The stratification maxima of the seasonally varying Surface layer in the Arctic Ocean’s Beaufort Gyre
Submitted in partial fulfillment of the requirements for the degree of Master of Science at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution September 2021. The Beaufort Gyre region of the Arctic Ocean is strongly stratified at the base of the wintertime mixed l...
Main Author: | |
---|---|
Other Authors: | |
Format: | Thesis |
Language: | English |
Published: |
Massachusetts Institute of Technology and Woods Hole Oceanographic Institution
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/27522 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/27522 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/27522 2023-05-15T14:59:54+02:00 The stratification maxima of the seasonally varying Surface layer in the Arctic Ocean’s Beaufort Gyre Roemer, Peter A. Cole, Sylvia T. 2021-09 https://hdl.handle.net/1912/27522 en_US eng Massachusetts Institute of Technology and Woods Hole Oceanographic Institution WHOI Theses https://hdl.handle.net/1912/27522 doi:10.1575/1912/27522 doi:10.1575/1912/27522 Beaufort Gyre Stratification Remnant layer Thesis 2021 ftwhoas https://doi.org/10.1575/1912/27522 2022-10-22T22:57:11Z Submitted in partial fulfillment of the requirements for the degree of Master of Science at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution September 2021. The Beaufort Gyre region of the Arctic Ocean is strongly stratified at the base of the wintertime mixed layer, which impedes the vertical transport of heat, energy, and other tracers. Ice-Tethered Profiler observations during 2004-2018 were used to characterize and investigate the seasonal and interannual variability of the strength, depth, density, and thickness of this highly stratified layer at the base of the mixed layer. This includes investigating the remnant stratification maximum, which formed when the summer mixed layer shoaled. Seasonally, the stratification maximum was never in a steady state. It was largest in October (4.8 × 10−3 rad2/sec2) and decreased during all winter months (to 2.3 × 10−3rad2/sec2 in June), indicating that surface forcing and interior vertical mixing were never in equilibrium during the year. Interannually, the period from 2011-2018 had a higher stratification maximum than then the period from 2005-2010 regardless of the season. The remnant stratification maximum was consistently weaker than the winter stratification maximum from which it formed. The initial evolution of the remnant stratification maximum is used to estimate an effective vertical diffusivity of order 10−6m2/s. No significant geographic variability was found, in part due to high temporal and small scale variability of the stratification maximum layer. Implications for heat transport through to the sea ice cover are discussed. Thesis Arctic Arctic Ocean Sea ice Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Arctic Ocean |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Beaufort Gyre Stratification Remnant layer |
spellingShingle |
Beaufort Gyre Stratification Remnant layer Roemer, Peter A. The stratification maxima of the seasonally varying Surface layer in the Arctic Ocean’s Beaufort Gyre |
topic_facet |
Beaufort Gyre Stratification Remnant layer |
description |
Submitted in partial fulfillment of the requirements for the degree of Master of Science at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution September 2021. The Beaufort Gyre region of the Arctic Ocean is strongly stratified at the base of the wintertime mixed layer, which impedes the vertical transport of heat, energy, and other tracers. Ice-Tethered Profiler observations during 2004-2018 were used to characterize and investigate the seasonal and interannual variability of the strength, depth, density, and thickness of this highly stratified layer at the base of the mixed layer. This includes investigating the remnant stratification maximum, which formed when the summer mixed layer shoaled. Seasonally, the stratification maximum was never in a steady state. It was largest in October (4.8 × 10−3 rad2/sec2) and decreased during all winter months (to 2.3 × 10−3rad2/sec2 in June), indicating that surface forcing and interior vertical mixing were never in equilibrium during the year. Interannually, the period from 2011-2018 had a higher stratification maximum than then the period from 2005-2010 regardless of the season. The remnant stratification maximum was consistently weaker than the winter stratification maximum from which it formed. The initial evolution of the remnant stratification maximum is used to estimate an effective vertical diffusivity of order 10−6m2/s. No significant geographic variability was found, in part due to high temporal and small scale variability of the stratification maximum layer. Implications for heat transport through to the sea ice cover are discussed. |
author2 |
Cole, Sylvia T. |
format |
Thesis |
author |
Roemer, Peter A. |
author_facet |
Roemer, Peter A. |
author_sort |
Roemer, Peter A. |
title |
The stratification maxima of the seasonally varying Surface layer in the Arctic Ocean’s Beaufort Gyre |
title_short |
The stratification maxima of the seasonally varying Surface layer in the Arctic Ocean’s Beaufort Gyre |
title_full |
The stratification maxima of the seasonally varying Surface layer in the Arctic Ocean’s Beaufort Gyre |
title_fullStr |
The stratification maxima of the seasonally varying Surface layer in the Arctic Ocean’s Beaufort Gyre |
title_full_unstemmed |
The stratification maxima of the seasonally varying Surface layer in the Arctic Ocean’s Beaufort Gyre |
title_sort |
stratification maxima of the seasonally varying surface layer in the arctic ocean’s beaufort gyre |
publisher |
Massachusetts Institute of Technology and Woods Hole Oceanographic Institution |
publishDate |
2021 |
url |
https://hdl.handle.net/1912/27522 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
doi:10.1575/1912/27522 |
op_relation |
WHOI Theses https://hdl.handle.net/1912/27522 doi:10.1575/1912/27522 |
op_doi |
https://doi.org/10.1575/1912/27522 |
_version_ |
1766332026368032768 |