KIT | KIT-Bibliothek | Impressum | Datenschutz

Accurate mobile remote sensing of XCO₂ and XCH₄ latitudinal transects from aboard a research vessel

Klappenbach, F.; Bertleff, M.; Kostinek, J.; Hase, F.; Blumenstock, T.; Agusti-Panareda, A.; Razinger, M.; Butz, A.

A portable Fourier transform spectrometer (FTS), model EM27/SUN, was deployed onboard the research vessel Polarstern to measure the column-average dry air mole fractions of carbon dioxide (XCO$_{2}$) and methane (XCH$_{4}$) by means of direct sunlight absorption spectrometry. We report on technical developments as well as data calibration and reduction measures required to achieve the targeted accuracy of fractions of a percent in retrieved XCO$_{2}$ and XCH$_{4}$ while operating the instrument under field conditions onboard the moving platform during a 6-week cruise on the Atlantic from Cape Town (South Africa, 34° S, 18° E; 5 March 2014) to Bremerhaven (Germany, 54° N, 19° E; 14 April 2014). We demonstrate that our solar tracker typically achieved a tracking precision of better than 0.05° toward the center of the sun throughout the ship cruise which facilitates accurate XCO$_{2}$ and XCH$_{4}$ retrievals even under harsh ambient wind conditions. We define several quality filters that screen spectra, e.g., when the field of view was partially obstructed by ship structures or when the lines-of-sight crossed the ship exhaust plume. The measurements in clean oceanic air, can be used to characterize a spurious air-mass dependency. ... mehr

Open Access Logo

Volltext §
DOI: 10.5445/IR/1000052442
DOI: 10.5194/amt-8-5023-2015
Zitationen: 22
Web of Science
Zitationen: 20
Zitationen: 19
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2015
Sprache Englisch
Identifikator ISSN: 1867-1381
KITopen-ID: 1000052442
HGF-Programm 12.03.01 (POF III, LK 01) Long term observations of tropospheric
Erschienen in Atmospheric Measurement Techniques
Verlag Copernicus Publications
Band 8
Heft 12
Seiten 5023-5038
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page