FN Archimer Export Format
PT J
TI The fate of river organic carbon in coastal areas: A study in the Rhone River delta using multiple isotopic (delta C-13, Delta C-14) and organic tracers
BT 
AF CATHALOT, Cecile
   RABOUILLE, Christophe
   TISNERAT-LABORDE, N.
   TOUSSAINT, Flora
   KERHERVE, P.
   BUSCAIL, R.
   LOFTIS, K.
   SUN, M. -Y.
   TRONCZYNSKI, Jacek
   AZOURY, S.
   LANSARD, Bruno
   TREIGNIER, CLAIRE
   PASTOR, L.
   TESI, T.
AS 1:1;2:1;3:1;4:1;5:2,3;6:2,3;7:4;8:4;9:5;10:;11:1;12:1;13:6;14:7,8;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:PDG-RBE-BE-LBCO;10:;11:;12:;13:;14:;
C1 UVSQ, CNRS, CEA, Lab Sci Climat & Environm, Gif Sur Yvette, France.
   CNRS, Ctr Format & Rech Environm Mediterraneens, UMR 5110, F-66860 Perpignan, France.
   Univ Perpignan, Ctr Format & Rech Environm Mediterraneens, UMR 5110, F-66860 Perpignan, France.
   Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA.
   IFREMER, Lab Biogeochim Contaminants Organ, Nantes, France.
   Univ Paris 07, Lab Geochim Eaux, Paris, France.
   ISMAR CNR UOS Bologna, Ist Sci Marine, I-40129 Bologna, Italy.
   Stockholm Univ, Inst Appl Environm Res ITM, S-10691 Stockholm, Sweden.
C2 UNIV VERSAILLES, FRANCE
   CNRS, FRANCE
   UNIV PERPIGNAN, FRANCE
   UNIV GEORGIA, USA
   IFREMER, FRANCE
   UNIV PARIS 07, FRANCE
   ISMAR, ITALY
   UNIV STOCKHOLM, SWEDEN
SI NANTES
SE PDG-RBE-BE-LBCO
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 4.25
TC 58
TU Centre national de la recherche scientifique
   Université de Perpignan - Via Domitia
UR https://archimer.ifremer.fr/doc/00157/26784/25673.pdf
LA English
DT Article
CR CHACCRA-BENT1
   CHACCRA-BENT2
   CHACCRA_PLUME
   MINERCOT 2
   RHOFIBENT
   RHOSOS
   RIOMAR1
   RIOTECH
BO Téthys II
   L'Europe
   Le Suroît
AB A significant fraction of the global carbon flux to the ocean occurs in River-dominated Ocean Margins (RiOMar) although large uncertainties remain in the cycle of organic matter (OM) in these systems. In particular, the OM sources and residence time have not been well clarified. Surface (0-1 cm) and sub-surface (3-4 cm) sediments and water column particles (bottom and intermediate depth) from the Rhone River delta system were collected in June 2005 and in April 2007 for a multi-proxy study. Lignin phenols, black carbon (BC), proto-kerogen/BC mixture, polycyclic aromatic hydrocarbons (PAHs), carbon stable isotope (delta C-13(OC)), and radiocarbon measurements (delta C-14(OC)) were carried out to characterize the source of sedimentary organic material and to address degradation and transport processes. The bulk OM in the prodelta sediment appears to have a predominantly modern terrigenous origin with a significant contribution of modern vascular C-3 plant detritus (Delta C-14(OC) = 27.9 parts per thousand, delta C-13(OC) = -27.4 parts per thousand). In contrast, the adjacent continental shelf, below the river plume, seems to be dominated by aged OM (Delta C-14(OC) = -400 parts per thousand, delta C-13(OC) = -24.2 parts per thousand), and shows no evidence of dilution and/or replacement by freshly produced marine carbon. Our data suggest an important contribution of black carbon (50% of OC) in the continental shelf sediments. Selective degradation processes occur along the main dispersal sediment system, promoting the loss of a modern terrestrial OM but also proto-kerogen-like OM. In addition, we hypothesize that during the transport across the shelf, a long term resuspension/deposition loop induces efficient long term degradation processes able to rework such refractory-like material until the OC is protected by the mineral matrix of particles.
PY 2013
PD OCT
SO Geochimica Et Cosmochimica Acta
SN 0016-7037
PU Pergamon-elsevier Science Ltd
VL 118
UT 000324035800003
BP 33
EP 55
DI 10.1016/j.gca.2013.05.001
ID 26784
ER

EF