Climate in Biosphere
Online ISSN : 2185-7954
Print ISSN : 1346-5368
ISSN-L : 2185-7954
Autumn temperature deduced from historical records of autumn tints phenology of maple tree in Kyoto, Japan
Yasuyuki AONOAyaka TANI
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2014 Volume 14 Pages 18-28

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Abstract

 We investigated historical records (e.g. old diaries, historiography, and daily newspapers) and acquired phenological data series for autumn-tinted maple (Acer spp.) leaves in Kyoto, Japan. From the 10th to 21st centuries, we gathered 504 years of phenological data for maple leaves' autumn tints. A preliminary analysis suggested that the dates of the maple autumn tints were affected by the October mean temperature. Therefore, an attempt was made to reconstruct the October mean temperature in Kyoto by applying the phenological data for autumn tints of maple leaves. Autumn temperature series partially showed a pattern similar to springtime temperature series. A cooling trend over the 15th — 16th centuries and cool conditions in the late 17th and the early 19th centuries were detected in both the October and the March temperature series; however, October temperature change preceded March temperature change by about 10—20 years. This suggests that the time-lag of response of October temperatures in Kyoto to the solar variation may be smaller than that of March temperatures.

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© 2014 The Society of Agricultural Meteorology of Japan
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