Title

Validation of methane and carbon monoxide from Sentinel-5 Precursor using TCCON and NDACC-IRWG stations

Authors

Mahesh Kumar Sha, Royal Belgian Institute for Space Aeronomy
Bavo Langerock, Royal Belgian Institute for Space Aeronomy
Jean François L. Blavier, Jet Propulsion Laboratory
Thomas Blumenstock, Karlsruher Institut für Technologie
Tobias Borsdorff, SRON Netherlands Institute for Space Research
Matthias Buschmann, Universität Bremen
Angelika Dehn, ESRIN - ESA Centre for Earth Observation
Martine De Mazière, Royal Belgian Institute for Space Aeronomy
Nicholas M. Deutscher, Faculty of Science, Medicine and Health
Dietrich G. Feist, Ludwig-Maximilians-Universität München
Omaira E. Garciá, Meteorological State Agency of Spain (AEMET)
David W.T. Griffith, Faculty of Science, Medicine and Health
Michel Grutter, Universidad Nacional Autónoma de México
James W. Hannigan, National Center for Atmospheric Research
Frank Hase, Karlsruher Institut für Technologie
Pauli Heikkinen, Finnish Meteorological Institute
Christian Hermans, Royal Belgian Institute for Space Aeronomy
Laura T. Iraci, NASA Ames Research Center
Pascal Jeseck, Sorbonne Universite
Nicholas Jones, Faculty of Science, Medicine and Health
Rigel Kivi, Finnish Meteorological Institute
Nicolas Kumps, Royal Belgian Institute for Space Aeronomy
Jochen Landgraf, SRON Netherlands Institute for Space Research
Alba Lorente, SRON Netherlands Institute for Space Research
Emmanuel Mahieu, Université de Liège
Maria V. Makarova, Saint Petersburg State University
Johan Mellqvist, Chalmers University of Technology
Jean Marc Metzger, Université de La Réunion
Isamu Morino, National Institute for Environmental Studies of Japan
Tomoo Nagahama, Nagoya University

Publication Name

Atmospheric Measurement Techniques

Abstract

The Sentinel-5 Precursor (S5P) mission with the TROPOspheric Monitoring Instrument (TROPOMI) on board has been measuring solar radiation backscattered by the Earth's atmosphere and surface since its launch on 13 October 2017. In this paper, we present for the first time the S5P operational methane (CH4) and carbon monoxide (CO) products' validation results covering a period of about 3 years using global Total Carbon Column Observing Network (TCCON) and Infrared Working Group of the Network for the Detection of Atmospheric Composition Change (NDACCIRWG) network data, accounting for a priori alignment and smoothing uncertainties in the validation, and testing the sensitivity of validation results towards the application of advanced co-location criteria. We found that the S5P standard and bias-corrected CH4 data over land surface for the recommended quality filtering fulfil the mission requirements. The systematic difference of the bias-corrected total columnaveraged dry air mole fraction of methane (XCH4) data with respect to TCCON data is-0.26±0.56% in comparison to-0.68±0.74% for the standard XCH4 data, with a correlation of 0.6 for most stations. The bias shows a seasonal dependence. We found that the S5P CO data over all surfaces for the recommended quality filtering generally fulfil the missions requirements, with a few exceptions, which are mostly due to co-location mismatches and limited availability of data. The systematic difference between the S5P total column-averaged dry air mole fraction of carbon monoxide (XCO) and the TCCON data is on average 9.22±3.45% (standard TCCON XCO) and 2.45±3.38% (unscaled TCCON XCO). We found that the systematic difference between the S5P CO column and NDACC CO column (excluding two outlier stations) is on average 6.5±3.54 %.We found a correlation of above 0.9 for most TCCON and NDACC stations. The study shows the high quality of S5P CH4 and CO data by validating the products against reference global TCCON and NDACC stations covering a wide range of latitudinal bands, atmospheric conditions and surface conditions.

Open Access Status

This publication may be available as open access

Volume

14

Issue

9

First Page

6249

Last Page

6304

Funding Number

4000117151/16/I-LG

Funding Sponsor

National Science Foundation

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Link to publisher version (DOI)

http://dx.doi.org/10.5194/amt-14-6249-2021