Accession Number : AD0685764

Title :   IDEAS ON FEASIBILITY OF SEASONAL CLIMATIC FORECASTING IN SOUTHEAST ASIA.

Descriptive Note : Final rept. 1 Jan 68-31 Jan 69,

Corporate Author : CALIFORNIA UNIV LOS ANGELES

Personal Author(s) : Bjerknes,Jacob A. B.

Report Date : 04 FEB 1969

Pagination or Media Count : 42

Abstract : Sir Gilbert Walker's index of the 'Southern Oscillation' shows interseasonal lag correlations with highest values in the northern autumn, indicating that a moderately successful forecasting of the SE Asia winter monsoon rainfall may be within reach. To Walker's discovery of a standing oscillation along the equator with a node at 165 degrees E can now be added a thermally direct 'Walker Circulation' connecting the cool air of the eastern equatorial Pacific with the air over the warmer West Pacific and Indonesian waters. The intensity of the time-averaged Walker Circulation depends essentially on the amount of cold upwelling water brought to the surface during the last season of maximum Pacific equatorial easterlies (southern hemisphere late winter), and the ocean-stored 'memory' of this process accounts for the selective inter-seasonal persistence of tropical climatic anomalies discovered by Walker. (Author)

Descriptors :   (*CLIMATE, SOUTHEAST ASIA), (*WEATHER FORECASTING, FEASIBILITY STUDIES), PERIODIC VARIATIONS, RAINFALL, AIR MASS ANALYSIS, OSCILLATION, INTENSITY, MARINE METEOROLOGY, INTERACTIONS, COMPUTERS, WEATHER FORECASTING, BAROMETRIC PRESSURE, METEOROLOGICAL CHARTS, VIETNAM

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE