Meteorological field patterns classified using self-organizing map (SOM)

Koji Nishiyama, Shinichi Endo, Kenji Jinno

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

In order to systematically and visually understand well-known but qualitative and relatively complicated relationships between synoptic fields in the BAIU season and heavy rainfall events in Japan, these synoptic fields were classified using the Self-Organizing Map (SOM) algorithm. This algorithm can convert complex nonlinear features into simple two-dimensional relationships, and was followed by the application of the clustering techniques of the U-matrix and the K-means. It was assumed that the meteorological field patterns be simply expressed by the spatial distribution of wind components at the 850 hPa level and Precipitable Water (PW) in the southwestern area including Kyushu in Japan. Consequently, the synoptic fields could be divided into eight kinds of patterns (clusters). One of the clusters has the notable spatial feature represented by high PW accompanied by strong wind components known as Low-Level Jet (LLJ). The features of this cluster indicate a typical meteorological field pattern that frequently causes disastrous heavy rainfall in Kyushu in the rainy season. From these results, the SOM technique may be an effective tool for the classification of complicated non-linear synoptic fields.

本文言語英語
ホスト出版物のタイトル31st IAHR Congress 2005
ホスト出版物のサブタイトルWater Engineering for the Future, Choices and Challenges
編集者Jun Byong-Ho, Il Lee Sang, Seo Il Won, Choi Gye-Woon
出版社Korea Water Resources Association
ページ3709-3718
ページ数10
ISBN(電子版)8987898245, 9788987898247
出版ステータス出版済み - 2005
イベント31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges - Seoul, 大韓民国
継続期間: 9 11 20059 16 2005

出版物シリーズ

名前31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges

会議

会議31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges
国/地域大韓民国
CitySeoul
Period9/11/059/16/05

All Science Journal Classification (ASJC) codes

  • 工学(その他)
  • 環境科学(その他)
  • 水の科学と技術

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