An Application of EOF Analysis to Identify the Driving Force of Lake Currents in Kitaura

• KOMATSU Nobuyuki

  Ibaraki Kasumigaura Environmental Science Center

• ISHII Yuichi

  Ibaraki Kasumigaura Environmental Science Center

• HOMMA Takamitsu

  Ibaraki Kasumigaura Environmental Science Center

• WATANABE Keiji

  Ibaraki Kasumigaura Environmental Science Center

• NEGISHI Masami

  Ibaraki Kasumigaura Environmental Science Center

Bibliographic Information

Other Title

• ＥＯＦ解析を用いた北浦の湖流変動要因の検討
• EOF カイセキ オ モチイタ キタウラ ノ コリュウ ヘンドウ ヨウイン ノ ケントウ

Abstract

The driving force of lake currents was studied using an Acoustic Doppler Current Profiler (ADCP) deployed at eight sites in Lake Kitaura. Empirical Orthogonal Function (EOF) analysis has been widely used in both meteorology and oceanography. The results of EOF analysis applied to the axial currents (northward component) datasets show that Mode 1, containing 74.9-93.3 % of the variance, is highly correlated with wind speed. The effect of the in-flow/out-flow through the Wani River is somewhat apparent in Mode 2. Wind effects on lake currents were evaluated quantitatively. As these results represented actual physical mode, we concluded that EOF analysis was suitable for determining lake current data.

Journal

• Japanese Journal of Limnology (Rikusuigaku Zasshi)

  Japanese Journal of Limnology (Rikusuigaku Zasshi) 69 (1), 39-49, 2008

  The Japanese Society of Limnology

Keywords

• EOF analysis
• ADCP
• lake current
• wind-driven current
• Lake Kitaura
• Kasumigaura

Details

• CRID: 1390282679036925568
• NII Article ID: 10021102583
• NII Book ID: AN0024866X
• DOI: 10.3739/rikusui.69.39
• ISSN: 18824897
• ISSN: 00215104
• NDL BIB ID: 9516274
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9516274
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed