Estimation of long term data set of mean annual temperature in the Forest Therapy Research Institute of the University of Tokyo Forests and the University of Tokyo Chiba Forest

東京大学大学院農学生命科学研究科附属演習林富士癒しの森研究所および千葉演習林札郷, 清澄において, 過去, 様々な方法, 機器で観測されてきた気温データから, 器差補正をする方法および1日1～5回の観測値から年平均気温を推定する方法を提案し, 推定式の係数を求め，3地点の年平均気温の推定値を長期にわたって求めた。富士癒しの森研究所の推定値は2008年を除き, 山中アメダスにおける観測値と0.11度以上の差はなかった。観測露場の移転や観測機器の変更が行われた場合は, 二重観測期間があれば, そのデータを用いて, 変更前後のデータを接続できることが示された。Air temperature has been observed at three stations in The University of Tokyo Forests over a long period using various equipment, timings and intervals. The three stations were the Forest Therapy Research Institute, Fudago and Kiyosumi in The University of Tokyo Chiba Forest. The mean annual temperature was estimated from the observed air temperature data by a linear equation and the parameter was determined using the observed data and AMeDAS data. The difference between the estimated mean annual temperature at the Forest Therapy Research Institute and the observed mean annual temperature in the Yamanaka AMeDAS was less than 0.11 degree except in 2008. It was possible to connect the data before and after the change of the observation field, equipment, time or time interval, when overlapping observation data were available.英文キーワード: mean annual temperature|long-term data|Forest Therapy Research Institute of The University of Tokyo Forests. Fudago in The University of Tokyo Chiba Forest, Kiyosumi in The University of Tokyo Chiba Fores