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Evaluation of MOPITT Version 7 joint TIR-NIR XCO retrievals with TCCON

Hedelius, Jacob K. and He, Tai-Long and Jones, Dylan B. A. and Baier, Bianca C. and Buchholz, Rebecca R. and De Mazière, Martine and Deutscher, Nicholas M. and Dubey, Manvendra K. and Feist, Dietrich G. and Griffith, David W. T. and Hase, Frank and Iraci, Laura T. and Jeseck, Pascal and Kiel, Matthäus and Kivi, Rigel and Liu, Cheng and Morino, Isamu and Notholt, Justus and Oh, Young-Suk and Ohyama, Hirofumi and Pollard, David F. and Rettinger, Markus and Roche, Sébastien and Roehl, Coleen M. and Schneider, Matthias and Shiomi, Kei and Strong, Kimberly and Sussmann, Ralf and Sweeney, Colm and Té, Yao and Uchino, Osamu and Velazco, Voltaire A. and Wang, Wei and Warneke, Thorsten and Wennberg, Paul O. and Worden, Helen M. and Wunch, Debra (2019) Evaluation of MOPITT Version 7 joint TIR-NIR XCO retrievals with TCCON. Atmospheric Measurement Techniques (AMT), 12 (10), pp. 5547-5572. Copernicus Publications. DOI: 10.5194/amt-12-5547-2019 ISSN 1867-1381

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Official URL: http://dx.doi.org/10.5194/amt-12-5547-2019

Abstract

Observations of carbon monoxide (CO) from the Measurements Of Pollution In The Troposphere (MOPITT) instrument aboard the Terra spacecraft were expected to have an accuracy of 10 % prior to the launch in 1999. Here we evaluate MOPITT Version 7 joint (V7J) thermal-infrared and near-infrared (TIR–NIR) retrieval accuracy and precision and suggest ways to further improve the accuracy of the observations. We take five steps involving filtering or bias corrections to reduce scatter and bias in the data relative to other MOPITT soundings and ground-based measurements. (1) We apply a preliminary filtering scheme in which measurements over snow and ice are removed. (2) We find a systematic pairwise bias among the four MOPITT along-track detectors (pixels) on the order of 3-4 ppb with a small temporal trend, which we remove on a global scale using a temporally trended bias correction. (3) Using a small-region approximation (SRA), a new filtering scheme is developed and applied based on additional quality indicators such as the signal-to-noise ratio (SNR). After applying these new filters, the root-mean-squared error computed using the local median from the SRA over 16 years of global observations decreases from 3.84 to 2.55 ppb. (4) We also use the SRA to find variability in MOPITT retrieval anomalies that relates to retrieval parameters. We apply a bias correction to one parameter from this analysis. (5) After applying the previous bias corrections and filtering, we compare the MOPITT results with the GGG2014 ground-based Total Carbon Column Observing Network (TCCON) observations to obtain an overall global bias correction. These comparisons show that MOPITT V7J is biased high by about 6 %-8 %, which is similar to past studies using independent validation datasets on V6J. When using TCCON spectrometric column retrievals without the standard airmass correction or scaling to aircraft (WMO scale), the ground- and satellite-based observations overall agree to better than 0.5 %. GEOS-Chem data assimilations are used to estimate the influence of filtering and scaling to TCCON on global CO and tend to pull concentrations away from the prior fluxes and closer to the truth. We conclude with suggestions for further improving the MOPITT data products.

