Desarrollo de la Antártica

EL DESARROLLO DE LA ANTÁRTICl\. coordination and liaison with related projects in the U.S. and abroad Scientists from several U.S. and foreign institutions participate in the studies. So far the following countries either have participated or plan to participate in the work: Argentina, Australia, Chile, Denmark, Federal Republic of Germany, France, New Zealand, Nor– way, South Africa, UnÍted Kingdom, USSR, and the USA. Objectives The program is desi,gned to improve our understanding of tihe Antarctic Circumpolar Current (ACC) by: 1) identifyin¡g the statistical properties and space and time scales of variability selected regions; 2) developing and testing theories of dynamical balance, mixing and exchange with other oceans; 3) developing a basis for understanding the role of the large scale circulatíon and air-sea interaction in the lSouthern Ocean in global climate dynamic; 4) developing an understandíng of polar frontal zone dynamics and their relationship to the ACC; and, 5) developing an understanding of the methods of water mass formation and mixing. In order to attain these goals a sequence of monitoring and dy– namic field experiments ihave been initiated. Long term monitoring of large scale features of the dynamics in Drake Passage were begun in tihe 1974-75 austral Summer. Field studies of the polar frontal zone and of winter oceanographic conditions beneath the sea ice ihave also been inithted. In addition, analysis of previously existing data sets is being undertaken and laboratory and numerical studies are undel1Way. FIELID PROGRAMS Two ISOS field measurement programs were carried out in 1974-75: 1) a pilot program for obtaining oceanographic data under the Ant– arctic sea ice during winter; and 2) FDRAKE. Wi,nter Unde,'-Ice Pilot Program This was a pilot program to develop the techniques necessary for long-term monitoring of physical oceanographic processes undel' the sea ice. High resolution vertical profiles of temperatul'e, salinity (conductivity) and currents were planned in McMurdo Sound during the austral winter. The long range goal of tlbis program was to study the processes responsible fOI the formation of Antarctic Bottom Water. Principal investigators were Dr. Henry Crew and Dr. 3 08