Rainfall characteristics and their interannual variability at the Institute for Nature Study, located in central Tokyo, were investigated using hourly and daily rainfall data, mainly from July 1990 to August 2021. Large interannual variabilities in monthly rainfall and the number of rainy days were found in October and July, respectively. Meanwhile, higher frequencies of heavy (≥5 mm/h and ≥10 mm/h) and light rainfalls (≥1 mm/h and <5 mm/h) were observed in October and June, respectively. Additionally, from the viewpoint of long-term change, the ratios of October rainfall and daily maximum rainfall in October to the annual rainfall tended to increase since around 2001. We suggest that the rainfall contribution caused by typhoons in October to the annual rainfall increased and was closely connected to the larger mean rainfall intensity in October since around 2001.
雑誌名
Geographical reports of Tokyo Metropolitan University
巻
57
ページ
47 - 54
発行年
2022
ISSN
03868710
書誌レコードID
AA00200173
著者版フラグ
publisher
出版者
Department of Geography Tokyo Metropolitan University
Rainfall characteristics at the institute for nature study, Tokyo and their interannual variability
20005-057-006.pdf
(2.14MB)
