Southward Propagation of Pressure waves on the Hemispheric-Scale

[摘要] Experience revealed the existence of the tendency for high pressures at high latitudes to propagate southward, causing colder weather in central Japan about 3 pentads later.In this report, the relation between the pressure wave and the temperature change in the middle part of Japan is studied statistically and synoptically, using 5-day mean northern hemispherical sea-level and 500mb pressure anomaly data as the basic materials.In the result, the reality of such pressure wave is confirmed, its propagation process at upper level being recognized to be different from that at sea level. The utility of the empirical rule for forecasting the temperature (in central Japan) by attending to the high pressure at high latitudes is also confirmed.

[学科分类] 大气科学