Tim Stanton and Weislaw Maslowoski Collaborative Research: The Role of Ice-Ocean Exchange in Ice-Albedo Feedback. Timothy P. Stanton , Department of Oceanography, Naval Postgraduate School Monterey, CA 93943, Stanton@nps.navy.mil, (831) 656-3144, Fax: (831) 656-2712 - I have continued to organize and edit the SHEBA CTD timeseries data, and transferred the full, 12350 profile (T,S, s q )(t,z) timeseries to the CODIAC data base in October 2000. - An analysis of the ice-camp drift upper ocean T/S structure and heat content has been submitted for publication in JGR. This paper shows that the upper pycnoline heat content was significantly higher than sparse historical observations, particularly over the flanks of the Chukchi Cap. The available heat through even modest storm-forced mixed layer entrainment resulted in observed heat fluxes in excess of 100 Wm during March 1998, causing significant early season ice melt at the camp. Wm , although the instrusions provided a robust mechanism for lateral heat transport away from mixing regions near abrupt topography (Lamb, 2000). - I am developing a new estimator for c , the thermal variance dissipation rate, which is robust to the presence of strong, inactive interleaved T/S layers. This technique exploits the dual, spatially lagged micro thermistor sensors used on the automated profiling CTD/microstructure package, allowing the spectral signatures of fine-scale layering to be distinguished from active turbulent patches. The resulting turbulent heat flux estimates have significantly lower noise, and therefore more accurate estimates of vertical heat fluxes. | |
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