title: Biophysical processes affecting DOM dynamics at the Arno river mouth (Tyrrhenian Sea).
abstract: Dissolved organic carbon (DOC) and optical properties (absorption and fluorescence) of chromophoric dissolved organic matter (CDOM) were measured in October 2012, at the Arno river mouth and in a coastal station close to it. The data reported indicates that the Arno river represents an important source of DOC and CDOM to this coastal area, with a total DOC flux of 11.23-12.04 · 10(9)g C · y(-1). Moving from the river to the sea, CDOM absorption and fluorescence decreased, while the spectral slope increased, suggesting a change in the molecular properties of CDOM. Mineralization experiments were carried out in order to investigate the main processes of DOM removal and/or transformation in riverine and coastal water. DOC removal rates were 20 μM · month(-1) in the river and 3 μM · month(-1) in the seawater, while CDOM was released during the first 30 days and removed in the following 40 days.
authors.affiliation: Istituto di Biofisica, CNR, Pisa, Italy. Electronic address: simona.retelletti@pi.ibf.cnr.it.
authors.forename: S
authors.initials: S
authors.lastname: Retelletti Brogi
authors.affiliation: Istituto di Biofisica, CNR, Pisa, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Gonnelli
authors.affiliation: Istituto di Biofisica, CNR, Pisa, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Vestri
authors.affiliation: Istituto di Biofisica, CNR, Pisa, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Santinelli
mesh_terms: D002244:Carbon / Q000032:analysis*; D005453:Fluorescence; D009930:Organic Chemicals / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D009930:Organic Chemicals; D002244:Carbon
keywords: Absorption spectroscopy; CDOM; DOC; Fluorescence EEM; Mineralization rate; River