The Antarctic Zone Flux Experiment
MetadataShow full item record
In winter the eastern Weddell Sea in the Atlantic sector of the Southern Ocean hosts some of the most dynamic air-ice-sea interactions found on earth. Sea ice in the region is kept relatively thin by heat flux from below, maintained by upper-ocean stirring associated with the passage of intense, fast-moving cyclones. Ocean stratification is so weak that the possibility of deep convection exists, and indeed, satellite imagery from the Weddell Sea in the 1970s shows a large expanse of open water (the Weddell Polynya) that persisted through several seasons and may have significantly altered global deep-water production. Understanding what environmental conditions could again trigger widespread oceanic overturn may thus be an important key in determining the role of high latitudes in deep-ocean ventilation and global atmospheric warming. During the Antarctic Zone Flux Experiment in July and August 1994, response of the upper ocean and its ice cover to a series of storms was measured at two drifting stations supported by the National Science Foundation research icebreaker Nathaniel B. Palmer. This article describes the experiment, in which fluxes of heat, mass, and momentum were measured in the upper ocean, sea ice, and lower-atmospheric boundary layer. Initial results illustrate the importance of oceanic heat flux at the ice undersurface for determining the character of the sea ice cover. They also show how the heat flux depends both on high levels of turbulent mixing during intermittent storm events and on large variability in the stratified upper ocean below the mixed layer. 39 refs., 8 figs.
The article of record as published may be found at https://doi.org/10.1175/1520-0477(1996)077<1221:TAZFE>2.0.CO;2
Showing items related by title, author, creator and subject.
Sherif Michael; Sommers, R.S. (1988-09);An approach to extend the life of orbiting satellites is presented. Since output power of spacecraft solar panels plays a major role in determining the end of life of the satellite, any attempt to recover any of this lost ...
Bedard, Raynald (Monterey, California: U.S. Naval Postgraduate School, 1987);a method for determining the free-field open circuit voltage sensitivity of a reversible underwater electroacoustic transducer from the difference in its input electrical impedance when loaded by water and air was investigated ...
Hooper, Posey Alexander; Motter, George Oscar (Annapolis, Maryland. U.S. Naval Postgraduate School, 1949);The U.S. Naval Engineering Experiment Station, Annapolis, Maryland, is at present conducting tests on water lubricated bearings. High pressures, high water temperatures, high angular speeds, and fine clearances are involved ...