| 地热对海洋影响的实验室模拟 |
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| 作者姓名： | ZHOU Shengqi QU Ling ZHAO Xiaozheng WAN Wei |
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| 作者单位： | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;University of Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;University of Chinese Academy of Sciences, Beijing 100049, China |
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| 基金项目： | The National Natural Science Foundation (NSF) of China under contract Nos 41176027 and 11072253; the Strategic Priority Research Program of the Chinese Academy of Sciences under contract No. XDA11030302; the State Key Laboratory of Tropical Oceanography (LTO) grant, South China Sea Institute of Oceanography, Chinese Academy of Sciences, under contract No. LTOZZ1304. |
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| 摘 要： | This study, using laboratory experiments and scaling analysis, evaluates the influence of geothermal heating on global oceanic circulation. Upon a well-developed large-scale convective flow, an additional heat flux perturbation δF/F is employed. The increments of flow and thermal properties, including eddy diffusivity KT, flow velocity V and bottom temperature Tb, are found to be independent of the applied heat flux F. Together with the scaling analysis of convective flow at different configurations, where the flow is thermally driven in the relatively low or extremely high turbulent thermal convections or the horizontal convection, the variances of flow properties, δKT/KT and δV/V, are found to be close to 0.5% and 0.75% at δF/F=2%. This means that the small heat flux perturbation plays a negligible role in the global convective flow. However, δTb/ΔT is found to be 1.5% at δF/F=2%, which would have a significant effect in the local region. The results might provide a clue to understanding the influence of geothermal heating on global oceanic circulation. It is expected that geothermal heating will contribute less than 1% in turbulent mixing and volume flux to global oceanic circulation, so its influence can be negligible in this situation. However, when it comes to the local environment, the influence of geothermal heating cannot be ignored. For example, temperature increases of about 0.5°C with geothermal heating would have a significant effect on the physical environments within the benthic boundary layer.
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| 关 键 词： | 地热采暖 海洋环流 实验室模拟 内饰 湍流混合 温度升高 物理环境 实验室实验 |
| 收稿时间： | 4/5/2013 12:00:00 AM |
| 修稿时间： | 2014/1/23 0:00:00 |
Laboratory simulation of the influence of geothermal heating on the interior ocean |
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| ZHOU Shengqi,QU Ling,ZHAO Xiaozheng,WAN Wei.Laboratory simulation of the influence of geothermal heating on the interior ocean[J].Acta Oceanologica Sinica,2014,33(9):25-31. |
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| Authors: | ZHOU Shengqi QU Ling ZHAO Xiaozheng and WAN Wei |
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| Institution: | 1.State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China2.State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | This study, using laboratory experiments and scaling analysis, evaluates the influence of geothermal heating on global oceanic circulation. Upon a well-developed large-scale convective flow, an additional heat flux perturbation δF/F is employed. The increments of flow and thermal properties, including eddy diffusivity K T , flow velocity V and bottom temperature T b, are found to be independent of the applied heat flux F. