日本海側地域における冬季降水量の年々変動の地域性

• 高橋 信人

  東北大学大学院理学研究科地理学教室

書誌事項

タイトル別名

• Regional Difference of Year-to-Year Variations of Winter Rainfall in the Japan-Sea Side Region
• ニホンカイガワ ニ オケル トウキ コウスイリョウ ノ ネンネン ヘンドウ ノ チイキセイ

抄録

The Japan-Sea side region is known as much monsoonal rainfall, and there are regional differences of year-to-year variation in this region, but reasons for these are not investigated sufficiently. In this paper, at first, the Japan-Sea side region is divided into four subregions; ‘Hokkaido’, ‘Tohoku’, ‘Hokuriku’ and ‘San-in’.<br>Next, in each region, the relationship between rainfall and monsoon, and the relationship between rainfall and depression activities are examined. Monsoon Index (MOI) is difined as the 1, 000hPa heights difference between four pairs of points on different parallels of latitude over Japan Islands, and depression activities are shown as the distribution of depressions' passage frequencies.<br>The results are summarized as follows;<br>1) In ‘Hokkaido’ and ‘Hokuriku’, the main factor of rainfall variations is monsoon, while in ‘Tohoku’, it is Japan-Sea lows, and in ‘San-in’, it is Paciffic lows.<br>2) The rainfall variations' difference between ‘Hokkaido’ and ‘Hokuriku’ is caused by the secondary factor; that is Japan-Sea lows.<br>3) The relationship between rainfall and sea level pressure field or 500hPa height field correspond to the relationship between rainfall and the year-to-year rainfall variation factors such as monsoon and depression activities.

収録刊行物

• 季刊地理学

  季刊地理学 52 (4), 272-282, 2000

  東北地理学会

キーワード

• 日本海側地域
• 冬季降水量
• 年々変動
• 低気圧活動
• 循環場

詳細情報

• CRID: 1390001204465094784
• NII論文ID: 10004952243
• NII書誌ID: AN10379267
• DOI: 10.5190/tga.52.272
• ISSN: 18841252
• ISSN: 09167889
• NDL書誌ID: 5629630
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5629630
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可