Contribution of under-ice primary production to an ice-edge upwelling phytoplankton bloom in the Canadian Beaufort Sea - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2009

Contribution of under-ice primary production to an ice-edge upwelling phytoplankton bloom in the Canadian Beaufort Sea

C. J. Mundy
  • Fonction : Auteur
Michel Gosselin
  • Fonction : Auteur
Yves Gratton
  • Fonction : Auteur
Andrea Rossnagel
  • Fonction : Auteur
David G. Barber
  • Fonction : Auteur
Johannie Martin
  • Fonction : Auteur
Jean-Éric Tremblay
  • Fonction : Auteur
Molly Palmer
  • Fonction : Auteur
Kevin R. Arrigo
  • Fonction : Auteur
Gérald Darnis
  • Fonction : Auteur
Louis Fortier
  • Fonction : Auteur
Brent Else
  • Fonction : Auteur
Tim Papakyriakou
  • Fonction : Auteur

Résumé

The Canadian Beaufort Sea has been categorized as an oligotrophic system with the potential for enhanced production due to a nutrient-rich intermediate layer of Pacific-origin waters. Using under-ice hydrographic data collected near the ice-edge of a shallow Arctic bay, we documented an ice-edge upwelling event that brought nutrient-rich waters to the surface during June 2008. The event resulted in a 3-week long phytoplankton bloom that produced an estimated 31 g C m-2 of new production. This value was approximately twice that of previous estimates for annual production in the region, demonstrating the importance of ice-edge upwelling to the local marine ecosystem. Under-ice primary production estimates of up to 0.31 g C m-2 d-1 showed that this production was not negligible, contributing up to 22% of the daily averaged production of the ice-edge bloom. It is suggested that under-ice blooms are a widespread yet under-documented phenomenon in polar regions, which could increase in importance with the Arctic's thinning ice cover and subsequent increase in transmitted irradiance to the under-ice environment.
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hal-04110655 , version 1 (31-05-2023)

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C. J. Mundy, Michel Gosselin, Jens Ehn, Yves Gratton, Andrea Rossnagel, et al.. Contribution of under-ice primary production to an ice-edge upwelling phytoplankton bloom in the Canadian Beaufort Sea. Geophysical Research Letters, 2009, 36, ⟨10.1029/2009GL038837⟩. ⟨hal-04110655⟩
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