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Large-scale water cycle around the Baiu frontal zone associated with abnormal weather conditions

Research Project

Project/Area Number 06640557
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionNagoya University

Principal Investigator

KATO Kuranoshin  Institute for Hydrospheric-Atmospheric Sciences, Nagoya University, Assistant Professor, 大気水圏科学研究所, 助手 (90191981)

Co-Investigator(Kenkyū-buntansha) AONASHI Kazumasa  Japan Meteorological Agency, Senior Scientist, 予報研究部, 主任研究官
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1995: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1994: ¥800,000 (Direct Cost: ¥800,000)
KeywordsBaiu front / Subtropical front / Water cycle in East Asia / Abnormal weather / Water cycle around the frontal zone / Baiu Asian Monsoon / GEWEX / Variability of weather & water cycle around Japan in summer
Research Abstract

As a step for understanding the water cycle in East Asia associcated with the abnormal weather conditions in warm season, analyzes were investigated, by using the precipitation data provided by China and those derived from SSM/I date (19.35 GHz and 85.5 GHZ.the algorithm by Liu and Curry (1992) were used). The main results are as follows.
1. In the Meiyu season of 1991 the extreme flood occurred in the Huaihe River Basin in China. Especially in early July when the biggest flood occurred, the active Meiyu front persisted without change in its location. Interestingly, the persistent frontal zone consisted of the wide-spread "heavy rainfall area" (its meridional width of about 200 km) with rainfall amount more than 50 mm/day. Furthermore, not only the huge moisture inflow from the southern boundary but also very small outflow from the north resulted in the extremely large "frontal-scale" moisture convergence and its concentration throughout this period.
2. In 1993 summer (extreme cool summe … More r in Japan), the total rainfall amount estimated by the SSM/I data was very large associated with the persistent Baiu front even in August. Furthermore, the contribution of the Typhoon was also large. The former fact seems to be largely due to the following atmospheric conditions : 1) the anomaly of the low-level temperature gradient across the Baiu front was much larger, 2) the Baiu front was located near the southern edge of the southward-shifted slow-moving upper-level trough, with its distinct separation from the polar frontal zone to the north of 60 N.
3. The rainfall and the moisture informations derived from the SSM/I data showed a large impact to the numerical prediction of the meso-scale rainfall systems observed around the middle of July 1988.
4. The drought in the middle and the eastern part of Japan in 1994 summer was moderated in autumn. However, the drought in 1995 summer became more serious in autumn. The seasonal change of the anomalous conditions would be rather complicated year to year and is a reamaining problem in the future. Less

