FN Archimer Export Format
PT J
TI Modeling biogeochemical processes in sediments from the Rhone River prodelta area (NW Mediterranean Sea)
BT 
AF PASTOR, L.
   CATHALOT, C.
   DEFLANDRE, B.
   VIOLLIER, E.
   SOETAERT, K.
   MEYSMAN, F. J. R.
   ULSES, C.
   METZGER, E.
   RABOUILLE, C.
AS 1:1;2:2;3:1,3;4:1;5:4;6:4;7:5;8:;9:2;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Univ. Paris Diderot, Sorbonne Paris Cité, Institut de Physique du Globe de Paris, UMR7154 CNRS, 75013 Paris, France
   Lab. des Sciences du Climat et de l'Environ., CEA-CNRS UMR 1572, Av. de la Terrasse, 91198 Gif sur Yvette, France
   UMR5805 EPOC – OASU, Université Bordeaux 1 – CNRS, Avenue des Facultés, 33405 Talence cedex, France
   NIOO-KNAW, Centre for Estuarine and Marine Ecology, Korringaweg 7, 4401 NT Yerseke, The Netherlands
   Laboratoire d'Aérologie, CNRS et Université de Toulouse, 14 avenue Edouard Belin, 31400 Toulouse, France
   Laboratoire des Bio-Indicateurs Actuels et Fossiles, UPRES EA 2644, UFR Sciences 2 bd Lavoisier, 49045 Angers Cedex 01, France
C2 UNIV PARIS 07, FRANCE
   LSCE, FRANCE
   UNIV BORDEAUX, FRANCE
   NIOO-KNAW, NETHERLANDS
   UNIV TOULOUSE, FRANCE
   UNIV ANGERS, FRANCE
IF 3.859
TC 41
UR https://archimer.ifremer.fr/doc/00303/41423/40614.pdf
   https://archimer.ifremer.fr/doc/00303/41423/71282.pdf
LA English
DT Article
CR CHACCRA-BENT1
   CHACCRA-BENT2
   CHACCRA_PLUME
   RHOFIBENT
   RIOMAR1
   RIOTECH
BO Téthys II
   L'Europe
AB In situ oxygen microprofiles, sediment organic carbon content, and pore-water concentrations of nitrate, ammonium, iron, manganese, and sulfides obtained in sediments from the Rhone River prodelta and its adjacent continental shelf were used to constrain a numerical diagenetic model. Results showed that (1) the organic matter from the Rhone River is composed of a fraction of fresh material associated to high first-order degradation rate constants (11-33 yr(-1)); (2) the burial efficiency (burial/input ratio) in the Rh boolean AND one prodelta (within 3 km of the river outlet) can be up to 80 %, and decreases to similar to 20% on the adjacent continental shelf 10-15 km further offshore; (3) there is a large contribution of anoxic processes to total mineralization in sediments near the river mouth, certainly due to large inputs of fresh organic material combined with high sedimentation rates; (4) diagenetic by-products originally produced during anoxic organic matter mineralization are almost entirely precipitated (> 97 %) and buried in the sediment, which leads to (5) a low contribution of the re-oxidation of reduced products to total oxygen consumption. Consequently, total carbon mineralization rates as based on oxygen consumption rates and using Redfield stoichiometry can be largely underestimated in such River-dominated Ocean Margins (RiOMar) environments.
PY 2011
PD MAY
SO Biogeosciences
SN 1726-4170
PU Copernicus GmbH
VL 8
IS 5
UT 000291003200022
BP 1351
EP 1366
DI 10.5194/bg-8-1351-2011
ID 41423
ER

EF