FN Archimer Export Format
PT J
TI The physical oceanography of Fortune Bay, an overview
BT 
AF Donnet, Sebastien
   Lazure, Pascal
   Ratsimandresy, Andry
   Han, Guoqi
AS 1:1,4;2:2;3:3;4:1;
FF 1:;2:PDG-ODE-LOPS-OC;3:;4:;
C1 Fisheries and Oceans Canada, Institute of Ocean Sciences, 9860 West Saanich Road, Sidney, BC, V8L 4B2, Canada
   Ifremer, Laboratoire d’Océanographie Physique et Spatiale, Centre Bretagne, ZI de la Pointe du Diable, CS 10070, 29280 Plouzané, France
   Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, 80 East White Hills Rd, St. John’s NL, A1C 5X1, Canada
   Université de Bretagne Occidentale, Ecole Doctorale N°598 Science de la Mer et du littoral, Brest, France
C2 MPO, CANADA
   IFREMER, FRANCE
   MPO, CANADA
   UBO, FRANCE
SI BREST
SE PDG-ODE-LOPS-OC
UM LOPS
IN WOS Ifremer UMR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 2.1
TC 0
UR https://archimer.ifremer.fr/doc/00800/91241/97001.pdf
   https://archimer.ifremer.fr/doc/00800/91241/97002.docx
LA English
DT Article
DE ;Broad fjord;Hydrographic climate;Wind;Tides;Circulation;Along-shore current pulses;Water exchanges
AB This paper describes the physical oceanography of Fortune Bay, a broad, mid-latitude fjord located in Newfoundland (Canada). Fortune Bay is subject to a strong seasonal stratification (0–16 °C sea-surface temperature range with up to 1 °C/m vertical gradient) influenced by local freshwater runoff, wind forcing and shelf inputs. Sea-ice is seldom present in the bay and unlikely to be of importance on the seasonal stratification and mixing processes. Fortune Bay is warmer than its adjacent shelf both at the surface (by about 2 °C) and at intermediate depths (by about 1 °C from 50–150 m). While the former is likely due to local freshwater runoff stratification influence, the latter is probably related to the warm, deep water input occurring in winter below sill depth and subsequently mixed with the intermediate layer via the input of a colder water mass flowing in summer and which eventually reaches the bottom as well. Currents are dominated by the ‘weather band’ (2–20 d) and characterized by energetic pulses associated with downwelling and upwelling events. Mean circulation is rather weak and the seasonal pattern obtained her e did not reveal either the presence of a distinct estuarine circulation nor a strong influence of the main coastal current. Tidal currents are weak also and no inertial signal was observed. Estimates of water exchange between the inner and outer part of the bay were calculated using several methods and led to residence times of the order of a few to several months for the upper layers and of the order of a year for the bottom layer with a probable strong seasonal variability (larger residence time in summer for the upper layers). The “baroclinic pumping” processes, which include the downwelling/upwelling events, appear to be important players but more work is needed to better understand their nature and actual contribution. 
PY 2022
PD NOV
SO Regional Studies In Marine Science
SN 2352-4855
PU Elsevier BV
VL 56
UT 000901657300004
DI 10.1016/j.rsma.2022.102698
ID 91241
ER

EF