Item URL in elib:https://elib.dlr.de/130046/
Document Type:Article
Title:Evaluation of MOPITT Version 7 joint TIR-NIR XCO retrievals with TCCON
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hedelius, Jacob K.Department of Physics, University of Toronto, Toronto, Canadahttps://orcid.org/0000-0003-2025-7519
He, Tai-LongDepartment of Physics, University of Toronto, Toronto, Canadahttps://orcid.org/0000-0002-7734-0076
Jones, Dylan B. A.Department of Physics, University of Toronto, Toronto, CanadaUNSPECIFIED
Baier, Bianca C.Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USAUNSPECIFIED
Buchholz, Rebecca R.Atmospheric Chemistry Observations & Modeling, National Center for Atmospheric Research, Boulder, Colorado, USAhttps://orcid.org/0000-0001-8124-2455
De Mazière, MartineRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, 1180, BelgiumUNSPECIFIED
Deutscher, Nicholas M.Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life Sciences, University of Wollongong, Northfields Ave., Wollongong, NSW 2522, Australiahttps://orcid.org/0000-0002-2906-2577
Dubey, Manvendra K.Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, New Mexico, UShttps://orcid.org/0000-0002-3492-790X
Feist, Dietrich G.DLR, IPA und Univ. Münchenhttps://orcid.org/0000-0002-5890-6687
Griffith, David W. T.Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life Sciences, University of Wollongong, Northfields Ave., Wollongong, NSW 2522, Australiahttps://orcid.org/0000-0002-7986-1924
Hase, FrankInstitute of Meteorology and Climate Research (IMK-ASF), Karlsruhe Institute of Technology, Karlsruhe, GermanyUNSPECIFIED
Iraci, Laura T.NASA Ames Research Center, Mountain View, California, USAhttps://orcid.org/0000-0002-2859-5259
Jeseck, PascalLERMA-IPSL, Sorbonne Université, CNRS, Observatoire de Paris, PSL Université, 75005, Paris, FranceUNSPECIFIED
Kiel, MatthäusDivision of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USAhttps://orcid.org/0000-0002-9784-962X
Kivi, RigelFinnish Meteorological Institute, Sodankylä, Finlandhttps://orcid.org/0000-0001-8828-2759
Liu, ChengSchool of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, Chinahttps://orcid.org/0000-0002-3759-9219
Morino, IsamuNational Institute for Environmental Studies (NIES), Tsukuba, Japanhttps://orcid.org/0000-0003-2720-1569
Notholt, JustusInstitute of Environmental Physics, University of Bremen, Bremen, GermanyUNSPECIFIED
Oh, Young-SukNational Institute of Meteorological Sciences 33, Seohobuk-ro, Seogwipo-si, Jeju-do 63568, Republic of Koreahttps://orcid.org/0000-0001-8010-1597
Ohyama, HirofumiNational Institute for Environmental Studies (NIES), Tsukuba, Japanhttps://orcid.org/0000-0003-2109-9874
Pollard, David F.National Institute of Water and Atmospheric Research, Lauder, New Zealandhttps://orcid.org/0000-0001-9923-2984
Rettinger, MarkusInstitute of Meteorology and Climate Research (IMK-IFU), Karlsruhe Institute of Technology (KIT), Garmisch-Partenkirchen, GermanyUNSPECIFIED
Roche, SébastienDepartment of Physics, University of Toronto, Toronto, Canadahttps://orcid.org/0000-0003-2474-4744
Roehl, Coleen M.Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USAhttps://orcid.org/0000-0001-5383-8462
Schneider, MatthiasInstitute of Meteorology and Climate Research (IMK-ASF), Karlsruhe Institute of Technology, Karlsruhe, GermanyUNSPECIFIED
Shiomi, KeiJapan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki, JapanUNSPECIFIED
Strong, KimberlyDepartment of Physics, University of Toronto, Toronto, Canadahttps://orcid.org/0000-0001-9947-1053
Sussmann, RalfInstitute of Meteorology and Climate Research (IMK-IFU), Karlsruhe Institute of Technology (KIT), Garmisch-Partenkirchen, GermanyUNSPECIFIED
Sweeney, ColmCooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USAUNSPECIFIED
Té, YaoLERMA-IPSL, Sorbonne Université, CNRS, Observatoire de Paris, PSL Université, 75005, Paris, FranceUNSPECIFIED
Uchino, OsamuNational Institute for Environmental Studies (NIES), Tsukuba, JapanUNSPECIFIED
Velazco, Voltaire A.Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life Sciences, University of Wollongong, Northfields Ave., Wollongong, NSW 2522, Australiahttps://orcid.org/0000-0002-1376-438X
Wang, WeiKey Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, ChinaUNSPECIFIED
Warneke, ThorstenInstitute of Environmental Physics, University of Bremen, Bremen, GermanyUNSPECIFIED
Wennberg, Paul O.Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USAhttps://orcid.org/0000-0002-6126-3854
Worden, Helen M.Atmospheric Chemistry Observations & Modeling, National Center for Atmospheric Research, Boulder, Colorado, USAhttps://orcid.org/0000-0002-5949-9307
Wunch, DebraDepartment of Physics, University of Toronto, Toronto, Canadahttps://orcid.org/0000-0002-4924-0377
Date:21 October 2019
Journal or Publication Title:Atmospheric Measurement Techniques (AMT)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:12
DOI :10.5194/amt-12-5547-2019
Page Range:pp. 5547-5572
Publisher:Copernicus Publications
ISSN:1867-1381
Status:Published
Keywords:carbon monoxide, remote sensing, MOPITT, TCCON, retrievals
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben LIDAR-Forschung und -Entwicklung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Lidar
Deposited By: Feist, Dr. Dietrich
Deposited On:04 Feb 2020 00:02
Last Modified:04 Feb 2020 00:02

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