Interannual variability of the Pacific water boundary current in the Beaufort Sea
Thesis: S.M., Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2013. Includes bibliographical references (pages 133-141). Between 2002 and 2011 a single mooring was main...
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ftmit:oai:dspace.mit.edu:1721.1/85389 2023-06-11T04:03:20+02:00 Interannual variability of the Pacific water boundary current in the Beaufort Sea Brugler, Eric T Woods Hole Oceanographic Institution. Joint Program in Applied Ocean Physics and Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering r --- 2013 141 pages application/pdf http://hdl.handle.net/1721.1/85389 eng eng Massachusetts Institute of Technology http://hdl.handle.net/1721.1/85389 864393472 M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Joint Program in Applied Ocean Science and Engineering Mechanical Engineering Woods Hole Oceanographic Institution Ocean circulation Ocean-atmosphere interaction Thesis 2013 ftmit 2023-05-29T08:38:45Z Thesis: S.M., Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2013. Includes bibliographical references (pages 133-141). Between 2002 and 2011 a single mooring was maintained in the core of the Pacific Water boundary current in the Alaskan Beaufort Sea near 152° W. Using velocity and hydrographic data from six year-long deployments during this time period, we examine the interannual variability of the current. It is found that the volume, heat, and freshwater transport have all decreased drastically over the decade, by more than 80%. The most striking changes have occurred during the summer months. Using a combination of weather station data, atmospheric reanalysis fields, and concurrent shipboard and mooring data from the Chukchi Sea, we investigate the physical drivers responsible for these changes. It is demonstrated that an increase in summertime easterly winds along the Beaufort slope is the primary reason for the drop in transport. The intensification of the local winds has in turn been driven by a strengthening of the summer Beaufort High in conjunction with a deepening of the summer Aleutian Low. Since the fluxes of mass, heat, and freshwater through Bering Strait have increased over the same time period, this raises the question as to the fate of the Pacific water during recent years and its impacts. We present evidence that more heat has been fluxed directly into the interior basin from Barrow Canyon rather than entering the Beaufort shelfbreak jet, and this is responsible for a significant portion of the increased ice melt in the Pacific sector of the Arctic Ocean. by Eric T. Brugler. S.M. Thesis aleutian low Arctic Arctic Ocean Beaufort Sea Bering Strait Chukchi Chukchi Sea DSpace@MIT (Massachusetts Institute of Technology) Arctic Arctic Ocean Chukchi Sea Bering Strait Pacific Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Beaufort Slope ENVELOPE(-145.000,-145.000,71.000,71.000) |
institution |
Open Polar |
collection |
DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
English |
topic |
Joint Program in Applied Ocean Science and Engineering Mechanical Engineering Woods Hole Oceanographic Institution Ocean circulation Ocean-atmosphere interaction |
spellingShingle |
Joint Program in Applied Ocean Science and Engineering Mechanical Engineering Woods Hole Oceanographic Institution Ocean circulation Ocean-atmosphere interaction Brugler, Eric T Interannual variability of the Pacific water boundary current in the Beaufort Sea |
topic_facet |
Joint Program in Applied Ocean Science and Engineering Mechanical Engineering Woods Hole Oceanographic Institution Ocean circulation Ocean-atmosphere interaction |
description |
Thesis: S.M., Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2013. Includes bibliographical references (pages 133-141). Between 2002 and 2011 a single mooring was maintained in the core of the Pacific Water boundary current in the Alaskan Beaufort Sea near 152° W. Using velocity and hydrographic data from six year-long deployments during this time period, we examine the interannual variability of the current. It is found that the volume, heat, and freshwater transport have all decreased drastically over the decade, by more than 80%. The most striking changes have occurred during the summer months. Using a combination of weather station data, atmospheric reanalysis fields, and concurrent shipboard and mooring data from the Chukchi Sea, we investigate the physical drivers responsible for these changes. It is demonstrated that an increase in summertime easterly winds along the Beaufort slope is the primary reason for the drop in transport. The intensification of the local winds has in turn been driven by a strengthening of the summer Beaufort High in conjunction with a deepening of the summer Aleutian Low. Since the fluxes of mass, heat, and freshwater through Bering Strait have increased over the same time period, this raises the question as to the fate of the Pacific water during recent years and its impacts. We present evidence that more heat has been fluxed directly into the interior basin from Barrow Canyon rather than entering the Beaufort shelfbreak jet, and this is responsible for a significant portion of the increased ice melt in the Pacific sector of the Arctic Ocean. by Eric T. Brugler. S.M. |
author2 |
Woods Hole Oceanographic Institution. Joint Program in Applied Ocean Physics and Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering |
format |
Thesis |
author |
Brugler, Eric T |
author_facet |
Brugler, Eric T |
author_sort |
Brugler, Eric T |
title |
Interannual variability of the Pacific water boundary current in the Beaufort Sea |
title_short |
Interannual variability of the Pacific water boundary current in the Beaufort Sea |
title_full |
Interannual variability of the Pacific water boundary current in the Beaufort Sea |
title_fullStr |
Interannual variability of the Pacific water boundary current in the Beaufort Sea |
title_full_unstemmed |
Interannual variability of the Pacific water boundary current in the Beaufort Sea |
title_sort |
interannual variability of the pacific water boundary current in the beaufort sea |
publisher |
Massachusetts Institute of Technology |
publishDate |
2013 |
url |
http://hdl.handle.net/1721.1/85389 |
op_coverage |
r --- |
long_lat |
ENVELOPE(-154.000,-154.000,72.500,72.500) ENVELOPE(-145.000,-145.000,71.000,71.000) |
geographic |
Arctic Arctic Ocean Chukchi Sea Bering Strait Pacific Barrow Canyon Beaufort Slope |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea Bering Strait Pacific Barrow Canyon Beaufort Slope |
genre |
aleutian low Arctic Arctic Ocean Beaufort Sea Bering Strait Chukchi Chukchi Sea |
genre_facet |
aleutian low Arctic Arctic Ocean Beaufort Sea Bering Strait Chukchi Chukchi Sea |
op_relation |
http://hdl.handle.net/1721.1/85389 864393472 |
op_rights |
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 |
_version_ |
1768378758203441152 |