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Wind, Sea Ice, Inertial Oscillations and Upper Ocean Mixing in Marguerite Bay, Western Antarctic Peninsula: Observations and Modeling.

ADA470224

Publication Date	2006
Personal Author	Hyatt, J.
Page Count	171
Abstract	Two years of moored oceanographic and automatic weather station data which span the winter ice seasons of 2001-2003 within Marguerite Bay on the western Antarctic Peninsula (WAP) shelf were collected as part of the Southern Ocean Global Ocean Ecosystems Dynamics program. In order to characterize the ice environment in the region, a novel methodology is developed for determining ice coverage, draft and velocity from moored upward-looking acoustic Doppler current profiler data. A linear momentum balance shows the importance of internal ice stresses in the observed motion of the ice pack. Strong inertial, not tidal, motions were observed in both the sea ice and upper ocean. Estimates of upward diapycnal fluxes of heat and salt from the Upper Circumpolar Deep Water to the surface mixed layer indicate almost no contribution from double diffusive convection. A one-dimensional vertical mixed layer model adapted for investigation of mixing beneath an ice-covered ocean indicates that the initial wind event, rather than subsequent inertial shear, causes the majority of the mixing. This work points towards episodic wind-forced shear at the base of the mixed layer coupled with static instability from brine rejection due to ice production as a major factor in mixing on the WAP shelf.
Keywords	Wind Oceans Antarctic regions Sea ice Shear properties Stresses Ice formation Winter Brines Peninsulas Pack ice Static stability Seasons Inertial systems Heat flux Balance Ice Surfaces Environments Ocean surface Marguerite bay(Antarctica)
Source Agency	Non Paid ADAS
Corporate Authors	Woods Hole Oceanographic Institution, MA.
Supplemental Notes	The original document contains color images.
Document Type	Thesis
Title Note	Doctoral thesis.
NTIS Issue Number	200724

Wind, Sea Ice, Inertial Oscillations and Upper Ocean Mixing in Marguerite Bay, Western Antarctic Peninsula: Observations and Modeling.

Wind, Sea Ice, Inertial Oscillations and Upper Ocean Mixing in Marguerite Bay, Western Antarctic Peninsula: Observations and Modeling.
ADA470224

Publication Date	2006
Personal Author	Hyatt, J.
Page Count	171
Abstract	Two years of moored oceanographic and automatic weather station data which span the winter ice seasons of 2001-2003 within Marguerite Bay on the western Antarctic Peninsula (WAP) shelf were collected as part of the Southern Ocean Global Ocean Ecosystems Dynamics program. In order to characterize the ice environment in the region, a novel methodology is developed for determining ice coverage, draft and velocity from moored upward-looking acoustic Doppler current profiler data. A linear momentum balance shows the importance of internal ice stresses in the observed motion of the ice pack. Strong inertial, not tidal, motions were observed in both the sea ice and upper ocean. Estimates of upward diapycnal fluxes of heat and salt from the Upper Circumpolar Deep Water to the surface mixed layer indicate almost no contribution from double diffusive convection. A one-dimensional vertical mixed layer model adapted for investigation of mixing beneath an ice-covered ocean indicates that the initial wind event, rather than subsequent inertial shear, causes the majority of the mixing. This work points towards episodic wind-forced shear at the base of the mixed layer coupled with static instability from brine rejection due to ice production as a major factor in mixing on the WAP shelf.
Keywords	Wind Oceans Antarctic regions Sea ice Shear properties Stresses Ice formation Winter Brines Peninsulas Pack ice Static stability Seasons Inertial systems Heat flux Balance Ice Surfaces Environments Ocean surface Marguerite bay(Antarctica)
Source Agency	Non Paid ADAS
Corporate Authors	Woods Hole Oceanographic Institution, MA.
Supplemental Notes	The original document contains color images.
Document Type	Thesis
Title Note	Doctoral thesis.
NTIS Issue Number	200724