FN Archimer Export Format
PT J
TI Surface water circulation patterns in the southeastern bay of biscay: new evidences from hf radar data
BT 
AF SOLABARRIETA, Lohitzune
   RUBIO, Anna
   CASTANEDO, Sonia
   MEDINA, Raul
   CHARRIA, Guillaume
   HERNANDEZ, Carl
AS 1:1;2:1;3:2;4:2;5:3;6:1;
FF 1:;2:;3:;4:;5:PDG-ODE-DYNECO-PHYSED;6:;
C1 AZTI Tecnalia, Pasaia 20110, Gipuzkoa, Spain.
   Inst Hidraul Ambiental IH Cantabria, Santander 39011, Spain.
   IFREMER, DYNECO Lab Phys Hydrodynam & Sedimentaire, F-29280 Plouzane, France.
C2 AZTI, SPAIN
   INST HIDRAUL AMBIENTAL IH CANTABRIA, SPAIN
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-DYNECO-PHYSED
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 1.892
TC 41
UR https://archimer.ifremer.fr/doc/00169/28063/26380.pdf
LA English
DT Article
DE ;HF radar;Surface circulation patterns;Seasonal and mesoscale variability;Inertial currents;Bay of Biscay;Iberian Poleward Current (IPC)
AB High Frequency (HF) radar stations have been working operationally in the southeastern part of the Bay of Biscay since 2009. The (2) systems provide hourly surface currents, with 5 km spatial resolution and a radial coverage lying close to 180 km. The detailed and quantitative description of the spatial patterns observed by the HF radar offers new evidence on the main ocean processes, at different time scales, affecting a study area where surface currents show marked temporal and spatial variability. A clear seasonality in terms of sea surface currents and along-slope circulation is observed, with cyclonic and anticyclonic patterns during the winter and summer months, respectively. From the analysis of low-pass filtered currents, a key component of this seasonal variability is associated with the surface signature of the slope current (Iberian Poleward Current (IPC)). Clearly intensified over the upper part of the slope, this current circulates eastward off the Spanish coast and northward over the French shelves in winter.  Examination of the HF radar current fields reveals the presence of mesoscale structures over the area. At higher frequencies, an EOF (Empirical Orthogonal Function) analysis of the inertial band-pass filtered data is used to study the complex spatial and temporal patterns associated with these processes and to evaluate quantitatively the relative contribution of the high frequency to the total variability, in space and time. Overall, inertial currents represent between 10 and 40% of the total variability; their contribution is significantly greater in summer and over the deeper part of the slope. Tides contribute much less than the total Kinetic Energy (KE), although their contribution over the shelf can be higher than that of the inertial oscillations, during winter.
PY 2014
PD FEB
SO Continental Shelf Research
SN 0278-4343
PU Pergamon-elsevier Science Ltd
VL 74
UT 000331681600006
BP 60
EP 76
DI 10.1016/j.csr.2013.11.022
ID 28063
ER

EF