DataSheet_1_Using Radiocarbon Measurements of Dissolved Inorganic Carbon to Determine a Revised Residence Time for Deep Baffin Bay.pdf
The Canadian Arctic is warming at three times the rate of the rest of the planet and the effects of climate change on the Arctic marine carbon cycle remains unconstrained. Baffin Bay is a semi-enclosed, Arctic basin that connects the Arctic Ocean to the north to the Labrador Sea to the south. While...
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ftfrontimediafig:oai:figshare.com:article/19663209 2023-05-15T14:29:19+02:00 DataSheet_1_Using Radiocarbon Measurements of Dissolved Inorganic Carbon to Determine a Revised Residence Time for Deep Baffin Bay.pdf Sara Zeidan Jennifer Walker Brent G. T. Else Lisa A. Miller Kumiko Azetsu-Scott Brett D. Walker 2022-04-27T05:40:53Z https://doi.org/10.3389/fmars.2022.845536.s001 https://figshare.com/articles/dataset/DataSheet_1_Using_Radiocarbon_Measurements_of_Dissolved_Inorganic_Carbon_to_Determine_a_Revised_Residence_Time_for_Deep_Baffin_Bay_pdf/19663209 unknown doi:10.3389/fmars.2022.845536.s001 https://figshare.com/articles/dataset/DataSheet_1_Using_Radiocarbon_Measurements_of_Dissolved_Inorganic_Carbon_to_Determine_a_Revised_Residence_Time_for_Deep_Baffin_Bay_pdf/19663209 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering dissolved inorganic carbon DIC 13C 14C anthropogenic bomb residence time Baffin Bay Dataset 2022 ftfrontimediafig https://doi.org/10.3389/fmars.2022.845536.s001 2022-04-27T23:03:23Z The Canadian Arctic is warming at three times the rate of the rest of the planet and the effects of climate change on the Arctic marine carbon cycle remains unconstrained. Baffin Bay is a semi-enclosed, Arctic basin that connects the Arctic Ocean to the north to the Labrador Sea to the south. While the physical oceanography of surface Baffin Bay is well characterized, less is known about deep water formation mechanisms within the Basin. Only a few residence-time estimates for Baffin Bay Deep Water (BBDW) exist and range from 20 to 1450 years. Better residence time estimates are needed to understand the oceanographic significance of Baffin Bay. Here we report stable carbon (δ 13 C) and radiocarbon (Δ 14 C) values of dissolved inorganic carbon (DIC) collected aboard the CCGS Amundsen in 2019. DIC δ 13 C and Δ 14 C values between ranged between -0.7‰ to +1.9‰ and -90.0‰ to +29.8‰, respectively. Surface DIC δ 13 C values were between +0.7‰ to +1.9‰, while deep (>100m) values were 0.0 to -0.7‰. Surface DIC Δ 14 C values ranged between -5.4‰ to +22.9‰, while deep DIC (>1400m) DIC Δ 14 C averaged -82.2 ± 8.5‰ (n = 9). To constrain natural DIC Δ 14 C values, we quantified the amount of atmospheric “bomb” 14 C in DIC (Δ 14 C bomb using the potential alkalinity method; P alk ) and anthropogenic DIC (DIC anth using the ΔC * method). Both proxies indicate an absence of Δ 14 C bomb and DIC anth below 1000m. Using two previously proposed deep water formation mechanisms and our corrected DIC Δ 14 C natural values, we estimated a 14 C-based residence time of 360-690 years for BBDW. Based on these residence times, we infer carbon is likely stored for centuries in deep Baffin Bay. Dataset Arctic Basin Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change Labrador Sea Frontiers: Figshare Arctic Arctic Ocean Baffin Bay |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering dissolved inorganic carbon DIC 13C 14C anthropogenic bomb residence time Baffin Bay |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering dissolved inorganic carbon DIC 13C 14C anthropogenic bomb residence time Baffin Bay Sara Zeidan Jennifer Walker Brent G. T. Else Lisa A. Miller Kumiko Azetsu-Scott Brett D. Walker DataSheet_1_Using Radiocarbon Measurements of Dissolved Inorganic Carbon to Determine a Revised Residence Time for Deep Baffin Bay.pdf |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering dissolved inorganic carbon DIC 13C 14C anthropogenic bomb residence time Baffin Bay |
