A study on the ice changes and the bottom layer water temperature rise of Japan lakes due to global warming

• Project/Area Number: 24501286
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geography
• Research Institution: Chiba University
• Principal Investigator: HAMADA HIROMI 千葉大学, 教育学部, 教授 (60292653)
• Co-Investigator(Kenkyū-buntansha): OYAGI Hideo 日本大学, 文理学部, 助教 (50453866)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2012: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
• Keywords: 水温 / 水質 / 地球温暖化 / 循環 / 田沢湖 / 摩周湖 / 十和田湖 / 倶多楽湖 / 支笏湖 / 湖沼 / 水温上昇 / 結氷

Outline of Final Research Achievements

In this study, we focused on the changes in the freezing phenomenon associated with the bottom layer water temperature rise and the lake overall water temperature changes in the Japanese domestic lakes due to global warming, clearly the effect of future temperature rise of the domestic large deep lakes on the lake environment it was intended to be. This study was carried out continuous water temperature observations by logger in Lake Mashu and Lake Kuttara. Shikotsuko, Towada, Motosu and Lake Tazawa of an ice-free lakes, I went the observation of vertical distribution of detailed water temperature and water quality.
Frozen over Lakes was winter coverd by ice because cooling depth is limited. An ice-free lakes has been cooling overall lake. Future, by global warming, it is believed that the water temperature of the winter also lakes that had been freezing occurs a significant impact on the circulation form and ecosystems not have to be 4 ℃ or less.

Research Products

• [Presentation] 日本国内の大深度湖沼の水温鉛直分布と循環 (2014)
  • Author(s): 濱田 浩美，大八木 英夫,知北 和久,牧野 晶
  • Organizer: 陸水物理研究会
  • Place of Presentation: 金沢大学環日本海域環境研究センター臨海実験施設（石川県鳳珠郡能登町）
  • Year and Date: 2014-12-06 – 2014-12-07
• [Presentation] 日本国内の大深度湖沼の水温・水質の鉛直分布と循環 (2014)
  • Author(s): 濱田 浩美，大八木 英夫,知北 和久，田中 敦，武内 章記,牧野 晶,五十嵐 聖貴,深澤 達矢,南 尚嗣,小林 拓，藤江 晋
  • Organizer: 日本陸水学会
  • Place of Presentation: 筑波大学（茨城県つくば市）
  • Year and Date: 2014-09-10 – 2014-09-13
• [Presentation] 同位体分析と水質を用いた摩周湖漏水の検討 (2013)
  • Author(s): 濱田浩美，田中 敦，五十嵐聖貴，深澤達矢， 南 尚嗣，小林 拓，藤江 晋，大八木英夫
  • Organizer: 日本陸水学会
  • Place of Presentation: 龍谷大学（大津市）
• [Presentation] 同位体分析と水質を用いた摩周湖の漏水量の推定 (2013)
  • Author(s): 濱田浩美，田中 敦，五十嵐聖貴，深澤達矢， 南 尚嗣，小林 拓，藤江 晋，大八木英夫
  • Organizer: 陸水物理研究会
  • Place of Presentation: 京都大学地球熱学研究施設（別府市）
• [Presentation] 富士山周辺の湖沼における透明度の長期的変動 (2013)
  • Author(s): 大八木英夫・濱田浩美
  • Organizer: 日本地理学会
  • Place of Presentation: 立正大学
• [Presentation] 摩周湖への流入河川の流量と栄養塩負荷 (2012)
  • Author(s): 濱田浩美・田中敦・五十嵐聖貴・藤江晋・深澤達矢・小林拓・南尚嗣
  • Organizer: 陸水物理研究会
  • Place of Presentation: 三重大学