9:45 AM - 10:00 AM
[MIS20-04] Air and ground temperature conditions on alpine and sub-apline zone of Norikura Volcano, Northern Japanese Alps
Keywords:air temperature observation, ground temperature observation, forest limit, alpine zone, norikura volcano, Northern Japanese Alps
The annual mean air temperatures on the forest limit were 0.1 ℃ in 2014 and -0.3 ℃ in 2017. The warmth index (WI) on the forest limit were 19.7 ℃・months in 2014, 21.8 ℃・months in 2015, and 19.8 ℃・months in 2017, respectively. This WI value exceeds 15℃・months of Kira's WI for the forest line in Japan. This result supports the proposal that the forest line of Norikura volcano is controlled not by thermal conditions but by other factors such as the prevailing wind or snow cover.