Articles | Volume 10, issue 6
https://doi.org/10.5194/amt-10-2209-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/amt-10-2209-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
13 Jun 2017
Research article |
| 13 Jun 2017
Comparisons of the Orbiting Carbon Observatory-2 (OCO-2) XCO2 measurements with TCCON
Debra Wunch
CORRESPONDING AUTHOR
California Institute of Technology, Pasadena, CA, USA
University of Toronto, Toronto, Canada
Paul O. Wennberg
California Institute of Technology, Pasadena, CA, USA
Gregory Osterman
Jet Propulsion Laboratory, Pasadena, CA, USA
California Institute of Technology, Pasadena, CA, USA
Brendan Fisher
Jet Propulsion Laboratory, Pasadena, CA, USA
California Institute of Technology, Pasadena, CA, USA
Bret Naylor
Jet Propulsion Laboratory, Pasadena, CA, USA
California Institute of Technology, Pasadena, CA, USA
Coleen M. Roehl
California Institute of Technology, Pasadena, CA, USA
Christopher O'Dell
Colorado State University, Fort Collins, CO, USA
Lukas Mandrake
Jet Propulsion Laboratory, Pasadena, CA, USA
California Institute of Technology, Pasadena, CA, USA
Camille Viatte
California Institute of Technology, Pasadena, CA, USA
Matthäus Kiel
California Institute of Technology, Pasadena, CA, USA
Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany
David W. T. Griffith
University of Wollongong, Wollongong, Australia
Nicholas M. Deutscher
University of Wollongong, Wollongong, Australia
University of Bremen, Bremen, Germany
Voltaire A. Velazco
University of Wollongong, Wollongong, Australia
Justus Notholt
University of Bremen, Bremen, Germany
Thorsten Warneke
University of Bremen, Bremen, Germany
Christof Petri
University of Bremen, Bremen, Germany
Martine De Maziere
Royal Belgian Institute for Space Aeronomy, Brussels, Belgium
Mahesh K. Sha
Royal Belgian Institute for Space Aeronomy, Brussels, Belgium
Ralf Sussmann
Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research (IMK-IFU), Garmisch-Partenkirchen, Germany
Markus Rettinger
Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research (IMK-IFU), Garmisch-Partenkirchen, Germany
David Pollard
National Institute of Water and Atmospheric Research, Lauder, New Zealand
John Robinson
National Institute of Water and Atmospheric Research, Lauder, New Zealand
Isamu Morino
National Institute for Environmental Studies (NIES), Tsukuba, Japan
Osamu Uchino
National Institute for Environmental Studies (NIES), Tsukuba, Japan
Frank Hase
Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany
Thomas Blumenstock
Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany
Dietrich G. Feist
Max Planck Institute for Biogeochemistry, Jena, Germany
Sabrina G. Arnold
Max Planck Institute for Biogeochemistry, Jena, Germany
Kimberly Strong
University of Toronto, Toronto, Canada
Joseph Mendonca
University of Toronto, Toronto, Canada
Rigel Kivi
Finnish Meteorological Institute, Sodankylä, Finland
Pauli Heikkinen
Finnish Meteorological Institute, Sodankylä, Finland
Laura Iraci
NASA Ames Research Center, Moffett Field, CA, USA
James Podolske
NASA Ames Research Center, Moffett Field, CA, USA
Patrick W. Hillyard
NASA Ames Research Center, Moffett Field, CA, USA
Bay Area Environmental Research Institute, Petaluma, CA, USA
Shuji Kawakami
Japan Aerospace Exploration Agency (JAXA), Tsukuba, Japan
Manvendra K. Dubey
Los Alamos National Laboratory, Los Alamos, NM, USA
Harrison A. Parker
Los Alamos National Laboratory, Los Alamos, NM, USA
Eliezer Sepulveda
Izaña Atmospheric Research Center, Meteorological State Agency of Spain (AEMet), Tenerife, Spain
Omaira E. García
Izaña Atmospheric Research Center, Meteorological State Agency of Spain (AEMet), Tenerife, Spain
LERMA-IPSL, Sorbonne Universités, UPMC Univ Paris 06, CNRS, Observatoire de Paris, PSL Research University, 75005 Paris, France
Pascal Jeseck
LERMA-IPSL, Sorbonne Universités, UPMC Univ Paris 06, CNRS, Observatoire de Paris, PSL Research University, 75005 Paris, France
Michael R. Gunson
Jet Propulsion Laboratory, Pasadena, CA, USA
California Institute of Technology, Pasadena, CA, USA
David Crisp
Jet Propulsion Laboratory, Pasadena, CA, USA
California Institute of Technology, Pasadena, CA, USA
Annmarie Eldering
Jet Propulsion Laboratory, Pasadena, CA, USA
California Institute of Technology, Pasadena, CA, USA
Abstract. NASA's Orbiting Carbon Observatory-2 (OCO-2) has been measuring carbon dioxide column-averaged dry-air mole fraction, XCO2, in the Earth's atmosphere for over 2 years. In this paper, we describe the comparisons between the first major release of the OCO-2 retrieval algorithm (B7r) and XCO2 from OCO-2's primary ground-based validation network: the Total Carbon Column Observing Network (TCCON). The OCO-2 XCO2 retrievals, after filtering and bias correction, agree well when aggregated around and coincident with TCCON data in nadir, glint, and target observation modes, with absolute median differences less than 0.4 ppm and RMS differences less than 1.5 ppm. After bias correction, residual biases remain. These biases appear to depend on latitude, surface properties, and scattering by aerosols. It is thus crucial to continue measurement comparisons with TCCON to monitor and evaluate the OCO-2 XCO2 data quality throughout its mission.
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How to cite. Wunch, D., Wennberg, P. O., Osterman, G., Fisher, B., Naylor, B., Roehl, C. M., O'Dell, C., Mandrake, L., Viatte, C., Kiel, M., Griffith, D. W. T., Deutscher, N. M., Velazco, V. A., Notholt, J., Warneke, T., Petri, C., De Maziere, M., Sha, M. K., Sussmann, R., Rettinger, M., Pollard, D., Robinson, J., Morino, I., Uchino, O., Hase, F., Blumenstock, T., Feist, D. G., Arnold, S. G., Strong, K., Mendonca, J., Kivi, R., Heikkinen, P., Iraci, L., Podolske, J., Hillyard, P. W., Kawakami, S., Dubey, M. K., Parker, H. A., Sepulveda, E., García, O. E., Te, Y., Jeseck, P., Gunson, M. R., Crisp, D., and Eldering, A.: Comparisons of the Orbiting Carbon Observatory-2 (OCO-2) XCO2 measurements with TCCON, Atmos. Meas. Tech., 10, 2209–2238, https://doi.org/10.5194/amt-10-2209-2017, 2017.
Short summary
This paper describes the comparisons between NASA's Orbiting Carbon Observatory (OCO-2) column-averaged dry-air mole fractions of CO2 with its primary ground-based validation network, the Total Carbon Column Observing Network (TCCON). The paper shows that while the standard bias correction reduces much of the spurious variability in the satellite measurements, residual biases remain.
This paper describes the comparisons between NASA's Orbiting Carbon Observatory (OCO-2)...