Accession Number : AD0261216

Title :   SURVEY OF ATMOSPHERIC STABILITY CONDITIONS RELATIVE TO DIFFUSION OF AIRBORNE MATERIAL OVER POLAR AREAS AND GLACIER SURFACES

Corporate Author : STANFORD UNIV CALIF AEROSOL LAB

Personal Author(s) : PROPHET,DAVID T.

Report Date : JUL 1961

Pagination or Media Count : 1

Abstract : Meteorological information and data relative to the probable travel behavior of airborne material over Polar and glacier regions are reviewed. The vertical stability is classified into four main types depending upon the structure of the vertical temperature gradient. It is shown that the frequency of occurrence of each stability type varies with the seasons and is primarily a function of radiation balance at the surface, the heat exchange between the surface and the air above, and the temperature at the surface relative to 32 F. During winter, the vertical temperature structure over both Polar Regions is very similar by virtue of the intense radiational cooling at the surface. However in summer, the vertical temperature structure over the Arctic is found to be quite different from that over the Antarctic. The reason for this difference is explained in terms of dipend upon the temperature of the air traversing the glacier relative to 32 F. The analysis indicates that conditions during summer days over glaciers at the lower elevations in the Northern Hemisphere are not typical of either Polar Region. (Author)

Descriptors :   *AEROSOLS, *ATMOSPHERES, *DIFFUSION, *METEOROLOGY, AIRBORNE, GLACIERS, HEAT TRANSFER, ICE, PERMAFROST, POLAR REGIONS, SNOW, STABILITY, SURFACE PROPERTIES, TEMPERATURE, TERRAIN, TRANSPORT PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE