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Seasonal variations of the sea level at Syowa Station

Research Project

Project/Area Number 04452069
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 気象・海洋・陸水学
Research InstitutionMie University (1994)
The University of Tokyo (1992-1993)

Principal Investigator

NAGATA Yutaka  Faculty of Bioresources, Mie University Professor, 生物資源学部, 教授 (80011493)

Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1992: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsSea level / Syowa Station / seasonal variation / salinity / Katabatic wind / 水位変動 / 40日周期 / 海流変動
Research Abstract

The sea level record at Syowa Station, Antarctica for the period from 1979 to 1988 was analyzed, and the seasonal variations of the sea level and its yearly change were investigated. The level reaches a maximum in early winter and falls to its minimum in mid-summer. The variation pattern is very skewed with flat winter peak and sharp summer trough. The ascending speed in fall is much larger than the descending speed in spring. This variation pattern is just opposite to that of the sea-level in middle latitudes, where the peak occurs in late summer and the trough in mid-winter. The correlation of the sea level change with several oceanographic and meteorological phenomena were studied. The winter peak of sea level is observed in Subarctic North Pacific Ocean and its marginal seas such as in the Okhotsk Sea. This is caused by a salinity decrease in the oceanic surface layr in winter. The salinity variation in the surface layr near Syowa Station indicates that the sea level rise at the very early stage in autumn may be explained by the decrease of salinity of the surface layr, but the main feature of the variation cannot explained. The similar variation pattern is observed in speed change of the Katabatic winds at several coastal stations in east Antarctica. Physical relationship between the sea level and the Katabatic wind speed is not clear in the present stage, but the year-by-year change of the variation pattern found in this study will give a good reference to the future investigations.

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Y.Nagata: "Laboratory expreriments of dense water descending on continental slope" Deep Ocean Circulation,Elsevier Oceanogr.Series. 59. 333-350 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 永田豊: "北太平洋中層水の生成機構と太平洋西部亜寒帯海域" 月刊海洋 号外. 5. 196-204 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Nagata: "Seasonal Variation of the sea level at Syowa Station." Proc.of NIPR Symposium on Polar Met.and Glac.7. 60-72 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] L.D.Talley: "North Pacific Imtermediate Water in the Kuroshio/Oyashio mixed water region" J.Phys.Oceanogy.(印刷中). (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Nagata, Y., R.Kimura, H.Honji, Y.Yamazaki, K.Kawaguchi and T.Hosoyamada: "Laboratory experiments of dense water descending on continental slope." Deep Ocean Circulation, Elsevier Oceanogr.Series. 59. 333-350 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Nagata, Y.: "Formation mechanism of the North Pacific Intermediate Water in the Western Subarctic North Pacific.(in Japanese)" Gekkan-Kaiyo. s-5. 196-204 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Nagata, Y., M.Kawamiya.Y.Michida and M.Odamaki: "Seasonal variations of the sea level at Syowa Station." Proc.of NIPR Symposium on Polar Met.and Glac.7. 60-72 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] L.D.Talley, Y.Nagata, M.Fujimura, T.Iwao, T,Kono, D.Inagake, M.Hirai, and K.Okuda: "North Pacific Intermediate Water in the Kuroshio/0yashio mixed water region." J.Phys.Oceanogr.(in press). (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Nagata: "Laboratory experiments of dense water descending on continental slope." Deep Ocean Circulation,Elsevier Oceanogr.Series. 59. 333-350 (1933)

    • Related Report
      1994 Annual Research Report
  • [Publications] 永田豊: "北太平洋中層水の生成機構と太平洋西部亜寒帯海域。" 月刊海洋、号外. 5. 196-204 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Nagata: "Seasonal variations of the sea level at Syowa Station." Proc.of NIPR Sym.on Polar Met.and Glac.7. 60-72 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] L.D.Talley: "North Pacific Intermediate Water in the Kuroshio/Oyashio mixed water region." J.Phys.Oceanogr.(印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Nagata 他: "Laboratory experiments of dense water descending on continental slope.in Deep Ocean Circulation-Physical and Chemical Aspects.ed.T.Teramoto" Elsevier Oceanogr.Seris. 59. 333-350 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Y.Nagata 他: "Seasonal variations of the sea level at Syowa Station." Proc.of NIPR Symposium on Polar Meteorology and Glaciology. 7. 60-72 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 永田 豊・大谷 清隆・柏井 誠: "北太平洋亜寒帯循環" 海の研究. 1. 75-104 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 永田 豊: "北太平洋中層水の生成機構と太平洋西部亜寒帯海域" 月刊海洋.

    • Related Report
      1992 Annual Research Report
  • [Publications] 永田 豊・鍵本 崇・高杉 知・石田 享一・轡田 邦夫: "北太平洋中層水の起源としての高塩の津軽暖流水" 月刊海洋.

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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