Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean
Thesis (Ph. D. in Physical Oceanography)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2013. Cataloged from PDF version of thesis. Includes bibliographical refer...
Main Author: | |
---|---|
Other Authors: | , , , , |
Format: | Thesis |
Language: | English |
Published: |
Massachusetts Institute of Technology
2013
|
Subjects: | |
Online Access: | http://hdl.handle.net/1721.1/79295 |
id |
ftmit:oai:dspace.mit.edu:1721.1/79295 |
---|---|
record_format |
openpolar |
spelling |
ftmit:oai:dspace.mit.edu:1721.1/79295 2023-06-11T04:07:54+02:00 Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean Von Appen, Wilken-Jon Robert S. Pickart. Woods Hole Oceanographic Institution. Joint Program in Physical Oceanography Woods Hole Oceanographic Institution Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences r --- 2013 275 p. application/pdf http://hdl.handle.net/1721.1/79295 eng eng Massachusetts Institute of Technology http://hdl.handle.net/1721.1/79295 847517836 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 Physical Oceanography Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution Thesis 2013 ftmit 2023-05-29T08:26:50Z Thesis (Ph. D. in Physical Oceanography)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2013. Cataloged from PDF version of thesis. Includes bibliographical references (p. 259-275). Two high-resolution mooring arrays extending from the outer shelf to the mid continental slope are used to elucidate shelf-basin exchange at the inflow to and the outflow from the Arctic Ocean. Pacific Water entering the Arctic Ocean forms the Western Arctic shelfbreak current along the Beaufort Sea slope. Data from the mooring array at 152°W-approximately 150 km east of Pt. Barrow, AK-reveals that this current has two distinct states in summer depending on the water mass it transports. When advecting Alaskan Coastal Water it is surface-intensified and both baroclinically and barotropically unstable. This configuration lasts about a month with an average transport of 0.7 Sv. When advecting Chukchi Summer Water the current is bottom-intensified and is only baroclinically unstable. This state also exists for approximately a month with an average transport of 0.6 Sv. The strong mean-to-eddy energy conversion causes both configurations of the current to spin down over a distance of a few hundred kilometers, suggesting that warm Pacific Water does not enter the Canadian Arctic Archipelago via this route. Dense water formed in the Nordic Seas overflows the Denmark Strait and undergoes vortex stretching, forming intense cyclones that propagate along the East Greenland slope. Data from the mooring array at 65°N-roughly 300 km downstream of Denmark Strait-was used to determine the full water column structure of the cyclones. On average a cyclone passes the array every other day in the vicinity of the 900 m isobath, although the depth range of individual cyclones ranges between the 500 m and 1600 m isobaths. The cyclones self-propagate at 0.45 m/s and are also advected by the mean flow of 0.27 m/s, ... Thesis Arctic Archipelago Arctic Arctic Ocean Beaufort Sea Canadian Arctic Archipelago Chukchi Denmark Strait East Greenland Greenland Nordic Seas DSpace@MIT (Massachusetts Institute of Technology) Arctic Arctic Ocean Canadian Arctic Archipelago Greenland Pacific |
institution |
Open Polar |
collection |
DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
English |
topic |
Joint Program in Physical Oceanography Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution |
spellingShingle |
Joint Program in Physical Oceanography Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution Von Appen, Wilken-Jon Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean |
topic_facet |
Joint Program in Physical Oceanography Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution |
description |
Thesis (Ph. D. in Physical Oceanography)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2013. Cataloged from PDF version of thesis. Includes bibliographical references (p. 259-275). Two high-resolution mooring arrays extending from the outer shelf to the mid continental slope are used to elucidate shelf-basin exchange at the inflow to and the outflow from the Arctic Ocean. Pacific Water entering the Arctic Ocean forms the Western Arctic shelfbreak current along the Beaufort Sea slope. Data from the mooring array at 152°W-approximately 150 km east of Pt. Barrow, AK-reveals that this current has two distinct states in summer depending on the water mass it transports. When advecting Alaskan Coastal Water it is surface-intensified and both baroclinically and barotropically unstable. This configuration lasts about a month with an average transport of 0.7 Sv. When advecting Chukchi Summer Water the current is bottom-intensified and is only baroclinically unstable. This state also exists for approximately a month with an average transport of 0.6 Sv. The strong mean-to-eddy energy conversion causes both configurations of the current to spin down over a distance of a few hundred kilometers, suggesting that warm Pacific Water does not enter the Canadian Arctic Archipelago via this route. Dense water formed in the Nordic Seas overflows the Denmark Strait and undergoes vortex stretching, forming intense cyclones that propagate along the East Greenland slope. Data from the mooring array at 65°N-roughly 300 km downstream of Denmark Strait-was used to determine the full water column structure of the cyclones. On average a cyclone passes the array every other day in the vicinity of the 900 m isobath, although the depth range of individual cyclones ranges between the 500 m and 1600 m isobaths. The cyclones self-propagate at 0.45 m/s and are also advected by the mean flow of 0.27 m/s, ... |
author2 |
Robert S. Pickart. Woods Hole Oceanographic Institution. Joint Program in Physical Oceanography Woods Hole Oceanographic Institution Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
format |
Thesis |
author |
Von Appen, Wilken-Jon |
author_facet |
Von Appen, Wilken-Jon |
author_sort |
Von Appen, Wilken-Jon |
title |
Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean |
title_short |
Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean |
title_full |
Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean |
title_fullStr |
Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean |
title_full_unstemmed |
Moored observations of shelfbreak processes at the inflow to and outflow from the Arctic Ocean |
title_sort |
moored observations of shelfbreak processes at the inflow to and outflow from the arctic ocean |
publisher |
Massachusetts Institute of Technology |
publishDate |
2013 |
url |
http://hdl.handle.net/1721.1/79295 |
op_coverage |
r --- |
geographic |
Arctic Arctic Ocean Canadian Arctic Archipelago Greenland Pacific |
geographic_facet |
Arctic Arctic Ocean Canadian Arctic Archipelago Greenland Pacific |
genre |
Arctic Archipelago Arctic Arctic Ocean Beaufort Sea Canadian Arctic Archipelago Chukchi Denmark Strait East Greenland Greenland Nordic Seas |
genre_facet |
Arctic Archipelago Arctic Arctic Ocean Beaufort Sea Canadian Arctic Archipelago Chukchi Denmark Strait East Greenland Greenland Nordic Seas |
op_relation |
http://hdl.handle.net/1721.1/79295 847517836 |
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_ |
1768381017960218624 |