Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea
Recent research has focused on the changing ability of oceans to absorb atmospheric CO2 and the consequences for ocean acidification, with Arctic shelf seas being among the most sensitive regions. Hudson Bay is a large shelf sea in northern Canada whose location at the margin of the cryosphere place...
Published in: | Progress in Oceanography |
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Online Access: | http://hdl.handle.net/1993/34767 https://doi.org/10.1016/j.pocean.2020.102319 |
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ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/34767 2023-06-18T03:38:33+02:00 Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea Capelle, David W. Kuzyk, Zou Zou A. Papakyriakou, Tim Gueguen, Celine Miller, Lisa A. Macdonald, Robie W. 2020-07-10T15:46:42Z application/pdf http://hdl.handle.net/1993/34767 https://doi.org/10.1016/j.pocean.2020.102319 eng eng Elsevier Ltd. David W. Capelle, Zou Zou A. Kuzyk, Tim Papakyriakou, Céline Guéguen, Lisa A. Miller, Robie W. Macdonald, Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea, Progress in Oceanography, Volume 185, 2020, 102319, ISSN 0079-6611, https://doi.org/10.1016/j.pocean.2020.102319. http://hdl.handle.net/1993/34767 doi:10.1016/j.pocean.2020.102319 open access Aragonite Carbon-cycle Carbon-dioxide Arctic Ocean acidification Technical Report 2020 ftunivmanitoba https://doi.org/10.1016/j.pocean.2020.102319 2023-06-04T17:36:48Z Recent research has focused on the changing ability of oceans to absorb atmospheric CO2 and the consequences for ocean acidification, with Arctic shelf seas being among the most sensitive regions. Hudson Bay is a large shelf sea in northern Canada whose location at the margin of the cryosphere places it in the vanguard of global climate change. Here, we develop a four-compartment box-model and carbon budget using published and recently collected measurements to estimate carbon inputs, transformations, and losses within Hudson Bay. We estimate the annual effects of terrestrial carbon remineralization on aragonite saturation (ΩAr, a proxy for ocean acidification) and on the partial pressure of CO2 (pCO2, a proxy for air-sea CO2 flux) within each compartment, as well as the effects of marine primary production, marine organic carbon remineralization, and terrestrial calcium carbonate dissolution. We find that the remineralization of terrestrial dissolved organic carbon is the main driver of CO2 accumulation and aragonite under-saturation in coastal surface waters, but this is largely offset by marine primary production. Below the surface mixed layer, marine organic carbon remineralization is the largest contributor to CO2 accumulation and aragonite under-saturation, and is partially offset by terrestrial CaCO3 dissolution. Overall, the annual delivery and processing of carbon reduces ΩAr of water flowing through HB by up to 0.17 units and raises pCO2 by up to 165 μatm. The similarities between Hudson Bay and other Arctic shelf seas suggest these areas are also significantly influenced by terrestrial carbon inputs and transformation. Report Arctic Arctic Arctic Ocean Arctic Ocean Acidification Climate change Hudson Bay Ocean acidification MSpace at the University of Manitoba Arctic Arctic Ocean Canada Hudson Hudson Bay Progress in Oceanography 185 102319 |
institution |
Open Polar |
collection |
MSpace at the University of Manitoba |
op_collection_id |
ftunivmanitoba |
language |
English |
topic |
Aragonite Carbon-cycle Carbon-dioxide Arctic Ocean acidification |
spellingShingle |
Aragonite Carbon-cycle Carbon-dioxide Arctic Ocean acidification Capelle, David W. Kuzyk, Zou Zou A. Papakyriakou, Tim Gueguen, Celine Miller, Lisa A. Macdonald, Robie W. Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea |
topic_facet |
Aragonite Carbon-cycle Carbon-dioxide Arctic Ocean acidification |
description |
Recent research has focused on the changing ability of oceans to absorb atmospheric CO2 and the consequences for ocean acidification, with Arctic shelf seas being among the most sensitive regions. Hudson Bay is a large shelf sea in northern Canada whose location at the margin of the cryosphere places it in the vanguard of global climate change. Here, we develop a four-compartment box-model and carbon budget using published and recently collected measurements to estimate carbon inputs, transformations, and losses within Hudson Bay. We estimate the annual effects of terrestrial carbon remineralization on aragonite saturation (ΩAr, a proxy for ocean acidification) and on the partial pressure of CO2 (pCO2, a proxy for air-sea CO2 flux) within each compartment, as well as the effects of marine primary production, marine organic carbon remineralization, and terrestrial calcium carbonate dissolution. We find that the remineralization of terrestrial dissolved organic carbon is the main driver of CO2 accumulation and aragonite under-saturation in coastal surface waters, but this is largely offset by marine primary production. Below the surface mixed layer, marine organic carbon remineralization is the largest contributor to CO2 accumulation and aragonite under-saturation, and is partially offset by terrestrial CaCO3 dissolution. Overall, the annual delivery and processing of carbon reduces ΩAr of water flowing through HB by up to 0.17 units and raises pCO2 by up to 165 μatm. The similarities between Hudson Bay and other Arctic shelf seas suggest these areas are also significantly influenced by terrestrial carbon inputs and transformation. |
format |
Report |
author |
Capelle, David W. Kuzyk, Zou Zou A. Papakyriakou, Tim Gueguen, Celine Miller, Lisa A. Macdonald, Robie W. |
author_facet |
Capelle, David W. Kuzyk, Zou Zou A. Papakyriakou, Tim Gueguen, Celine Miller, Lisa A. Macdonald, Robie W. |
author_sort |
Capelle, David W. |
title |
Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea |
title_short |
Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea |
title_full |
Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea |
title_fullStr |
Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea |
title_full_unstemmed |
Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea |
title_sort |
effect of terrestrial organic matter on ocean acidification and co2 flux in an arctic shelf sea |
publisher |
Elsevier Ltd. |
publishDate |
2020 |
url |
http://hdl.handle.net/1993/34767 https://doi.org/10.1016/j.pocean.2020.102319 |
geographic |
Arctic Arctic Ocean Canada Hudson Hudson Bay |
geographic_facet |
Arctic Arctic Ocean Canada Hudson Hudson Bay |
genre |
Arctic Arctic Arctic Ocean Arctic Ocean Acidification Climate change Hudson Bay Ocean acidification |
genre_facet |
Arctic Arctic Arctic Ocean Arctic Ocean Acidification Climate change Hudson Bay Ocean acidification |
op_relation |
David W. Capelle, Zou Zou A. Kuzyk, Tim Papakyriakou, Céline Guéguen, Lisa A. Miller, Robie W. Macdonald, Effect of terrestrial organic matter on ocean acidification and CO2 flux in an Arctic shelf sea, Progress in Oceanography, Volume 185, 2020, 102319, ISSN 0079-6611, https://doi.org/10.1016/j.pocean.2020.102319. http://hdl.handle.net/1993/34767 doi:10.1016/j.pocean.2020.102319 |
op_rights |
open access |
op_doi |
https://doi.org/10.1016/j.pocean.2020.102319 |
container_title |
Progress in Oceanography |
container_volume |
185 |
container_start_page |
102319 |
_version_ |
1769003510801629184 |