流域に氷河を有する深水湖の躍層内の二重拡散対流と深層の酸素供給に関する研究

盆地有冰川的深水湖斜面双扩散对流与深层供氧研究

• 批准号: 05J03546
• 负责人: 長谷川 直子 (石黒 直子)
• 金额: $ 0.77万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05J03546/
• 关键词: 陸水物理学; 密度流; 気候変動; 濁度; 湖; フランス:スイス; 溶存酸素

レマン湖の長期的な熱的動態と気候変動との関連性について解明するため、水温と風速の観測データを用いて安定度の解析を行った。その結果、冬季の湖の安定度長は風速に大きく左右されることが明らかになった。冬季のローヌ川起源の低温高濁水が密度流となり深層へ溶存酸素を供給しているという仮説に基づき、冬季のローヌ川起源の密度流の規模と発生時期を把握するため、現在レマン湖深層に自記水温計と電磁流速計を設置し計測している。2005年9月には現地観測を行い、レマン湖に流入する融氷起源の低温高濁度水が湖内でどのように挙動しているのかの全体像を把握することを試みた。その結果、以下の点が明らかになった。1、低温高濁水は河口至近で10m~30m深にほぼ定常的に流入していた。2、いっぽう、流入してくるローヌ川の水温や流量が日内で大きく変化している日にはその流入の様子が変化し、一時的に中層(10~30m)と深層の二層に分岐することがわかった。3、流向・流速計を用いて鉛直方向の流向・流速分布を計測したところ、濁水が流入している層では、湖の一般的な流れとは異なる流向・流速を示していることが明らかになった。本年度は一年目ということで流入河川水の挙動の全体像を把握するための予備観測的意味合いが強かった。今年度得られた結果により、翌年の観測の計画も立てていたが、特別研究員を終えることになったためにいったんこの研究を中断せざるをえない。本研究で得られた知見に基づき、あらたな観測資金を獲得し本テーマでの観測・調査の継続を考えている。

The dynamic response of the long-term weather in the lake, the dynamic response of the weather, the connection of the weather, the temperature of the water, the temperature, the temperature, the temperature, The results of the test, the stability of the lake during the winter season, the stability of the lake, the stability of the lake and the stability of the lake in winter. During the winter season, the source of low temperature, high temperature, high temperature, density flow, low temperature, high temperature, density flow, low temperature, high temperature, low temperature, low temperature, high temperature, low temperature, low temperature, high temperature, low temperature, low temperature, high temperature, low temperature, low temperature, high temperature, low temperature, high temperature, low temperature, low temperature, In September 2005, local farmers and lakes flowed into the lake. The origin of the storm is the low temperature and high temperature water in the lake. the whole picture shows that they are in good hands. Please click on the results below to clarify the results. 1. The steady inflow of low temperature and high water from the estuary to the near 10m~30m depth. 2. The temperature of the water flowing into the river, the temperature of the river, the temperature of the water, the temperature, the temperature and the temperature. 3. The flow velocity is calculated by the flow velocity distribution in the straight direction, the flow velocity distribution is calculated by the flow velocity distribution in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction, the flow velocity is calculated by the flow velocity in the straight direction In the current year, the whole picture of the movement of water flowing into rivers and rivers has grasped the meaning that it means to pay more attention. The results of this year were excellent, and the following year was planned to set up a training program, and special research personnel paid special attention to the interruption of the study. In this study, I was informed that I received the information of the basic education program and the financial information endowment program of this university.

项目成果

夏季のレマン湖内ローヌ川河口付近での湖水と河川水の混合状態について

夏季日内瓦湖罗讷河口附近湖水与河水的混合状态

• 期刊: お茶の水地理 46(印刷中)
• 作者: Matsui H;Sakabe M;Sakata H;Nakatani K;Ikeda K;Fukui M;Ando K;Yamagishi T;Nakajima Y;松井(八ツ橋)宏子;松井(八ツ橋)宏子;Miyake N;Miyake N;Miyake N;Shimokawa O;Matsumoto T;Takahira S;Ishiguro;石黒直子
• 通讯作者: 石黒直子

Double-diffusive convection in the thermocline of lake Geneva

日内瓦湖温跃层的双扩散对流

• 发表时间: 2006
• 期刊: Verh.Internat.Verein.Limnol. 29(印刷中)
• 作者: Matsui H;Sakabe M;Sakata H;Nakatani K;Ikeda K;Fukui M;Ando K;Yamagishi T;Nakajima Y;松井(八ツ橋)宏子;松井(八ツ橋)宏子;Miyake N;Miyake N;Miyake N;Shimokawa O;Matsumoto T;Takahira S;Ishiguro
• 通讯作者: Ishiguro