Climate in Biosphere
Online ISSN : 2185-7954
Print ISSN : 1346-5368
Development of grid square air temperature and precipitation data compiled from observed, forecasted, and climatic normal data
HIROYUKI OHNOKAORI SASAKIGENJI OHARAKOU NAKAZONO
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2016 Volume 16 Pages 71-79

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Abstract

We developed a method for determining nationwide 1 km-grid square values of daily mean, maximum and minimum air temperature, and daily precipitation in Japan. The data were obtained using the JMA's nationwide observations, numerical forecasts, and climatic normal values. RMSE values for these elements in the past were 0.66 °C, 0.98 °C, 1.10 °C, and 5.9 mm/day, while those for one-day future were 1.18 °C, 1.65 °C, 2.00 °C, and 11.0 mm/day, respectively. The improvement in accuracy by introducing the forecasts was recognized even for values six-day future, though errors tended to increase with forecast range. The data are intended for use in the management of currently growing crops with a combination of crop models.

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© 2016 The Society of Agricultural Meteorology of Japan
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