transfer Calculations – Description and Examples of Use , 2022 .

[9]  J. Burrows,et al.  A wide field-of-view imaging DOAS instrument for two-dimensional trace gas mapping from aircraft , 2015 .

[10]  Maria Tzortziou,et al.  High precision, absolute total column ozone measurements from the Pandora spectrometer system: Comparisons with data from a Brewer double monochromator and Aura OMI , 2012 .

[11]  Dominik Brunner,et al.  Eight-component retrievals from ground-based MAX-DOAS observations , 2011 .

[12]  Derek M. Cunnold,et al.  Springtime transitions of NO2, CO, and O3 over North America: Model evaluation and analysis , 2008 .

[13]  Mengistu Wolde,et al.  High‐Resolution Mapping of Nitrogen Dioxide With TROPOMI: First Results and Validation Over the Canadian Oil Sands , 2019, Geophysical research letters.

[14]  A. Bazureau,et al.  Ten years of NO2 comparisons between ground-based SAOZ and satellite instruments (GOME, SCIAMACHY, OMI) , 2006 .

[15]  James F. Gleason,et al.  Validation of OMI tropospheric NO2 column densities using direct‐Sun mode Brewer measurements at NASA Goddard Space Flight Center , 2008 .

[16]  A. Smirnov,et al.  AERONET-a federated instrument network and data archive for aerosol Characterization , 1998 .

[17]  Thomas P. Kurosu,et al.  Global inventory of nitrogen oxide emissions constrained by space‐based observations of NO2 columns , 2003 .

[18]  Maria Tzortziou,et al.  NO2 column amounts from ground‐based Pandora and MFDOAS spectrometers using the direct‐sun DOAS technique: Intercomparisons and application to OMI validation , 2009 .

[19]  Jay R. Herman,et al.  The first evaluation of formaldehyde column observations by improved Pandora spectrometers during the KORUS-AQ field study. , 2018, Atmospheric chemistry and physics.

[20]  Sang Seo Park,et al.  Inter-comparison of NO 2 column densities measured by Pandora and OMI over Seoul, Korea , 2013 .

[21]  Jay R. Herman,et al.  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 , 2018, Atmospheric Measurement Techniques.

[22]  G. Socher.  Conclusions References , 2000 .

[23]  James B. Kerr,et al.  New methodology for deriving total ozone and other atmospheric variables from Brewer spectrophotometer direct sun spectra , 2002 .

[24]  Paul S. Monks,et al.  Comparison of OMI and ground‐based in situ and MAX‐DOAS measurements of tropospheric nitrogen dioxide in an urban area , 2008 .

[25]  A. W. Brewer.  A replacement for the Dobson spectrophotometer? , 1973 .

[26]  Paul J. Crutzen,et al.  The Role of NO and NO2 in the Chemistry of the Troposphere and Stratosphere , 1979 .

[27]  Jay R. Herman,et al.  Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea , 2016 .

[28]  Yu Gu,et al.  Lightning and anthropogenic NOx sources over the United States and the western North Atlantic Ocean: Impact on OLR and radiative effects , 2009 .

[29]  Johannes Orphal,et al.  Measurements of molecular absorption spectra with the SCIAMACHY pre-flight model: instrument characterization and reference data for atmospheric remote-sensing in the 230–2380 nm region , 2003 .

[30]  Vladimir V. Rozanov,et al.  Trace gas column retrieval – an error assessment study for GOME-2 , 2004 .

[31]  Sean C. Solomon,et al.  On the role of nitrogen dioxide in the absorption of solar radiation , 1999 .

[32]  Liisa Oikarinen,et al.  Inversion algorithms for recovering minor species densities from limb scatter measurements at UV‐visible wavelengths , 2002 .

[33]  J. Veefkind,et al.  Validation of Ozone Monitoring Instrument nitrogen dioxide columns , 2008 .

[34]  Ji-Ho Park,et al.  Regional characteristics of NO2 column densities from Pandora observations during the MAPS-Seoul campaign. , 2018, Aerosol and air quality research.