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Aerosol properties derived from ground-based Fourier transform spectra within the COllaborative Carbon Column Observing Network

Alvárez, Óscar; Barreto, África; García, Omaira E.; Hase, Frank 1; García, Rosa D.; Gröbner, Julian; León-Luis, Sergio F.; Sepúlveda, Eliezer; Carreño, Virgilio; Alcántara, Antonio; Ramos, Ramón; Almansa, A. Fernando; Kazadzis, Stelios; Taquet, Noémie; Toledano, Carlos; Cuevas, Emilio
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF), Karlsruher Institut für Technologie (KIT)

Abstract:

Fourier transform infrared (FTIR) spectroscopy is particularly relevant for climate studies due to its ability to provide information on both fine absorption structures (i.e. trace gases) and broadband continuum signatures (i.e. aerosols or water continuum) across the entire infrared (IR) domain. In this context, this study assesses the capability of the portable and compact EM27/SUN spectrometer, used within the research infrastructure COCCON (COllaborative Carbon Column Observing Network), to retrieve spectral aerosol properties from low-resolution FTIR solar absorption spectra (0.5 cm$^{−1}$). The study focuses on the retrieval of aerosol optical depth (AOD) and its spectral dependence in the 873–2314 nm spectral range from COCCON measurements at the subtropical high-mountain Izaña Observatory (IZO, Tenerife, Spain), which were coincidentally carried out with standard sun photometry within the Aerosol Robotic Network (AERONET) in the 3-year period from December 2019 to September 2022. The co-located AERONET–COCCON database was used to cross-validate these two independent techniques in the common spectral range (870–1640 nm), demonstrating an excellent agreement at the near-coincident spectral bands (mean AOD differences limited to 0.005, standard deviations up to 0.021 and Pearson regression coefficients up to 0.97). ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000165780
Veröffentlicht am 02.01.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
KITopen-ID: 1000165780
HGF-Programm 12.11.25 (POF IV, LK 01) Atmospheric composition and circulation changes
Erschienen in Atmospheric Measurement Techniques
Verlag Copernicus Publications
Band 16
Heft 20
Seiten 4861 – 4884
Vorab online veröffentlicht am 25.10.2023
Nachgewiesen in Dimensions
Web of Science
Scopus
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