Great Drought in Summer, 1939

[摘要] In summer 1939, Southern part of Tyosen and Western and Central parts of Japan experienced a great drought which is one of the heaviest ever recorded since the routine of meteorological services was established in this country. The present note explains the main results of the investigation on this drought. carried out by the staff of Central Meteorological Observatory of Japan. The details will appear in the Report of the Observatory. It is shown that the direct cause of this drought was the persistence of high pressure belt over Japan and her neighbourhood, which hindered the visit of depressions to the drought regions. Here is also shown the effect of relatively low surface temperature and small temperature gradient over Western North Pacific on the persistence of the pressure anomaly. Some considerations on sunspots relation were also alluded.

[学科分类] 大气科学