札幌周辺の局地的異常降雪のレーダーエコー解析の特徴

• 菊地 勝弘

  北大大学院理学研究科地球惑星科学専攻 秋田県立大学生物資源科学部生物環境科学科

• 長石 唯人

  北大大学院理学研究科地球惑星科学専攻 (株)ウエザーニューズ

• 遊馬 芳雄

  北大大学院理学研究科地球惑星科学専攻

• 上田 博

  北大大学院理学研究科地球惑星科学専攻

• 金村 直俊

  (株)札幌総合情報センター

• 藤井 雅晴

  (株)札幌総合情報センター

書誌事項

タイトル別名

• Radar Echo Characteristics of the Localized Heavy Snowfalls around Sapporo, Japan.

抄録

The radar echo analysis in which the heavy snowfall intensity stronger than 6cmh^-1 in snow depth was recorded on the lower elevation angle of radar scanner was carried out from the viewpoint of traffic transport facilities and localized heavy snowfall phenomena on the Ishikari Plain including Sapporo, Hokkaido, Japan. From the analysis of radar echo, it was clarified that there were high frequency areas. Furthermore, it was understood that there were some areas with sudden changes in snowfall intensity stronger than 10 cmh^-1 in a limited few km² in a horizontal scale and 10 minute duration in calm weather condition. Vertical cross section analyses across the abnormal heavy snowfall areas in which there were recorded with an intensity stronger than 6 cmh^-1 by radar showed that the drastic increase of snowfall intensity occurred between 200m and 400m above the ground surface. The change of the maximum value of the radar echo intensity at around 200m level was estimated by the growth of large snowflakes which were aggregated and formed quickly under the horizontal and vertical wind shears at the same level.

収録刊行物

• 雪氷

  雪氷 63 (2), 239-251, 2001

  公益社団法人 日本雪氷学会

キーワード

• レーダーエコー
• 異常降雪
• 雪結晶

詳細情報

• CRID: 1390001206460172032
• NII論文ID: 10007384688
• NII書誌ID: AN00131221
• DOI: 10.5331/seppyo.63.239
• ISSN: 18836267
• ISSN: 03731006
• NDL書誌ID: 5731988
• Web Site: http://id.ndl.go.jp/bib/5731988
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5731988
• 本文言語コード: en
• 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