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Shipborne measurements of XCO$_{2}$, XCH$_{4}$, and XCO above the Pacific Ocean and comparison to CAMS atmospheric analyses and S5P/TROPOMI

Knapp, Marvin; Kleinschek, Ralph; Hase, Frank; Agustí-Panareda, Anna; Inness, Antje; Barré, Jérôme; Landgraf, Jochen; Borsdorff, Tobias; Kinne, Stefan; Butz, André

Abstract:
Measurements of atmospheric column-averaged dry-air mole fractions of carbon dioxide (XCO2), methane (XCH4), and carbon monoxide (XCO) have been collected across the Pacific Ocean during the Measuring Ocean REferences 2 (MORE-2) campaign in June 2019. We deployed a shipborne variant of the EM27/SUN Fourier transform spectrometer (FTS) on board the German RN Sonne which, during MORE-2, crossed the Pacific Ocean from Vancouver, Canada, to Singapore. Equipped with a specially manufactured fast solar tracker, the FTS operated in direct-sun viewing geometry during the ship cruise reliably delivering solar absorption spectra in the shortwave infrared spectral range (4000 to 11000 cm(-1)). After filtering and bias correcting the dataset, we report on XCO2, XCH4, and XCO measurements for 22 d along a trajectory that largely aligns with 30 degrees N of latitude between 140 degrees W and 120 degrees E of longitude. The dataset has been scaled to the Total Carbon Column Observing Network (TCCON) station in Karlsruhe, Germany, before and after the MORE-2 campaign through side-by-side measurements. The la repeatability of hourly means of XCO2, XCH4, and XCO is found to be 0.24 ppm, 1.1 ppb, and 0.75 ppb, respectively. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000130545
Veröffentlicht am 15.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 29.01.2021
Sprache Englisch
Identifikator ISSN: 1866-3516
KITopen-ID: 1000130545
Erschienen in Earth system science data
Verlag Copernicus Publications
Band 13
Heft 1
Seiten 199–211
Nachgewiesen in Scopus
Web of Science
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