Snowgage of high catching rate
スポンサーリンク
概要
- 論文の詳細を見る
The catching characteristics of conventional snow gages are quite unsatisfactory.<BR>Yoshida and Saito observed the catching rate <I>C</I> of various snow gages and found that C was given by the following empirical formula, <BR><I>C</I>=1/(1+<I>mv</I>)<BR>where <I>v</I> is the wind velocity in m/s near the gages orifice and <I>m</I> is the constant for certain snow gage. For J.M. A. standard 20-cm standpipe snowgage m was 0.449.<BR>In order to secure high catching rate, it is neccesary to undisturb the air current above the orifice.<BR>The authers designed a snowgage which had the funnel-shaped head connected to an U-tube. The funnel and it's side of the U-tube is filled with kerosene and the other side is filled with water. The whole system is heated to a certain temperature above 0°C. When the snowflakes enter in the oil, they melt and fall down as waterdrops into this U-tube, and the same mass of water of these drops must overflow from the opening of the water side of the U-tube. The overflown water is measured by the jar for raingage.<BR>From the analysis of the results of field tests, the catching rate of this snowgage is presumed to be shown by the following formula.<BR><I>C</I>=1/(1+0.24<I>v</I>)
- 社団法人 日本雪氷学会の論文