Intrusion of warm Bering/Chukchi waters onto the shelf in the western Beaufort Sea
Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 114 (2009): C00A11, doi:10.1029/2008JC004870. Wind-driven chan...
Published in: | Journal of Geophysical Research |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2009
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/3678 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3678 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3678 2023-05-15T15:39:36+02:00 Intrusion of warm Bering/Chukchi waters onto the shelf in the western Beaufort Sea Okkonen, Stephen R. Ashjian, Carin J. Campbell, Robert G. Maslowski, Wieslaw Clement-Kinney, Jaclyn L. Potter, Rachel 2009-06-27 application/pdf https://hdl.handle.net/1912/3678 en_US eng American Geophysical Union https://doi.org/10.1029/2008JC004870 Journal of Geophysical Research 114 (2009): C00A11 https://hdl.handle.net/1912/3678 doi:10.1029/2008JC004870 Journal of Geophysical Research 114 (2009): C00A11 doi:10.1029/2008JC004870 Beaufort index Article 2009 ftwhoas https://doi.org/10.1029/2008JC004870 2022-05-28T22:58:02Z Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 114 (2009): C00A11, doi:10.1029/2008JC004870. Wind-driven changes in the path of warm Bering/Chukchi waters carried by the Alaska Coastal Current (ACC) through Barrow Canyon during late summer are described from high-resolution hydrography, acoustic Doppler current profiler–measured currents, and satellite-measured sea surface temperature imagery acquired from mid-August to mid-September 2005–2007 near Barrow, Alaska. Numerical simulations are used to provide a multidecadal context for these observational data. Four generalized wind regimes and associated circulation states are identified. When winds are from the east or east-southeast, the ACC jet tends to be relatively strong and flows adjacent to the shelf break along the southern flank of Barrow Canyon. These easterly winds drive inner shelf currents northwestward along the Alaskan Beaufort coast where they oppose significant eastward intrusions of warm water from Barrow Canyon onto the shelf. Because these easterly winds promote sea level set down over the Beaufort shelf and upwelling along the Beaufort slope, the ACC jet necessarily becomes weaker, broader, and displaced seaward from the Beaufort shelf break upon exiting Barrow Canyon. Winds from the northeast promote separation of the ACC from the southern flank of Barrow Canyon and establish an up-canyon current along the southern flank that is fed in part by waters from the western Beaufort shelf. When winds are weak or from the southwest, warm Bering/Chukchi waters from Barrow Canyon intrude onto the western Beaufort shelf. This work was supported in 2005 and 2006 by NSF grants OPP-0436131 and OPP-0436166. In 2007, this work received support through Woods Hole Oceanographic Institution- NOAA Cooperative Institute for Climate and Ocean Research Cooperative Agreement ... Article in Journal/Newspaper Barrow Beaufort Sea Chukchi Alaska Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Beaufort Shelf ENVELOPE(-142.500,-142.500,70.000,70.000) Beaufort Slope ENVELOPE(-145.000,-145.000,71.000,71.000) Journal of Geophysical Research 114 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Beaufort index |
spellingShingle |
Beaufort index Okkonen, Stephen R. Ashjian, Carin J. Campbell, Robert G. Maslowski, Wieslaw Clement-Kinney, Jaclyn L. Potter, Rachel Intrusion of warm Bering/Chukchi waters onto the shelf in the western Beaufort Sea |
topic_facet |
Beaufort index |
description |
Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 114 (2009): C00A11, doi:10.1029/2008JC004870. Wind-driven changes in the path of warm Bering/Chukchi waters carried by the Alaska Coastal Current (ACC) through Barrow Canyon during late summer are described from high-resolution hydrography, acoustic Doppler current profiler–measured currents, and satellite-measured sea surface temperature imagery acquired from mid-August to mid-September 2005–2007 near Barrow, Alaska. Numerical simulations are used to provide a multidecadal context for these observational data. Four generalized wind regimes and associated circulation states are identified. When winds are from the east or east-southeast, the ACC jet tends to be relatively strong and flows adjacent to the shelf break along the southern flank of Barrow Canyon. These easterly winds drive inner shelf currents northwestward along the Alaskan Beaufort coast where they oppose significant eastward intrusions of warm water from Barrow Canyon onto the shelf. Because these easterly winds promote sea level set down over the Beaufort shelf and upwelling along the Beaufort slope, the ACC jet necessarily becomes weaker, broader, and displaced seaward from the Beaufort shelf break upon exiting Barrow Canyon. Winds from the northeast promote separation of the ACC from the southern flank of Barrow Canyon and establish an up-canyon current along the southern flank that is fed in part by waters from the western Beaufort shelf. When winds are weak or from the southwest, warm Bering/Chukchi waters from Barrow Canyon intrude onto the western Beaufort shelf. This work was supported in 2005 and 2006 by NSF grants OPP-0436131 and OPP-0436166. In 2007, this work received support through Woods Hole Oceanographic Institution- NOAA Cooperative Institute for Climate and Ocean Research Cooperative Agreement ... |
format |
Article in Journal/Newspaper |
author |
Okkonen, Stephen R. Ashjian, Carin J. Campbell, Robert G. Maslowski, Wieslaw Clement-Kinney, Jaclyn L. Potter, Rachel |
author_facet |
Okkonen, Stephen R. Ashjian, Carin J. Campbell, Robert G. Maslowski, Wieslaw Clement-Kinney, Jaclyn L. Potter, Rachel |
author_sort |
Okkonen, Stephen R. |
title |
Intrusion of warm Bering/Chukchi waters onto the shelf in the western Beaufort Sea |
title_short |
Intrusion of warm Bering/Chukchi waters onto the shelf in the western Beaufort Sea |
title_full |
Intrusion of warm Bering/Chukchi waters onto the shelf in the western Beaufort Sea |
title_fullStr |
Intrusion of warm Bering/Chukchi waters onto the shelf in the western Beaufort Sea |
title_full_unstemmed |
Intrusion of warm Bering/Chukchi waters onto the shelf in the western Beaufort Sea |
title_sort |
intrusion of warm bering/chukchi waters onto the shelf in the western beaufort sea |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
https://hdl.handle.net/1912/3678 |
long_lat |
ENVELOPE(-154.000,-154.000,72.500,72.500) ENVELOPE(-142.500,-142.500,70.000,70.000) ENVELOPE(-145.000,-145.000,71.000,71.000) |
geographic |
Barrow Canyon Beaufort Shelf Beaufort Slope |
geographic_facet |
Barrow Canyon Beaufort Shelf Beaufort Slope |
genre |
Barrow Beaufort Sea Chukchi Alaska |
genre_facet |
Barrow Beaufort Sea Chukchi Alaska |
op_source |
Journal of Geophysical Research 114 (2009): C00A11 doi:10.1029/2008JC004870 |
op_relation |
https://doi.org/10.1029/2008JC004870 Journal of Geophysical Research 114 (2009): C00A11 https://hdl.handle.net/1912/3678 doi:10.1029/2008JC004870 |
op_doi |
https://doi.org/10.1029/2008JC004870 |
container_title |
Journal of Geophysical Research |
container_volume |
114 |
_version_ |
1766371485133307904 |