On the Effect of Topo<^raphy on the Precipitation in Japan. \'\_ 



Akita. Kanazawa, Miyako and Tyusi for Nortlierii Japan 

 MI. 



Niigata, Sakai, Tyosi and Koti for Middle Japan III-IV, 



Sakai. Hukuoka, Wakayania and Miyazaki for Bonthern 

 Japan V-\'I. 



The difference of the means, Japan Sea pair minus the Pacific, 

 reduced to the gradient corresponding to 111 km. distance was 

 taken as the :i:-c«)mponent. For the 7/-c(»mponent, the difference 

 was taken between the mean vahie on tlie opposite sides of the 

 rectangle running transverse to the axis of the land, the positive 

 sign ce)rresponding to the case when the SW side is higher than 

 the NE side. The mean distance between the opposite side was 

 roughly estimated on a map, scale 1 :1(),000,000. 



Thus the component gradients :i-i, y/i, a-2 2/2, a's .'/s, for the three 



regions I-II, III-IV, V-VI, I'espectivelv were obtained according 



to the following schema: 



/Akita 4- Kanazawa Mivako + Tvosi \ r. 00/. 

 ^^ = ( 2 — " 2-^ )^^-^^^ 



/ Kanazawa + Ty ôsi Akita + Mivako \ r. oao 

 y-i^ 2 ~ 2~^ jxO.248 



_ / Niigata + Sakai Ty ôsi + Kôti \ ^ Aor 

 x-2-y ^ ^ jxu.^ôo 



( Sakai + Kôti Niigata + Tvôsi \ n^,-t^ 

 2 2 • ) ^^-^^^ 



(Sakai + Hukuoka Wakayama + Miyazaki \ ^ ,,.,, 

 —2 2 jxu.4bd 



(Hukuoka + Miyazaki Sakai + Wakayama \ n oc 7 

 2 2 '~ )^ 



It must be remarked that in the case of Xi 2/1, the two 

 components are not even nearly rectangular, so that this point 

 must be remembered Avhen a quantitative relation is concerned. 

 But for the most purpose in the present investigation, the general 

 qualitative relations are not seriously modified by treating the 

 components as rectangular. The values of the components thus 

 obtained aie contained in Table V. 



