著者
財城 真寿美 三上 岳彦
出版者
公益社団法人 東京地学協会
雑誌
地学雑誌 (ISSN:0022135X)
巻号頁・発行日
vol.122, no.6, pp.1010-1019, 2013-12-25 (Released:2014-01-16)
参考文献数
25
被引用文献数
4

Climate variations in Tokyo based on reconstructed summer temperatures since the 18th century and instrumental meteorological data from the 19th century to the present are discussed. During the Little Ice Age, especially in the 18th century, remarkably cool episodes occurred in the 1730s, 1780s and 1830s. These cool conditions could be a significant reason for severe famines that occurred during the Edo period. Around the 1840s and 1850s near the end of the Edo period, it was comparatively warm which could correspond to the end of the Little Ice Age in Japan. Although there was a low-temperature period in the 1900s, a long-term warming trend could be seen especially in winter temperatures and daily minimum temperatures throughout the 20th century. While annual precipitation has been increasing during the last 30 years, relative humidity has been decreasing. This could result from a saturated vapor pressure rise due to warming and from a loss of water bodies due to urbanization. During the last century, not only warmer conditions but also wetter conditions in summer and autumn and drier conditions in winter and spring were documented by analyzing hythergraphs.

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江戸時代の気温分かるかな?と思ったら、 1700-2000年の東京7月平均気温記録あった〜 サンキューシーボルト達。日本地図盗みよったけどやるやん 気象庁で現在の平均気温を流し見。今は上が3-4度高い? 江戸はエアコンないし植物が… https://t.co/eBnO53AGGA
クグルといろいろ出てくるけど、取り敢えず江戸時代の夏の平均気温を考察した文献 https://t.co/rTRHgHFRMs
@CuveeYoshiko 18世紀の7月の江戸の平均気温は23.7度だったそうで。19世紀半ばまで小氷期だったからあれでよかったんでしょう。 https://t.co/QVJRzfjNky

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