FN Archimer Export Format PT J TI Coccolith-derived turbidity and hydrological conditions in May in the Bay of Biscay BT AF PERROT, Laurie GOHIN, Francis RUIZ-PINO, Diana LAMPERT, Luis HURET, Martin DESSIER, Aurelie MALESTROIT, Pascale DUPUY, Christine BOURRIAU, Paul AS 1:1;2:1;3:2;4:1;5:3;6:4;7:1;8:4;9:5; FF 1:PDG-ODE-DYNECO-PELAGOS;2:PDG-ODE-DYNECO-PELAGOS;3:;4:PDG-ODE-DYNECO-PELAGOS;5:PDG-RBE-STH-LBH;6:;7:PDG-ODE-DYNECO-PELAGOS;8:;9:PDG-RBE-EMH; C1 IFREMER, DYNECO PELAGOS, Ctr Ifremer Brest CS 10070, F-29280 Plouzane, France. Univ Paris 06, Lab LOCEAN CNRS IPSL, F-75005 Paris, France. IFREMER, STH LBH, Ctr Ifremer Brest CS 10070, F-29280 Plouzane, France. Univ La Rochelle, CNRS, UMR 7266, Littoral Environm & Soc LIENSs, 2 Rue Olympe de Gouges, F-17042 La Rochelle 01, France. IFREMER, EMH, Rue Ile dYeu BP 21105, F-44311 Nantes 03, France. C2 IFREMER, FRANCE UNIV PARIS 06, FRANCE IFREMER, FRANCE UNIV LA ROCHELLE, FRANCE IFREMER, FRANCE SI BREST NANTES SE PDG-ODE-DYNECO-PELAGOS PDG-RBE-STH-LBH PDG-RBE-EMH IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 3.245 TC 6 UR https://archimer.ifremer.fr/doc/00416/52790/53689.pdf LA English DT Article CR PELGAS PELGAS 2012 PELGAS 2013 PELGAS 2014 PELGAS 2015 BO Thalassa DE ;Bay of Biscay;Ocean colour;Suspended particulate matter;Turbidity;Coccoliths;Stratification AB Coccolithophore blooms occur regularly from April to June in the Bay of Biscay where they have been observed for many years from ocean-colour imagery thanks to the ability of their calcite plates to scatter light. They are easily depicted on interpolated images of non-algal Suspended Particulate Matter (SPM) derived from satellite reflectance data in May, at the time of the PELGAS (PELagique GAScogne) annual surveys. Over the springs 2012 to 2015, the PELGAS surveys provided in-situ data on the turbidity throughout the water column and on the hydrological environment prevailing during the blooms in the vicinity of the continental shelf break. The satellite-derived SPM in the area of coccolithophore blooms was closely related to measured turbidity in the euphotic zone. The deep maxima of coccolithophore-derived biomass were well observed in the turbidity signal throughout the water column. Despite the recurrence of SPM patterns due to coccolithophores in the well-mixed waters over the shelf break in spring, the variability of the satellite-derived SPM and the turbidity profiles was particularly high during the four years studied. The year 2013 showed persistent blooms from mid-April to the end of May over large areas inside and outside the shelf waters, whereas no bloom was observed in 2014, neither on SPM images nor through turbidity profiles. The presence or absence of coccolithophore blooms during the years 2012-2015 seem related to the level of stratification of the water column, with more intense blooms occurring during mixed conditions. These results should improve classification of the PELGAS surveys from those occurring in a coccolith-rich environment, synonymous with mixed and cold waters, to those occurring in a coccolith-poor environment where surface waters are warmer and more stratified. PY 2018 PD SEP SO Progress In Oceanography SN 0079-6611 PU Pergamon-elsevier Science Ltd VL 166 UT 000442979000006 BP 41 EP 53 DI 10.1016/j.pocean.2017.12.008 ID 52790 ER EF