The MOPITT Version 6 product: algorithm enhancements and validation
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Published:2014-11-05
Issue:11
Volume:7
Page:3623-3632
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ISSN:1867-8548
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Container-title:Atmospheric Measurement Techniques
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language:en
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Short-container-title:Atmos. Meas. Tech.
Author:
Deeter M. N., Martínez-Alonso S.ORCID, Edwards D. P., Emmons L. K.ORCID, Gille J. C., Worden H. M.ORCID, Sweeney C.ORCID, Pittman J. V., Daube B. C., Wofsy S. C.
Abstract
Abstract. The Measurements of Pollution in the Troposphere (MOPITT) Version 6 (V6) product for carbon monoxide (CO) incorporates several enhancements which will benefit many users of MOPITT data. V6 algorithm improvements are described in detail, and V6 validation results are presented. First, a geolocation bias related to the orientation of the MOPITT instrument relative to the TERRA platform was characterized and eliminated. Second, the variable a priori for CO concentrations for V6 is based on simulations performed with the chemical transport model Community Atmosphere Model with Chemistry (CAM-chem) for the years 2000–2009 instead of the model-derived climatology for 1997–2004 used for V5. Third, meteorological fields required for V6 retrieval processing are extracted from the MERRA (Modern-Era Retrospective Analysis For Research And Applications) reanalysis. Finally, a significant latitude-dependent retrieval bias in the upper troposphere in Version 5 products has been substantially reduced.
Funder
National Aeronautics and Space Administration
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference19 articles.
1. Deeter, M. N.: MOPITT Geolocation Bias Analysis and Corrections, National Center for Atmospheric Research, Boulder, Colorado, United States, available at: http://web3.acd.ucar.edu/mopitt/GeolocationBiasReport.pdf (last access: 7 June 2012), 2012. 2. Deeter, M. N., Emmons, L. K., Francis, G. L., Edwards, D. P., Gille, J. C., Warner, J. X., Khattatov, B., Ziskin, D., Lamarque, J.-F., Ho, S.-P., Yudin, V., Attie, J.-L., Packman, D., Chen, J., Mao, D., Drummond, J. R., Novelli, P., and Sachse, G.: Evaluation of operational radiances for the Measurements of Pollution in the Troposphere (MOPITT) instrument CO thermal band channels, J. Geophys. Res., 109, D03308, https://doi.org/10.1029/2003JD003970, 2004. 3. Deeter, M. N., Edwards, D. P., and Gille, J. C.: Retrievals of carbon monoxide profiles from MOPITT observations using lognormal a priori statistics, J. Geophys. Res., 112, D11311, https://doi.org/10.1029/2006JD007999, 2007. 4. Deeter, M. N., Edwards, D. P., Gille, J. C., and Drummond, J. C.: CO retrievals based on MOPITT near-infrared observations, J. Geophys. Res., 114, D04303, https://doi.org/10.1029/2008JD010872, 2009. 5. Deeter,M. N., Edwards, D. P., Gille, J. C., Emmons, L. K., Francis, G., Ho, S.-P., Mao, D., Masters, D., Worden, H., Drummond, J. R., and Novelli, P. C.: The MOPITT version 4 CO product: Algorithm enhancements, validation, and long-term stability, J. Geophys. Res., 115, D07306, https://doi.org/10.1029/2009JD013005, 2010.
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