A new TROPOMI product for tropospheric NO<sub>2</sub> columns over East Asia with explicit aerosol corrections

M. Liu; M. Liu; J. Lin; H. Kong; K. F. Boersma; K. F. Boersma; H. Eskes; Y. Kanaya; Q. He; X. Tian; X. Tian; K. Qin; P. Xie; P. Xie; P. Xie; R. Spurr; R. Ni; Y. Yan; H. Weng; J. Wang

doi:10.5194/amt-13-4247-2020

Atmospheric Measurement Techniques (Aug 2020)

A new TROPOMI product for tropospheric NO<sub>2</sub> columns over East Asia with explicit aerosol corrections

M. Liu,
M. Liu,
J. Lin,
H. Kong,
K. F. Boersma,
K. F. Boersma,
H. Eskes,
Y. Kanaya,
Q. He,
X. Tian,
X. Tian,
K. Qin,
P. Xie,
P. Xie,
P. Xie,
R. Spurr,
R. Ni,
Y. Yan,
H. Weng,
J. Wang

Affiliations

M. Liu: Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China
M. Liu: now at: R&D Satellite Observations Department, Royal Netherlands Meteorological Institute, De Bilt, the Netherlands
J. Lin: Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China
H. Kong: Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China
K. F. Boersma: R&D Satellite Observations Department, Royal Netherlands Meteorological Institute, De Bilt, the Netherlands
K. F. Boersma: Meteorology and Air Quality department, Wageningen University, Wageningen, the Netherlands
H. Eskes: R&D Satellite Observations Department, Royal Netherlands Meteorological Institute, De Bilt, the Netherlands
Y. Kanaya: Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama 2360001, Japan
Q. He: School of Environment and Geoinformatics, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China
X. Tian: Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
X. Tian: Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Hefei, 230031, China
K. Qin: School of Environment and Geoinformatics, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China
P. Xie: Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
P. Xie: Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Hefei, 230031, China
P. Xie: CAS Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
R. Spurr: RT Solutions Inc., Cambridge, Massachusetts 02138, USA
R. Ni: Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China
Y. Yan: Department of Atmospheric Sciences, School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan, China
H. Weng: Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China
J. Wang: Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China

DOI: https://doi.org/10.5194/amt-13-4247-2020
Journal volume & issue: Vol. 13
pp. 4247 – 4259

Abstract

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We present a new product with explicit aerosol corrections, POMINO-TROPOMI, for tropospheric nitrogen dioxide (NO2) vertical column densities (VCDs) over East Asia, based on the newly launched TROPOspheric Monitoring Instrument with an unprecedented high horizontal resolution. Compared to the official TM5-MP-DOMINO (OFFLINE) product, POMINO-TROPOMI shows stronger concentration gradients near emission source locations and better agrees with MAX-DOAS measurements (R2=0.75; NMB=0.8 % versus R2=0.68, NMB=-41.9 %). Sensitivity tests suggest that implicit aerosol corrections, as in TM5-MP-DOMINO, lead to underestimations of NO2 columns by about 25 % over the polluted northern East China region. Reducing the horizontal resolution of a priori NO2 profiles would underestimate the retrieved NO2 columns over isolated city clusters in western China by 35 % but with overestimates of more than 50 % over many offshore coastal areas. The effect of a priori NO2 profiles is more important under calm conditions.

Published in Atmospheric Measurement Techniques

ISSN: 1867-1381 (Print); 1867-8548 (Online)
Publisher: Copernicus Publications
Country of publisher: Germany
LCC subjects: Technology: Engineering (General). Civil engineering (General): Environmental engineering; Technology: Engineering (General). Civil engineering (General): Earthwork. Foundations
Website: http://www.atmospheric-measurement-techniques.net/home.html

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