How much arctic fresh water participates in the subpolar overturning circulation?
Fresh Arctic waters flowing into the Atlantic are thought to have two primary fates. They may be mixed into the deep ocean as part of the overturning circulation, or flow alongside regions of deep water formation without impacting overturning. Climate models suggest that as increasing amounts of fre...
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Online Access: | https://hdl.handle.net/11250/2992174 https://doi.org/10.1175/JPO-D-20-0240.1 |
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ftunivbergen:oai:bora.uib.no:11250/2992174 2023-05-15T14:49:18+02:00 How much arctic fresh water participates in the subpolar overturning circulation? Le Bras, Isabela Straneo, Fiamma Muilwijk, Morven Smedsrud, Lars Henrik Li, Feili Susan Lozier, Lozier Penny Holliday, Holliday 2021 application/pdf https://hdl.handle.net/11250/2992174 https://doi.org/10.1175/JPO-D-20-0240.1 eng eng AMS urn:issn:0022-3670 https://hdl.handle.net/11250/2992174 https://doi.org/10.1175/JPO-D-20-0240.1 cristin:1922228 Journal of Physical Oceanography. 2021, 51 (3), 955-973. Copyright 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses) Journal of Physical Oceanography 955-973 51 3 Journal article Peer reviewed 2021 ftunivbergen https://doi.org/10.1175/JPO-D-20-0240.1 2023-03-14T17:38:45Z Fresh Arctic waters flowing into the Atlantic are thought to have two primary fates. They may be mixed into the deep ocean as part of the overturning circulation, or flow alongside regions of deep water formation without impacting overturning. Climate models suggest that as increasing amounts of freshwater enter the Atlantic, the overturning circulation will be disrupted, yet we lack an understanding of how much freshwater is mixed into the overturning circulation’s deep limb in the present day. To constrain these freshwater pathways, we build steady-state volume, salt, and heat budgets east of Greenland that are initialized with observations and closed using inverse methods. Freshwater sources are split into oceanic Polar Waters from the Arctic and surface freshwater fluxes, which include net precipitation, runoff, and ice melt, to examine how they imprint the circulation differently. We find that 65 mSv (1 Sv ≡ 106 m3 s−1) of the total 110 mSv of surface freshwater fluxes that enter our domain participate in the overturning circulation, as do 0.6 Sv of the total 1.2 Sv of Polar Waters that flow through Fram Strait. Based on these results, we hypothesize that the overturning circulation is more sensitive to future changes in Arctic freshwater outflow and precipitation, while Greenland runoff and iceberg melt are more likely to stay along the coast of Greenland. publishedVersion Article in Journal/Newspaper Arctic Fram Strait Greenland Iceberg* University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Greenland Journal of Physical Oceanography 51 3 955 973 |
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Open Polar |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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ftunivbergen |
language |
English |
description |
Fresh Arctic waters flowing into the Atlantic are thought to have two primary fates. They may be mixed into the deep ocean as part of the overturning circulation, or flow alongside regions of deep water formation without impacting overturning. Climate models suggest that as increasing amounts of freshwater enter the Atlantic, the overturning circulation will be disrupted, yet we lack an understanding of how much freshwater is mixed into the overturning circulation’s deep limb in the present day. To constrain these freshwater pathways, we build steady-state volume, salt, and heat budgets east of Greenland that are initialized with observations and closed using inverse methods. Freshwater sources are split into oceanic Polar Waters from the Arctic and surface freshwater fluxes, which include net precipitation, runoff, and ice melt, to examine how they imprint the circulation differently. We find that 65 mSv (1 Sv ≡ 106 m3 s−1) of the total 110 mSv of surface freshwater fluxes that enter our domain participate in the overturning circulation, as do 0.6 Sv of the total 1.2 Sv of Polar Waters that flow through Fram Strait. Based on these results, we hypothesize that the overturning circulation is more sensitive to future changes in Arctic freshwater outflow and precipitation, while Greenland runoff and iceberg melt are more likely to stay along the coast of Greenland. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Le Bras, Isabela Straneo, Fiamma Muilwijk, Morven Smedsrud, Lars Henrik Li, Feili Susan Lozier, Lozier Penny Holliday, Holliday |
spellingShingle |
Le Bras, Isabela Straneo, Fiamma Muilwijk, Morven Smedsrud, Lars Henrik Li, Feili Susan Lozier, Lozier Penny Holliday, Holliday How much arctic fresh water participates in the subpolar overturning circulation? |
author_facet |
Le Bras, Isabela Straneo, Fiamma Muilwijk, Morven Smedsrud, Lars Henrik Li, Feili Susan Lozier, Lozier Penny Holliday, Holliday |
author_sort |
Le Bras, Isabela |
title |
How much arctic fresh water participates in the subpolar overturning circulation? |
title_short |
How much arctic fresh water participates in the subpolar overturning circulation? |
title_full |
How much arctic fresh water participates in the subpolar overturning circulation? |
title_fullStr |
How much arctic fresh water participates in the subpolar overturning circulation? |
title_full_unstemmed |
How much arctic fresh water participates in the subpolar overturning circulation? |
title_sort |
how much arctic fresh water participates in the subpolar overturning circulation? |
publisher |
AMS |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2992174 https://doi.org/10.1175/JPO-D-20-0240.1 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Fram Strait Greenland Iceberg* |
genre_facet |
Arctic Fram Strait Greenland Iceberg* |
op_source |
Journal of Physical Oceanography 955-973 51 3 |
op_relation |
urn:issn:0022-3670 https://hdl.handle.net/11250/2992174 https://doi.org/10.1175/JPO-D-20-0240.1 cristin:1922228 Journal of Physical Oceanography. 2021, 51 (3), 955-973. |
op_rights |
Copyright 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses) |
op_doi |
https://doi.org/10.1175/JPO-D-20-0240.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
51 |
container_issue |
3 |
container_start_page |
955 |
op_container_end_page |
973 |
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1766320359086227456 |