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 2010-06-18T19:42:02Z 2010-06-18T19:42:02Z 2009-06-27
dc.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. en_US
dc.description.abstract 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. en_US
dc.description.sponsorship 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 NA17RJ1223 and University of Alaska Fairbanks-NOAA Cooperative Institute for Arctic Research Cooperative Agreement NA17RJ1224. Additional support was provided by the James M. and Ruth P. Clark Arctic Research Initiative Fund at the Woods Hole Oceanographic Institution. en_US
dc.format.mimetype application/pdf
dc.identifier.citation Journal of Geophysical Research 114 (2009): C00A11 en_US
dc.identifier.doi 10.1029/2008JC004870
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.subject Beaufort index en_US
dc.title Intrusion of warm Bering/Chukchi waters onto the shelf in the western Beaufort Sea en_US
dc.type Article en_US
dspace.entity.type Publication
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