FN Archimer Export Format
PT J
TI Altimetry combined with hydrography for ocean transport estimation
BT 
AF GOURCUFF, Claire
   LHERMINIER, Pascale
   MERCIER, Herle
   LE TRAON, Pierre-Yves
AS 1:1,3;2:1;3:1,3;4:2;
FF 1:;2:PDG-ODE-LPO;3:;4:PDG-ODE-ADM3;
C1 IFREMER, CNRS UBO IFREMER IRD, Lab Phys Oceans, Brest, France.
   IFREMER, Lab Oceanog Spatiale, Brest, France.
   CNRS
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-ODE-LPO
   PDG-ODE-ADM3
IN WOS Ifremer jusqu'en 2018
   copubli-france
IF 2.255
TC 32
UR https://archimer.ifremer.fr/doc/00038/14921/13751.pdf
LA English
DT Article
CR OVIDE 1
   OVIDE 2
   OVIDE 3
BO Thalassa
   Maria S. Merian
AB A method to estimate mass and heat transports across hydrographic sections using hydrography together with altimetry data in a geostrophic box inverse model is presented. Absolute surface velocities computed from AVISO altimetry products made up of a combination of sea surface height measurements and geoid estimate are first compared to Ship Acoustic Doppler Current Profiler (S-ADCP) measurements of the Ovide project along hydrographic sections repeated every 2 years in summer from Portugal to Greenland. The rms difference between S-ADCP and altimetry velocities averaged on distances of about a hundred km accounts to 3.3 cm s−1. Considering that the uncertainty of S-ADCP velocities is found at 1.5 cm s−1, altimetry errors are estimated at 3 cm s−1. Transports across Ovide sections previously obtained using S-ADCP data to constrain the geostrophic inverse box model are used as reference. The new method is found useful to estimate absolute transports across the sections, as well as part of their variability. Despite associated uncertainties about 50% larger than when S-ADCP is used, our results for the North Atlantic Current and heat transports, with uncertainties of 10 to 15%, reproduce the variability already observed. The largest uncertainties are found in the estimates of the East Greenland Irminger Current (EGIC) transport (30%), induced by larger uncertainties associated with altimetry data at the western boundary.
PY 2011
PD OCT
SO Journal Of Atmospheric And Oceanic Technology
SN 0739-0572
PU Amer Meteorological Soc
VL 28
IS 10
UT 000296658000013
BP 1324
EP 1337
DI 10.1175/2011JTECHO818.1
ID 14921
ER

EF