FN Archimer Export Format
PT J
TI Dual-frequency ADCPs measuring turbidity
BT 
AF JOURDIN, Frederic
   TESSIER, Caroline
   LE HIR, Pierre
   VERNEY, Romaric
   LUNVEN, Michel
   LOYER, Sophie
   LUSVEN, Andre
   FILIPOT, Jean-Francois
   LEPESQUEUR, Jeremy
AS 1:1;2:2;3:3;4:3;5:3;6:1;7:1;8:4;9:1;
FF 1:;2:;3:PDG-ODE-DYNECO-PHYSED;4:PDG-ODE-DYNECO-PHYSED;5:PDG-ODE-DYNECO-PELAGOS;6:;7:;8:;9:;
C1 SHOM, F-29228 Brest, France.
   DHI, F-44300 Nantes, France.
   IFREMER, F-29280 Plouzane, France.
   France Energies Marines, F-29200 Brest, France.
C2 SHOM, FRANCE
   DHI, FRANCE
   IFREMER, FRANCE
   FRANCE ENERGIES MARINES, FRANCE
SI AUTRE
   BREST
   FEM
SE SHOM-REC
   PDG-ODE-DYNECO-PHYSED
   PDG-ODE-DYNECO-PELAGOS
   AUTRE
   FRANCE-ENERGIES-MARINES
IN WOS Ifremer jusqu'en 2018
   copubli-france
IF 2.122
TC 15
UR https://archimer.ifremer.fr/doc/00213/32427/30896.pdf
LA English
DT Article
AB A pair of self-contained acoustic Doppler current profilers (SC-ADCPs) operating with different frequencies were moored on a muddy sea bottom at about 20 m depth in the Bay of Vilaine off the French Atlantic coast. With their acoustic beams oriented upwards, the SC-ADCPs ensonified most of the water column. The results of several months of in situ recorded echo intensity data spanning 2 years (2003 to 2004) from the dual-frequency ADCPs are presented in this paper. The aim was to estimate suspended particle mass concentration and mean size. A concentration index CI is proposed for the estimation of particle concentration. Based on theory the CI-unlike the volume backscatter strength-does not depend on particle size. Compared with in situ optical data, the CI shows reasonable precision but not increased with respect to that of the highest-frequency backscatter strength. Concerning the mean particle size, despite a lack of quantitative validation with optical particle-size measurements, the method yielded a qualitative discrimination of mineral (small) and organic (large) particles. This supports the potential of dual-frequency ADCPs to quantitatively determine particle size. A cross-calibration of the transducers of each ADCP shows that a specific component of the precision of the backscatter strength measured by ADCP depends on the acoustic frequency, the cell thickness and the ensemble integration time. Based on these results, the use of two ADCPs operating with distinctly different frequencies (two octaves apart) or a single dual-frequency ADCP is recommended.
PY 2014
PD AUG
SO Geo-marine Letters
SN 0276-0460
PU Springer
VL 34
IS 4
UT 000341828100007
BP 381
EP 397
DI 10.1007/s00367-014-0366-2
ID 32427
ER

EF