1. Separating Different Scales of Motion in Time Series of Meteorological Variables
2. Hirota, T., Koga, N., Iwata, Y., Inoue, S., Nemoto, M., and Hamasaki, T., 2011: Climatic features of spring to summer in 2010 and their impacts on agriculture in Hokkaido. Misc. Pub. Natl. Agric. Res. Cent. Hokkaido Reg., 69, 1-13.
3. Hokkaido District Agriculture Office, 2007: Rice yield in Hokkaido in 2007. (available at http://www.maff.go.jp/hokkaido/toukei/kikaku/sokuho/2007/pdf/071207suitou.pdf on June 10, 2011) (in Japanese).
4. Hokkaido District Agriculture Office, 2010: Rice Yield in Hokkaido in 2010. (available at http://www.maff.go.jp/hokkaido/toukei/kikaku/sokuho/pdf/2010_syuukakuki_suitou_kouhyo.pdf on June 10, 2011)(in Japanese).
5. JMA (Japan Meteorological Agency), 2005: Regional climate change projection using the regional climate model (RCM20). 3.2.1 Air temperature. Global Warming Projection, 6, 31-39 (in Japanese).