A Statistical Study on the Relation between Cloud Amount and Supply from the Japan Sea Surface in January

Abstract

Basing on ship observations over the Japan Sea area, the relations are investigated statistically between cloud amount and heat or moisture supply estimated by the bulk method for the January situation of the 5 year period 1963-1967. A significant positive correlation is found particularly over the central part of the Japan Sea area where cumulus clouds start to form and develop. The relation seems to be clear under a north to northwesterly monsoon situation.