148 ART. 2.— B. KOTÔ: 



April and May, and below in July. Temperature seems to have *^^^^^"^^" 

 no great influence on the " sea " fog, though ^Yith the "inland " 

 fog as in Hokkaido (Japan), the difference in air temperature near 

 the ground seems to be the factor essential to its generation ; the 

 lower temperature of the air in direct contact with the cool 

 ground causes in the aii' weak currents which facilitate conden- '^^^ ^^'"^^ 

 sation in the immediately overlying stratum. In short, the 

 Chy'ôl'la-Do fog makes its appearance when the wind changes in 

 direction under a slightly low pressure. 



In connection with these remarks on the climate of Chyöl- 

 Met™ la-Do, let me give the following general results '^ of a j^ear's 

 observations taken at 3Iok-pho where a meteorological station was 

 established in 1904. 



1) The Annual mean tempeeatuee of the ate' is 13.1° C, which 

 is equal to that of our Noto peninsula, though Chyöl-la-Do is in 

 the same latitude as Kobe (12.6° C). The mean temperature of 

 the three summer months is 22.7°, wdiicli is lower than that of 

 Noto, but that of the three winter months (4.3 ) is higher than 

 that of Tokyo. In short, Mok-pho enjoys a comparatively uniform 

 and mild climate. 



2) Peessüee and wind. — The air pressure daring the winter 

 months (7G7 vmi on the average) is high as compared with 

 Japan, but during the summer the mean is 750 mm, which 

 is considerably lower, being nearly equal to that of the Riû-kiîi 

 islands ; the reason being that during the cold months the pro- 

 vince is near the high pressure centre of the continent, while in 

 Slimmer it lies near the low pressure centre of the Pacific. North 

 winds therefore prevail from September to March, and south- 



1) T. Noda : " The Climate of the South-west Coast o£ Korea." Jour, Metew. Snc 

 Japan. Tokyo, No. 4, 1905, p. 78. 



