サクラの開花資料による小氷期の気候復元の試み

抄録

In order to reconstruct the climate in a historical age, especially in the Little Ice Age, phenological data, such as the blossoming day of cherry, are available in a diary. The aim of this paper is to estimate monthly mean temperatures in March by the blossoming date of cherry flowers (Prunus yedoensis matsum) in Kakuson Nikki (Diary) at Kanazawa City and Shinkakuji Nikki (Diary) at Tosa City. Results were summarized in Table 1. Monthly mean temperature in the 19th century was lower by about 1°C than that for the present.