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] 加藤 内蔵進: "ヤマセに関連するオホーツク海高気圧の総観的特徴" 気象研究ノート(日本気象学会). 183. 67-90 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Naohiko Hirasawa: "Abrupt change in the characteristics of the frontal zone in subtropical East Asia around the middle of May" J. Meteor. Soc. Japan. 73(2). 221-239 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kuranoshin Kato: "Diurnal variation of Cb-clusters over China and its relation to large-scale conditions in the summer of 1979" J. Meteor. Soc. Japan. 73(6). 1219-1234 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Si Gongwang: "The early summer seasonal change of large-scale circulation over East Asia and its relation to change of the frontal features and frontal rainfall environment during 1991 summer" Advances in Atmospheric Sciences. 12(2). 151-176 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kazumasa Aonashi: "The import of assimilating SSM/I precipitable water and rain flag data on humidity analysis and short-term precipitation forcasts" J. Meteor. Soc. Japan. 74(1). 77-99 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kazumasa Aonashi: "An over-ocean precipitation retrieval using SSM/I multichannel brightness temperatures" J. Meteor. Japan. 74(5). 617-637 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 加藤 内蔵進(分担執筆): "山と日射と水循環(日本の自然(地域編)4)「中部」(野上道雄 他編)" 岩波書店, 182 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 加藤 内蔵進(分担執筆): "日本の自然(地域編) 8「南の島々」(中村 和郎 他編)" 岩波書店, 216 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hirasawa, N.: "Adrupt change in the characteristics of the frontal zone in subtropical East Asia around the middle of May." J.Meteor.Soc.Japan. 73(2). 221-239 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kato, K.: "Diurnal variation of Cb-clusters over China and its relation to large-scale conditions in the summer of 1979." J.Meteor.Soc.Japan. 73(6). 1219-1234 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Si, Gongwang: "The early summer seasonal change of large-scale circulation over East Asia and its relation to change of the frontal features and frontal rainfall environment during 1991 summer." Advances in Atmospheric Sciences. 12(2). 151-176 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Aonashi, K.: "The import of assimilating SSM/I precipitable water and rain flag data on humidity analysis and short term precipitation forcasts." J.Meteor.Soc.Japan. 74(1). 77-99 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Aonashi, K.: "An over-ocean precipitation retrieval using SSM/I multichannel brightness temperatures." J.Meteor.Soc.Japan. 74(5). 617-637 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kazumasa Aonashi: "An over-ocean precipitation retrieval using SSM/I multichannel brightness temperatures" J.Meteorological Society of Japan. 74・5. 617-637 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 加藤内蔵進: "東海地方の渇水と降雨傾向" 日本気象学会中部支部公開気象講座テキスト,第3回. 10-25 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kuranoshin Kato: "Preliminary results on moisture balance around the Huaihe River basin during May to August 1991." Proceedings of International Workshop on the Climate System in Monsoon Asia. 69-72 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kuranoshin Kato: "Scientific interest of GAME/HUBEX and some results of the pilot study on the basin-scale water cycle as a subsystem of the global-scale Asian Monsoon." Proceedings of the Second International Workshop on the East Asian Monsoon. 28-31 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 加藤内蔵進(分担執筆): "日本の自然(地域編)8「南の島々」(中村和郎他4名編)" 岩波書店, 216 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Naohiro Hirasawa: "Abrupt change in the characteristics of the frontal zone in subtropical East Asia aroud the middle of May" J.Meteor.Soc.Japan. 73. 221-239 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Kuranoshin Kato: "Diurnal variation of Cb-clusters over China and its relation to large-scale conditions in the summer of 1979" J.Meteor.Soc.Japan. 73. 1219-1234 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Si Congwang: "The early summer seasonal change of large-scale circulation over East Asia and its relation to change of the frontal features and frontal rainfall environment during 1991 summer" Advances in Atmospheric Sciences. 12. 151-176 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 加藤内蔵進: "1991年の大陸上の梅雨前線帯の広域雲・降水活動について(中国淮河流域大洪水年の事例解析)" 生研フォーラム「宇宙からの地球環境モニタリング」論文集. 5. 30-37 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Kazumasa Aonashi: "The import of assimilating SSM/I precipitable water and rain flag data on humidity analysis and short-term precipitation forcasts" J.Meteor.Soc.Japan. 74. 77-79 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Kuranoshin Kato: "A review on meso-α-scale systems and large-scale features of the Baiu frontal zone in East Asia" Proceedings of International Workshop on Heavy Rainfall in East Asia,Seoul University,Korea. 59-65 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Naohiko Hirasawa: "Abrupt change in the characteristics of the frontal zone in subtropical East Asia around tne middle of May" J.Meteorological Society of Japan. 73(印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 加藤 内蔵進: "ヤマセに関連するオホーツク海高気圧の総観的特徴" 気象研究ノート(日本気象学会). 183. 67-90 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 加藤 内蔵進: "1991年7月の淮河流域大洪水に関連した大陸上の梅雨前線の活動の特徴について-HUBEX大規模スケール大気・陸面システムと亜熱帯前線帯の変動に関するパイロットスタディの中間報告-" TRMM研究会予稿集(地球観測委員会TRMMプロジェクトチーム). 5. 82-83 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 加藤 内蔵進: "梅雨期の亜熱帯高気圧域の水蒸気場と浅い対流についての総観解析(1988年7月前半の事例解析)" 生研フォーラム「宇宙からの地球環境モニタリング」論文集. 4(印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 加藤 内蔵進: "山と日射と水循環(日本の自然(地域編)4「中部」)" 岩波書店, 182 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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