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Articles | Volume 23, issue 15
Articles | Volume 23, issue 15
https://doi.org/10.5194/bg-23-5377-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-23-5377-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 15
Research article
 | 
04 Aug 2026
Research article |  | 04 Aug 2026

Selective accumulation of dissolved organic matter in the sea surface microlayer: integrated multi-spectral CDOM and FDOM characterization and a novel FDOM/CDOM index at a Mediterranean coastal site

Elli Pitta, Eleni Tzempelikou, and Christina Zeri

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Short summary
Chromophoric dissolved organic matter dynamics (CDOM) in the sea surface microlayer (SML) and underlying water were examined at a coastal site. The SML was enriched in dissolved organic carbon (DOC), CDOM and fluorescent dissolved organic matter (FDOM). Optical indices and FDOM/CDOM index showed wavelength-dependent enrichment and decoupling of CDOM-FDOM, suggesting that photodegradation, biological processes and atmospheric inputs shape DOC pool beyond simple upward flux from underlying waters.
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