EVALUATION OF SNOW CONDITION IN ABUKUMA BASIN USING STABLE ISOTOPE RATIO

Abstract

 We tried an analysis about the snow condition in Agano basin using stable isotope ratio. This result was compared annual Seasonal Snow depth Index(SSDI). As results, The snow feature distribution was obtained depend on regional scale. Dtail resuts are as follows: ①Difference of regional snow depth spreads at Agano basin in recent years. ②Japan sea origin snow distributed wide area in Agano basin. but Agano basin east side consists of different snow from Japan sea origin. ③Snow condition of east side is is distributed irrespective of heavy snow and little snowfall. ④A boundary line of Japan sea origin changes annual year. ⑤Peculiar snow related to a short-term temperature rise is also admitted in Ura-bandai area. It is expected to use climate change prediction database as rigional feature in basin.