On the Year climate in Japan

概要

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Adopting the Köppen's climatic formulae on climate of each year (=year climate) in Japan, the author has investigated geographical distribution patterns of year climate type of each year and observed frequencies of various climatic types on each station. 1) In Japan, ordinary climatic types in average condition are Cfa or (Dfa) at almost all stations. But he can find many years which show w or s climates. 2) Climatic regions of w or s climates shift geographically from year to year having five patterns, as are shown. Fig. 2 and 3. 3) He considerd that a region in which any one climatic type predominates remarkably than others with significant differences is a core climatic region. And he recognized some core regions of Cfa, Cwa, (Dfa), Dfa and Dfb as are shown in the Figs. 4_??_7. Also their transitional regions are found. 4) Types of Cfb, Cwb, (Dfb), (Dwb), (Dsb), and Dwb which means cool summer, appeared at the Sanriku District frequently. And summer dry climates, namely Csa, (Dsa), (Dsb), Dsa, Dsb and Dsc, are observed almost everywhere once per decade. 5) The climatic divide of the Pacific Side and the Japan Seaside climate can be detected as a boundary line of w and s climate. As discrepant divides, lie can count the dividal ridge of the Kitakami-, Joetsu- and Chugokumountains.
The Association of Japanese Geographersの論文