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Retrievals of XCO2, XCH4 and XCO from portable, near-infrared Fourier transform spectrometer solar observations in Antarctica

Pollard, David F. F. ; Hase, Frank 1; Sha, Mahesh Kumar; Dubravica, Darko 1; Alberti, Carlos ORCID iD icon 1; Smale, Dan
1 Institut für Meteorologie und Klimaforschung Atmosphärische Spurengase und Fernerkundung (IMKASF), Karlsruher Institut für Technologie (KIT)

Abstract:

The COllaborative Carbon Column Observing Network (COCCON) uses low-resolution, portable EM27/SUN Fourier transform spectrometers (FTSs) to make retrievals of column-averaged dry-air mole fractions (DMFs, represented as Xgas) of CO2, CH4, CO and H2O from near-infrared solar absorption spectra. The COCCON has developed rapidly over recent years and complements the Total Carbon Column Observing Network (TCCON).

In this work, we provide details of the first seasonal time series of near-infrared XCO2, XCH4 and XCO retrievals from measurements made in Antarctica during the deployment of an EM27/SUN to the Arrival Heights laboratory on Ross Island over the austral summer of 2019–2020 under the auspices of the COCCON.

The DMFs of all three species were lower in Antarctica than at mid-latitude, and for XCO2 and XCO, the retrieved values were less variable. For XCH4 however, the variability was significantly greater and it was found that this was strongly correlated to the proximity of the polar vortex.

In order to ensure the stability of the instrument and the traceability of the retrievals, side-by-side comparisons to the TCCON station at Lauder, New Zealand and retrievals of the instrument line shape (ILS) were made before and after the measurements in Antarctica. ... mehr

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Atmosphärische Spurengase und Fernerkundung (IMKASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1866-3516
KITopen-ID: 1000154724
HGF-Programm 12.11.13 (POF IV, LK 01) Long-term trends of global atmospheric composition
Erschienen in Earth System Science Data
Verlag Copernicus Publications
Band 14
Heft 12
Seiten 5427–5437
Vorab online veröffentlicht am 15.12.2022
Nachgewiesen in Dimensions
Scopus
Web of Science
OpenAlex
Globale Ziele für nachhaltige Entwicklung Ziel 14 – Leben unter Wasser

Verlagsausgabe §
DOI: 10.5445/IR/1000154724
Veröffentlicht am 18.01.2023
Originalveröffentlichung
DOI: 10.5194/essd-14-5427-2022
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Seitenaufrufe: 83
seit 19.01.2023
Downloads: 39
seit 23.01.2023
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