Kenji Kamiguchi, Osamu Arakawa, Akio Kitoh, Akiyo Yatagai, Atsushi Hamada and Natsuko Yasutomi
Release Date: June 19, 2010

Development of APHRO_JP, the first Japanese high-resolution daily precipitation product for more than 100 years
Kenji Kamiguchi1), Osamu Arakawa1), Akio Kitoh1), Akiyo Yatagai2), Atsushi Hamada2) and Natsuko Yasutomi2)

1) Meteorological Research Institute
2) Research Institute for Humanity and Nature

(Received: December 27, 2009)
(Accepted for publication: May 20, 2010)

Abstract:
We constructed historical (1900–) high-resolution (0.05° × 0.05°) daily precipitation data over the Japanese land area as part of the product of the “Asian Precipitation – Highly-Resolved Observational Data Integration Towards Evaluation of the Water Resources” (APHRODITE) project. This product APHRO_JP is derived from rain gauge observations and is intended to accurately represent both mean and extreme values. Due to new interpolation techniques developed in APHRODITE, estimation accuracy for orographic precipitation is improved, and bias for long-term amount is reduced, even for the early 20th century in which the observation network was sparse in space. Moreover, the product can be used for statistical analysis of heavy precipitation up to about 150 mm/day, over a long term period (≥ 100 years).
APHRO_JP enables diverse research, including validation of meso-scale models and analysis of the longterm extreme precipitation trend in Japan.

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To cite this article:
Kenji Kamiguchi, Osamu Arakawa, Akio Kitoh, Akiyo Yatagai, Atsushi Hamada and Natsuko Yasutomi: “Development of APHRO_JP, the first Japanese high-resolution daily precipitation product for more than 100 years”, Hydrological Research Letters, Vol. 4, pp.60-64, (2010) .

doi:10.3178/hrl.4.60
JOI JST.JSTAGE/hrl/4.60
Copyright (c) 2010 Japan Society of Hydrology and Water Resources