Accession Number : AD0765722

Title :   Solar Activity and the Weather,

Corporate Author : STANFORD UNIV CALIF INST FOR PLASMA RESEARCH

Personal Author(s) : Svalgaard,Leif

Report Date : JUN 1973

Pagination or Media Count : 26

Abstract : Some new evidence that the weather is influenced by solar activity is reviewed. It appears that the solar magnetic sector structure is related to the circulation of the earth's atmosphere during local winter. About 3 1/2 days after the passage of a sector boundary the maximum effect is seen; apparently the height of all pressure surfaces increases in high latitudes leading to anticyclogenesis, whereas at midlatitudes the height of the pressure surfaces decreases leading to low pressure systems or to deepening of existing systems. This later effect is clearly seen as an increase in the area of the base of air with absolute vorticity exceeding a given threshold. Since the increase of geomagnetic activity generally is small at a sector boundary it is speculated that geomagnetic activity as such is not the cause of the response to the sector structure but that both weather and geomagnetic activity are influenced by the same (unknown) mechanism. (Author)

Descriptors :   (*WEATHER, *SOLAR DISTURBANCES), ATMOSPHERIC MOTION, VORTICES, CORRELATION TECHNIQUES, SOLAR WIND, MAGNETIC STORMS, SOLAR FLARES, SUNSPOTS

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE