FN Archimer Export Format
PT J
TI Spatial and Seasonal Distributions of Frontal Activity over the French Continental Shelf in the Bay of Biscay
BT 
AF YELEKCI, Ozge
   CHARRIA, Guillaume
   CAPET, Xavier
   REVERDIN, Gilles
   SUDRE, Joel
   YAHIA, Hussein
AS 1:1;2:1;3:2;4:2;5:3;6:4;
FF 1:PDG-ODE-LOPS-OC;2:PDG-ODE-LOPS-OC;3:;4:;5:;6:;
C1 Univ Brest, CNRS, IFREMER, IRD,LOPS,IUEM, F-29280 Brest, France.
   CNRS UPMC IRD MNHN, LOCEAN IPSL, Paris, France.
   Univ Toulouse, UPS, CNRS, LEGOS,CNES,IRD, Toulouse, France.
   INRIA Bordeaux Sud Ouest, GeoStat Team, Talence, France.
C2 IFREMER, FRANCE
   UNIV PARIS 06, FRANCE
   UNIV TOULOUSE, FRANCE
   INRIA, FRANCE
SI BREST
SE PDG-ODE-LOPS-OC
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.942
TC 11
UR https://archimer.ifremer.fr/doc/00389/50013/50602.pdf
LA English
DT Article
DE ;Bay of Biscay;Fronts;Submesoscale;Satellite;Sea surface temperature;Singularity exponent
AB The frontal activity in coastal regions remains a research field where a large number of open questions needs to be addressed to quantify the potential impact of these processes on dependent systems (e.g. biogeochemical activity). Spatial and seasonal distributions of Sea Surface Temperature (SST) fronts (∼1-100 km) in the vicinity of main French rivers, Gironde and Loire, are explored over the continental shelf North of 45 °N in the Bay of Biscay. A high resolution (1 km spatial and daily temporal resolutions) dataset of 11 years' (2003 to 2013) remotely sensed SST by MODIS sensor onboard Aqua and Terra satellites has been investigated and compared with coastal numerical model experiments. The detection and characterization fronts with fluctuating amplitudes is achieved through the Singularity Analysis (i.e. the process of calculating the degree of regularity or irregularity of a function at each point in a domain). Seasonality of frontal activity in the Bay of Biscay is then described based on the long-term satellite SST archive and coastal operational model simulations. The identified hot spots of higher frontal occurrences correspond on one hand to previously observed features (e.g. tidal fronts) but also reveal new features. These are investigated to identify fine-scale dynamical drivers. In winter, density fronts are prominent in a coastal strip where freshwater influence is important. In spring, this strip diminishes as plumes detach from the coast, while tidal fronts become apparent in other regions. In summer, tidal fronts in Ushant region and internal wave activity along the shelf break dominate. In autumn, coastal density fronts due to freshwater inputs reappear as these inputs increase, and reduced stratification causes a weakening of the Ushant and shelf break fronts. Additional information and an effort to dynamically interpret these fronts, based on a systematic investigation of the whole seasonal cycle and including modeling insights from coastal operational oceanography, complement the description of frontal activity in the Bay of Biscay. 
PY 2017
PD JUN
SO Continental Shelf Research
SN 0278-4343
PU Pergamon-elsevier Science Ltd
VL 144
UT 000407660600007
BP 65
EP 79
DI 10.1016/j.csr.2017.06.015
ID 50013
ER

EF