Absorption coefficient (ABSCO) tables for the Orbiting Carbon Observatories: Version 5.1

Payne, Vivienne H.; Drouin, Brian J.; Oyafuso, Fabiano; Kuai, Le; Fisher, Brendan M.; Sung, Keeyoon; Nemchick, Deacon; Crawford, Timothy J.; Smyth, Mike; Crisp, David; Adkins, Erin; Hodges, Joseph T.; Long, David A.; Mlawer, Eli J.; Merrelli, Aronne; Lunny, Elizabeth; O’Dell, Christopher W.

doi:10.1016/j.jqsrt.2020.107217

Title: Absorption coefficient (ABSCO) tables for the Orbiting Carbon Observatories: Version 5.1

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Abstract

The accuracy of atmospheric trace gas retrievals depends directly on the accuracy of the molecular absorption model used within the retrieval algorithm. For remote sensing of well-mixed gases, such as carbon dioxide (CO₂), where the atmospheric variability is small compared to the background, the quality of the molecular absorption model is key. Recent updates to oxygen (O₂) absorption coefficients (ABSCO) for the 0.76 μm A-band and the water vapor (H₂O) continuum model within the 1.6 μm and 2.06 μm CO₂ bands used within the Orbiting Carbon Observatory (OCO-2 and OCO-3) algorithm are described here. Updates in the O₂ A-band involve the inclusion of new laboratory measurements within multispectrum fits to improve relative consistency between O₂ line shapes and collision-induced absorption (CIA). The H₂O continuum model has been updated to MT_CKD v3.2, which has benefited from information from a range of laboratory studies relative to the model utilized in the previous ABSCO version. Impacts of these spectroscopy updates have been evaluated against ground-based atmospheric spectra from the Total Carbon Column Observing Network (TCCON) and within the framework of the OCO-2 algorithm, using OCO-2 soundings covering a range of atmospheric and surface conditions. The updated absorption coefficients (ABSCO version 5.1) are foundmore »« less

Authors:: Payne, Vivienne H.; Drouin, Brian J.; Oyafuso, Fabiano; Kuai, Le; Fisher, Brendan M.; Sung, Keeyoon; Nemchick, Deacon; Crawford, Timothy J.; Smyth, Mike; Crisp, David; Adkins, Erin; Hodges, Joseph T.; Long, David A.; Mlawer, Eli J.; Merrelli, Aronne; Lunny, Elizabeth; O’Dell, Christopher W.

Publication Date:: Sun Nov 01 00:00:00 EDT 2020

Research Org.:: Atmospheric and Environmental Research, Inc., Lexington, MA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER); National Institute of Standards and Technology (NIST); National Aeronautics and Space Administration (NASA)

OSTI Identifier:: 1646512

Alternate Identifier(s):: OSTI ID: 1849995

Grant/Contract Number:: DEFG02-90ER610; FG02-90ER61064; FG02-90ER610

Resource Type:: Published Article

Journal Name:: Journal of Quantitative Spectroscopy and Radiative Transfer

Additional Journal Information:: Journal Name: Journal of Quantitative Spectroscopy and Radiative Transfer Journal Volume: 255 Journal Issue: C; Journal ID: ISSN 0022-4073

Publisher:: Elsevier

Country of Publication:: United Kingdom

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 79 ASTRONOMY AND ASTROPHYSICS; oxygen; carbon dioxide; absorption; atmosphere; CIA; line-mixing

Citation Formats


                    Payne, Vivienne H., Drouin, Brian J., Oyafuso, Fabiano, Kuai, Le, Fisher, Brendan M., Sung, Keeyoon, Nemchick, Deacon, Crawford, Timothy J., Smyth, Mike, Crisp, David, Adkins, Erin, Hodges, Joseph T., Long, David A., Mlawer, Eli J., Merrelli, Aronne, Lunny, Elizabeth, and O’Dell, Christopher W. Absorption coefficient (ABSCO) tables for the Orbiting Carbon Observatories: Version 5.1.  United Kingdom: N. p., 2020. 
Web.  doi:10.1016/j.jqsrt.2020.107217.

