JOUKKAL OF THE COLLECrE OF SCIENCE, TOKYO IJirERTAL UKIVEKSITV. 



VOL. XXXVII., ARTICLE 4. 



On the Distribution of Cyclonic Precipitation in Japan. 



(Contribution I. from the Geophysical Seminary in the 

 Physical Institute, College of Science). 



By 



Torahiko TERADA, 



UifldlnilinhiisJii, 



Takezo YoKOTA, -, Sy6hu OTUKI. 



,,. , , . unci ^ 



The distribution of cyclonic precipitations has been investi- 

 gated by many meteorologists for different localities. H. Hilde- 

 brandsson^"^ found that in Upsala, the precipitation is most abundant 

 on the W side of a depression. Akerbiom"^ found the heaviest rain- 

 fall in Thorshavn on the front right quadrant of a centre, whereas 

 in Vienna it was on the opposite side. Since these classical investiga- 

 tions, it seems to have been a favourite problem to inquire on which 

 side of a depression the precipitation is most frequent or al)undant. 

 Krankenhagen^'^ found greatest precipitation in Swinemünde on 

 the rear side of a cyclone and attributed the fact to the influence 

 of seawind prevailing on that side. V. Drapczyanski'*'^ came to the 

 conclusion that the precipitation in 8t. Louis, U.S.A., is most 

 frequent on the rear side, l)ut the average amount of rain on rain- 

 days most abundant on the S side. H. R. ^lilP^ investigated the 

 trace or " smear " swept by the rain area accompanying a number 

 of remarkable depressions passing over Great Britain, and came to 

 the result tliat " the belt of cyclonic rains is much wider on the left 



1.) H. Hildebrandsson, Sur la distribution des éléments met. autour des minima ft des 

 maxima barométriques, Upsala 1S83 ; v. Bebber, Met. ZS., 18S4. 



2.) Ph. Alcorblom, Sur la distribution à Vienne et à Thorshavn des éléments etc. 



3.) Krankenhagen, Met. ZS. 1885. See also Polis, Met, ZS., 1904. 



4.) Drapczyanski, Met. ZS. 1903. 



5.) H. E. Mill, Sjmon's Met. May. 39, 1904 ; Quart. Jouru. E. Met. Soc. 36, 1908. 