description |
The Canadian Arctic is warming at three times the rate of the rest of the planet and the effects of climate change on the Arctic marine carbon cycle remains unconstrained. Baffin Bay is a semi-enclosed, Arctic basin that connects the Arctic Ocean to the north to the Labrador Sea to the south. While the physical oceanography of surface Baffin Bay is well characterized, less is known about deep water formation mechanisms within the Basin. Only a few residence-time estimates for Baffin Bay Deep Water (BBDW) exist and range from 20 to 1450 years. Better residence time estimates are needed to understand the oceanographic significance of Baffin Bay. Here we report stable carbon (δ 13 C) and radiocarbon (Δ 14 C) values of dissolved inorganic carbon (DIC) collected aboard the CCGS Amundsen in 2019. DIC δ 13 C and Δ 14 C values between ranged between -0.7‰ to +1.9‰ and -90.0‰ to +29.8‰, respectively. Surface DIC δ 13 C values were between +0.7‰ to +1.9‰, while deep (>100m) values were 0.0 to -0.7‰. Surface DIC Δ 14 C values ranged between -5.4‰ to +22.9‰, while deep DIC (>1400m) DIC Δ 14 C averaged -82.2 ± 8.5‰ (n = 9). To constrain natural DIC Δ 14 C values, we quantified the amount of atmospheric “bomb” 14 C in DIC (Δ 14 C bomb using the potential alkalinity method; P alk ) and anthropogenic DIC (DIC anth using the ΔC * method). Both proxies indicate an absence of Δ 14 C bomb and DIC anth below 1000m. Using two previously proposed deep water formation mechanisms and our corrected DIC Δ 14 C natural values, we estimated a 14 C-based residence time of 360-690 years for BBDW. Based on these residence times, we infer carbon is likely stored for centuries in deep Baffin Bay. |
format |
Dataset |
author |
Sara Zeidan Jennifer Walker Brent G. T. Else Lisa A. Miller Kumiko Azetsu-Scott Brett D. Walker |
author_facet |
Sara Zeidan Jennifer Walker Brent G. T. Else Lisa A. Miller Kumiko Azetsu-Scott Brett D. Walker |
author_sort |
Sara Zeidan |
title |
DataSheet_1_Using Radiocarbon Measurements of Dissolved Inorganic Carbon to Determine a Revised Residence Time for Deep Baffin Bay.pdf |
title_short |
DataSheet_1_Using Radiocarbon Measurements of Dissolved Inorganic Carbon to Determine a Revised Residence Time for Deep Baffin Bay.pdf |
title_full |
DataSheet_1_Using Radiocarbon Measurements of Dissolved Inorganic Carbon to Determine a Revised Residence Time for Deep Baffin Bay.pdf |
title_fullStr |
DataSheet_1_Using Radiocarbon Measurements of Dissolved Inorganic Carbon to Determine a Revised Residence Time for Deep Baffin Bay.pdf |
title_full_unstemmed |
DataSheet_1_Using Radiocarbon Measurements of Dissolved Inorganic Carbon to Determine a Revised Residence Time for Deep Baffin Bay.pdf |
title_sort |
datasheet_1_using radiocarbon measurements of dissolved inorganic carbon to determine a revised residence time for deep baffin bay.pdf |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.845536.s001 https://figshare.com/articles/dataset/DataSheet_1_Using_Radiocarbon_Measurements_of_Dissolved_Inorganic_Carbon_to_Determine_a_Revised_Residence_Time_for_Deep_Baffin_Bay_pdf/19663209 |
geographic |
Arctic Arctic Ocean Baffin Bay |
geographic_facet |
Arctic Arctic Ocean Baffin Bay |
genre |
Arctic Basin Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change Labrador Sea |
genre_facet |
Arctic Basin Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change Labrador Sea |
op_relation |
doi:10.3389/fmars.2022.845536.s001 https://figshare.com/articles/dataset/DataSheet_1_Using_Radiocarbon_Measurements_of_Dissolved_Inorganic_Carbon_to_Determine_a_Revised_Residence_Time_for_Deep_Baffin_Bay_pdf/19663209 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.845536.s001 |
_version_ |
1766303364589551616 |