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                    Payne, Vivienne H., Drouin, Brian J., Oyafuso, Fabiano, Kuai, Le, Fisher, Brendan M., Sung, Keeyoon, Nemchick, Deacon, Crawford, Timothy J., Smyth, Mike, Crisp, David, Adkins, Erin, Hodges, Joseph T., Long, David A., Mlawer, Eli J., Merrelli, Aronne, Lunny, Elizabeth, & O’Dell, Christopher W. Absorption coefficient (ABSCO) tables for the Orbiting Carbon Observatories: Version 5.1.  United Kingdom.  https://doi.org/10.1016/j.jqsrt.2020.107217

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                    Payne, Vivienne H., Drouin, Brian J., Oyafuso, Fabiano, Kuai, Le, Fisher, Brendan M., Sung, Keeyoon, Nemchick, Deacon, Crawford, Timothy J., Smyth, Mike, Crisp, David, Adkins, Erin, Hodges, Joseph T., Long, David A., Mlawer, Eli J., Merrelli, Aronne, Lunny, Elizabeth, and O’Dell, Christopher W. Sun .  
"Absorption coefficient (ABSCO) tables for the Orbiting Carbon Observatories: Version 5.1".  United Kingdom.  https://doi.org/10.1016/j.jqsrt.2020.107217.

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@article{osti_1646512,

  title        = {Absorption coefficient (ABSCO) tables for the Orbiting Carbon Observatories: Version 5.1},

  author       = {Payne, Vivienne H. and Drouin, Brian J. and Oyafuso, Fabiano and Kuai, Le and Fisher, Brendan M. and Sung, Keeyoon and Nemchick, Deacon and Crawford, Timothy J. and Smyth, Mike and Crisp, David and Adkins, Erin and Hodges, Joseph T. and Long, David A. and Mlawer, Eli J. and Merrelli, Aronne and Lunny, Elizabeth and O’Dell, Christopher W.},

  abstractNote = {The accuracy of atmospheric trace gas retrievals depends directly on the accuracy of the molecular absorption model used within the retrieval algorithm. For remote sensing of well-mixed gases, such as carbon dioxide (CO2), where the atmospheric variability is small compared to the background, the quality of the molecular absorption model is key. Recent updates to oxygen (O2) absorption coefficients (ABSCO) for the 0.76 μm A-band and the water vapor (H2O) continuum model within the 1.6 μm and 2.06 μm CO2 bands used within the Orbiting Carbon Observatory (OCO-2 and OCO-3) algorithm are described here. Updates in the O2 A-band involve the inclusion of new laboratory measurements within multispectrum fits to improve relative consistency between O2 line shapes and collision-induced absorption (CIA). The H2O continuum model has been updated to MT_CKD v3.2, which has benefited from information from a range of laboratory studies relative to the model utilized in the previous ABSCO version. Impacts of these spectroscopy updates have been evaluated against ground-based atmospheric spectra from the Total Carbon Column Observing Network (TCCON) and within the framework of the OCO-2 algorithm, using OCO-2 soundings covering a range of atmospheric and surface conditions. The updated absorption coefficients (ABSCO version 5.1) are found to offer improved fitting residuals and reduced biases in retrieved surface pressure relative to the previous version (ABSCO v5.0) used within B8 and B9 of the OCO-2 retrieval algorithm and have been adopted for the OCO B10 Level 2 algorithm.},

  doi          = {10.1016/j.jqsrt.2020.107217},

  journal      = {Journal of Quantitative Spectroscopy and Radiative Transfer},

  number       = C,

  volume       = 255,

  place        = {United Kingdom},

  year         = {Sun Nov 01 00:00:00 EDT 2020},

  month        = {Sun Nov 01 00:00:00 EDT 2020}

}

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