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Impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean

Citation

Chierici, M and Fransson, A and Lansard, B and Miller, LA and Mucci, A and Shadwick, E and Thomas, H and Tremblay, J and Papakyriakou, TN, Impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean, Journal of Geophysical Research-Space Physics, 116, (C9) Article C00G09. ISSN 2156-2202 (2011) [Refereed Article]


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Copyright Statement

Copyright 2011 American Geophysical Union.

DOI: doi:10.1029/2011JC007184

Abstract

We report on measurements across an annual cycle of carbon dioxide system parameters in the polar mixed layer (PML) of the circumpolar flaw lead in the Amundsen Gulf, Arctic Ocean. From these and other properties (nitrate, S, T) of the PML, we found that biological processes (photosynthesis and respiration) accounted for about 50% of the monthly variations in the carbonate ion concentration, [CO32−] and ┘, the saturation state of these waters with respect to calcite (┘Ca) and aragonite (┘Ar). Vertical mixing and salinity changes had equal impacts over the annual cycle. The impact of sea ice meltwater resulted in decreasing ┘ values in summer, but most of this change was offset by the ┘ increase as a result of CO2 drawdown during biological photosynthesis.

Item Details

Item Type:Refereed Article
Keywords:Arctic Ocean, Carbonate Saturation State, Biogeochemistry
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Chemical Oceanography
Objective Division:Environment
Objective Group:Physical and Chemical Conditions of Water
Objective Field:Physical and Chemical Conditions of Water in Coastal and Estuarine Environments
Author:Shadwick, E (Dr Elizabeth Shadwick)
ID Code:75929
Year Published:2011
Web of Science® Times Cited:18
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2012-02-21
Last Modified:2017-10-31
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