Yuichi WATANABE
A Study of Temperature Dependency on Snowfall Estimated by Snow-Depth Observation Using AMeDAS in Niigata Prefecture
Toshiro KUMAKURA
It has not been enough to study relationship between snowfall events and air temperature on their events because we do not have simple measuring method to distinguish snowfall from rainfall.
On this study, we use the snow-depth data from AMeDAS which covers wide area and observes in high horizontal resolution, to estimate the air temperature dependency on snowfall.
We found that the calculated dependency on high temperature greater than 1¡î is not so good but the dependency less than 1¡î seems to be a little similar to the direct snowfall observation using special rain gauge. And we also found that the snow densification played an important role in the distinguishability on this study. For example, though the mean ratio of the snowfall events against the 0.67, the ratio is 0.58 in Tsunan which has deep snow-pack every year and 20 year-mean yearly maximum snow-depth 270cm.
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