Infrared optical signature reveals the source-dependency and along-transport evolution of dust mineralogy as shown by laboratory study.

Autor: Di Biagio C; Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, F-75013, Paris, France. claudia.dibiagio@lisa.ipsl.fr., Doussin JF; Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, F-94010, Créteil, France., Cazaunau M; Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, F-94010, Créteil, France., Pangui E; Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, F-94010, Créteil, France., Cuesta J; Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, F-94010, Créteil, France., Sellitto P; Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, F-94010, Créteil, France.; Istituto Nazionale di Geofisica e Vulcanologia, Osservartorio Etneo, Catania, Italy., Ródenas M; EUPHORE Labs., Fundación CEAM, 46980, Paterna, Valencia, Spain., Formenti P; Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, F-75013, Paris, France.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Aug 15; Vol. 13 (1), pp. 13252. Date of Electronic Publication: 2023 Aug 15.
DOI: 10.1038/s41598-023-39336-7
Abstrakt: Advancing knowledge of the mineralogical composition of dust is key for understanding and predicting its climate and environmental impacts. The variability of dust mineralogy from one source to another and its evolution during atmospheric transport is not measured at large scale. In this study we use laboratory measurements to demonstrate that the extinction signature of suspended dust aerosols in the 740 - 1250 cm -1 atmospheric window can be used to derive dust mineralogy in terms of the main infrared - active minerals, namely quartz, clays, feldspars and calcite. Various spectral signatures in dust extinction enable to distinguish between multiple global sources with changing composition, whereas modifications of the dust extinction spectra with time inform on size - dependent particles mineralogy changes during transport. The present study confirms that spectral and hyperspectral infrared remote sensing observations offer great potential for elucidating the size - segregated mineralogy of airborne dust at regional and global scales.
(© 2023. Springer Nature Limited.)
Databáze: MEDLINE
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