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Roles of airsea and land-air interactions on East Asian monsoon variability during transition seasons

Research Project

Project/Area Number 15540416
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

TANIMOTO Youichi  Hokkaido Univ., Grad.School of Environmental Earth Science, Asso.Prof., 大学院・地球環境科学研究科, 助教授 (00291568)

Co-Investigator(Kenkyū-buntansha) YAMAZAKI Koji  Hokkaido Univ., Grad.School of Environmental Earth Science, Prof., 大学院・地球環境科学研究科, 教授 (70270791)
WATANABE Masahiro  Hokkaido Univ., Grad.School of Environmental Earth Science, Asso.Prof., 大学院・地球環境科学研究科, 助教授 (70344497)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2004: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2003: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsOcean-Atmosnhere Interaction / Tropics and Extratronics / Sea surface temperature / Surface wind / Latent heat flux / 数値実験 / 季節遷移期 / 年々変動 / 亜寒帯前線
Research Abstract

We examined thermal and dynamical structures of the lower atmosphere over the extratropical temperature front near Kuroshio extension and Oyashio where the deformation scale is less than a few of 100km. In addition, we also see the relation of sea surface temperature (SST) and surface air temperature to the surface wind velocity not only in the extratropics, but also tropics for the comparison. Over the warm flank of the thermal front near Kuroshio extension, the planetary boundary layer develops to 1000-1500m height because the static stability near the surface is very unstable. This unstable condition enhances the vertical mixing of the momentum, heat and moisture. As a result, a mixed momentum induces the acceleration of the surface wind over the warm water. This notion is not agreement with the conventional view of the extratropical air-sea interaction : the strong surface wind induces the cool ocean. These results indicate that that the ocean does in fact make feed back to the atmosphere. This does not mean that the traditional relationship is wrong, but rather that in these mid-latitude regions, a two-way relationship between the atmosphere and ocean exists. In addition, our analysis shows that the atmospheric response to this oceanic forcing appears to include the anomalous storm track activity. The observed atmospheric anomalies, which may be, in part, forced by the preexisting SST anomalies in those regions.

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (14 results)

All 2005 2004 2003 Other

All Journal Article (10 results) Book (1 results) Publications (3 results)

  • [Journal Article] SST-induced surface wind variations over the Brazil/Malvinas Confluence2005

    • Author(s)
      Tokinaga, H.
    • Journal Title

      Journal of Climate (in press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] SST-induced surface wind variations over the Brazil/Malvin as Confluence2005

    • Author(s)
      Tokinaga, H.
    • Journal Title

      Journal of Climate (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Seasonal transition of SST anomalies in the tropical Indian Ocean during El Nino and Indian Ocean2004

    • Author(s)
      Tokinaga, H.
    • Journal Title

      Journal of the Meteorological Society of Japan 82

      Pages: 1007-1018

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Observed associations among storm tracks, jet streams and midlatitude oceanic fronts. Ocean-Atmosphere Interaction and Climate Variability2004

    • Author(s)
      Nakamura, H.
    • Journal Title

      Geophys.Monogr., American Geophysical Union

      Pages: 329-348

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Seasonal transition of SST anomalies in the tropical Indian Ocean during El Nino and Indian Ocean Dipole years2004

    • Author(s)
      Tokinaga, H.
    • Journal Title

      Journal of the Meteorological Society of Japan 82

      Pages: 1007-1018

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Observed associations among storm tracks, jet streams and midlatitude oceanic fronts. Ocean-Atmosphere Intereaction and Climate Variability.2004

    • Author(s)
      Nakamura, H., T.Sampe, Y.Tanimoto, A.Shimpo
    • Journal Title

      Geophys.Monogr., American Geophysical Union 147

      Pages: 329-345

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Seasonal transition of SST anomalies in the tropical Indian Ocean during El Nino and Indian Ocean Dipole years2004

    • Author(s)
      Tokinaga, H., Y.Tanimoto
    • Journal Title

      Journal of the Meteorological Society of Japan 82・4

      Pages: 1007-1018

    • NAID

      110001803126

    • Related Report
      2004 Annual Research Report
  • [Journal Article] An active role of extratropical sea surface temperature anomalies in determining anomalous turbulent heat flux2003

    • Author(s)
      Tanimoto, Y.
    • Journal Title

      Journal of Geophysical Research-Oceans 108(C10)

    • NAID

      120000955248

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 中緯度海域における乱流熱フラックス交換に果たす海面水温の役割2003

    • Author(s)
      谷本陽一
    • Journal Title

      月刊海洋 35(11)

      Pages: 815-820

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] An active role of extra tropical sea surface temperature anomalies in determining anomalous turbulent heat flux2003

    • Author(s)
      Tanimoto, Y.
    • Journal Title

      Journal of Geophysical Research-Oceans 108(C10)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Book] 実践! 気候データ解析2005

    • Author(s)
      松山洋, 谷本陽一
    • Total Pages
      107
    • Publisher
      古今書院
    • Related Report
      2004 Annual Research Report
  • [Publications] Tanimoto, Y., H.Nakamura, T.Kagimoto, S.Yamane: "An active role of extratropical sea surface temperature anomalies in determining anomalous turbulent heat flux"Journal of Geophysical Research-Oceans. 108(C10). JC001750 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 谷本陽一: "中緯度海域における乱流熱フラックス交換に果たす海面水温の役割"月刊海洋. 35(11). 815-820 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 向川均, 大淵済, 谷本陽一共訳, 松野太郎監訳: "原著Burroughs著「Climate Change」Cambridge University Press"スプリンガーフェアラーク・ジャパン. 331 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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