On the Precipitation Intensity at Syowa Station, Antarctica

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Precipitation intensities of snow crystals grown from sublimation and condensation processes in the free atmosphere at Syowa Station, Antarctica (69°00′S, 39°35′E) were calculated by using the data of 550 glass slides in 1968 and 300 glass slides in 1969 obtained with the replica solution method. The peak value of the maximum precipitation intensity was 1.5mm・hr^<-1> in 1968 and 7.2mm・hr^<-1> in 1969. Therefore, the maximum precipitation intensity ranged from (10)^<-2> to (10)^0mm・hr^<-1>, and the peak values of the intensity ranged from (10)^0 to (10)^1mm・hr^<-1>. Next, the peak values of the maximum precipitation intensities at Syowa Station, Inuvik (68°22′N, 133°42′W), N. W. T., Canada in December 1979 (midwinter), and South Pole Station (90°S) in January 1975 (austral midsummer) and in November 1978 (end of winter) were compared. The order of the maximum precipitation intensity at Syowa Station, Inuvik, and South Pole Station was regarded as (10)^1,(10)^0,and (10)^<-1>mm・hr^<-1>, respectively. Further, using the average maximum precipitation intensity and the duration of precipitation at Syowa Station, the annual amount of precipitation by snowfalls and snow storms except drifting and blowing snow was estimated and an approximate value of 430mm was obtained.
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