FN Archimer Export Format PT J TI Moored observations of mesoscale features in the Cape Basin: characteristics and local impacts on water mass distributions BT AF KERSALE, Marion LAMONT, Tarron SPEICH, Sabrina TERRE, Thierry LAXENAIRE, Remi ROBERTS, Mike J. VAN DEN BERG, Marcel A. ANSORGE, Isabelle J. AS 1:1,2,3;2:1,4;3:5;4:6;5:5;6:4,7;7:4;8:1; FF 1:;2:;3:;4:PDG-ODE-LOPS;5:;6:;7:;8:; C1 Univ Cape Town, Dept Oceanog, Marine Res Inst, Rondebosch, South Africa. Univ Miami, Cooperat Inst Marine & Atmospher Studies, Miami, FL 33146 USA. NOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149 USA. Oceans & Coastal Res, Dept Environm Affairs, Cape Town, South Africa. CNRS, ENS, UMR Ecole Polytech 8539, Lab Meteorol Dynam, Paris, France. Univ Brest, IFREMER, CNRS, IRD,LOPS,IUEM, Plouzane, France. Nelson Mandela Univ, Ocean Sci & Marine Food Secur, Port Elizabeth, South Africa. C2 UNIV CAPE TOWN, SOUTH AFRICA UNIV MIAMI, USA NOAA, USA OCEANS & COASTS RES, SOUTH AFRICA CNRS, FRANCE IFREMER, FRANCE UNIV NELSON MANDELA, SOUTH AFRICA SI BREST SE PDG-ODE-LOPS UM LOPS IN WOS Ifremer jusqu'en 2018 DOAJ copubli-france copubli-int-hors-europe copubli-sud IF 2.539 TC 10 UR https://archimer.ifremer.fr/doc/00456/56806/58671.pdf LA English DT Article AB The eastern side of the South Atlantic Meridional overturning circulation Basin-wide Array (SAMBA) along 34.5 degrees S is used to assess the nonlinear, mesoscale dynamics of the Cape Basin. This array presently consists of current meter moorings and bottom mounted Current and Pressure recording Inverted Echo Sounders (CPIES) deployed across the continental slope. These data, available from September 2014 to December 2015, combined with satellite altimetry allow us to investigate the characteristics and the impact of mesoscale dynamics on local water mass distribution and cross-validate the different data sets. We demonstrate that the moorings are affected by the complex dynamics of the Cape Basin involving Agulhas rings, cyclonic eddies and anticyclonic eddies from the Agulhas Bank and the South Benguela upwelling front and filaments. Our analyses show that exchange of water masses happens through the advection of water by mesoscale eddies but also via wide water mass intrusions engendered by the existence of intense dipoles. These complex dynamics induce strong intra-seasonal upper-ocean velocity variations and water mass exchanges between the shelf and the open ocean but also across the subantarctic and subtropical waters. This work presents the first independent observations comparison between full-depth moorings and CPIES data sets within the eastern South Atlantic region that gives some evidence of eastern boundary buoyancy anomalies associated with migrating eddies. It also high- lights the need to continuously sample the full water depth as inter-basin exchanges occur intermittently and affect the whole water column. PY 2018 PD SEP SO Ocean Science SN 1812-0784 PU Copernicus Gesellschaft Mbh VL 14 IS 5 UT 000443433000001 BP 923 EP 945 DI 10.5194/os-14-923-2018 ID 56806 ER EF