FN Archimer Export Format
PT J
TI Different types of sediment gravity flows detected in the Var submarine canyon (northwestern Mediterranean Sea)
BT 
AF KHRIPOUNOFF, Alexis
   CRASSOUS, Philippe
   LO BUE, N.
   DENNIELOU, Bernard
   SILVA JACINTO, Ricardo
AS 1:1;2:1;3:2;4:3;5:3;
FF 1:PDG-REM-EEP-LEP;2:PDG-REM-EEP-LEP;3:;4:PDG-REM-GM-LES;5:PDG-REM-GM-LES;
C1 IFREMER Brest, Dep REM EEP LEP, F-29280 Plouzane, France.
   INGV, I-00143 Rome, Italy.
   IFREMER Brest, Dep REM GM, F-29280 Plouzane, France.
C2 IFREMER, FRANCE
   INGV, ITALY
   IFREMER, FRANCE
SI BREST
SE PDG-REM-EEP-LEP
   PDG-REM-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 3.71
TC 32
UR https://archimer.ifremer.fr/doc/00113/22394/20343.pdf
LA English
DT Article
CR ENVAR5
   ENVAR6
   MEDECO
   SOLVEIG I
BO Unknown
   Téthys II
   L'Europe
AB Current velocities and vertical sediment fluxes in the Var submarine canyon were assessed at three stations respectively at 800 m, 1200 m and 1800 m depth, using moorings deployed for 4 months during winter 2008-2009. During this period, we observed three major sediment gravity flows, all characterized by sudden increases in current velocity that lasted 2-5 h and by downward particle fluxes. Each gravity flow, described using a high frequency current meter and two Acoustic Doppler Current Profiler (75 and 300 kHz ADCP) showed distinctive features. The first event, triggered during a flood of the Var River, was determined to be a hyperpycnal current with a large vertical extent (>100 m high) and relatively low velocity (40 cm s(-1)). The second event, observed after a Var River flood, was more energetic with a maximum horizontal current peak of 60 cm s(-1) with a low vertical extent (30 m high). This event was considered to be a turbidity landslide. The third was the result of a local canyon wall failure. It was characterized by a speed of >85 cm s(-1). These peaks of current speed were associated with large clouds of material that transported sediment along the canyon and reached up to 200 g m(-2) d(-1) of sediment (>1 g m(-2) d(-1) of organic carbon). Our measurements in the Var canyon show the important role of gravity flows transporting particulate matter to the deep-sea floor. These large inputs of sediment and organic carbon may have a significant impact on deep-sea carbon storage in the Mediterranean Sea. (C) 2012 Elsevier Ltd. All rights reserved.
PY 2012
PD NOV
SO Progress In Oceanography
SN 0079-6611
PU Pergamon-elsevier Science Ltd
VL 106
UT 000311663900009
BP 138
EP 153
DI 10.1016/j.pocean.2012.09.001
ID 22394
ER

EF