Spatial and temporal variability of ice algal production in a 3D ice–ocean model of the Hudson Bay, Hudson Strait and Foxe Basin system

Polar research

Michel Starr¹  Simon Senneville²  François Saucier²  Michel Gosselin²  Virginie Sibert³  Bruno Zakardjian⁴ 

[1] Pêches et Océans Canada, Institut Maurice-Lamontagne, 850 Route de la Mer, CP 1000 Mont-Joli, Quebec G5H 3Z4, Canada;Université du Québec à Rimouski, Institut des Sciences de la Mer, 310 Allée des Ursulines, CP 3300 Rimouski, Quebec G5L 3A1, Canada;Université du Québec à Rimouski, Institut des Sciences de la Mer, 310 Allée des Ursulines, CP 3300 Rimouski, Quebec G5L 3A1, CanadaCorrespondence;Université du Sud Toulon-Var, Laboratoire de sondages Electromagnétiques de l’Environnement Terrestre, Bâtiment F, BP 20132, 83957 La Garde Cedex, France

关键词: Hudson Bay;    ice algae;    primary production;    regional ocean model;    sea ice;   

DOI  :  10.3402/polar.v29i3.6084

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Primary production, the basic component of the food web and a sink for dissolved inorganic carbon, is a major unknown in Arctic seas, particularly ice algal production, for which detailed and comprehensive studies are often limited in space and time. We present here a simple ice alga model and its coupling with a regional 3D ice–ocean model of the Hudson Bay system (HBS), including Hudson Strait and Foxe Basin, as a first attempt to estimate ice algal production and its potential contribution to the pelagic ecosystem on a regional scale. The ice algal growth rate is forced by sub-ice light and nutrient availability, whereas grazing and ice melt control biomass loss from the underside of the ice. The simulation shows the primary role of sea-ice dynamics on the distribution and production of ice algae with a high spatio-temporal variability in response to the great variability of ice conditions in different parts of the HBS. In addition to favourable light and nutrient conditions, there must be a sufficient...

【 授权许可】

CC BY-NC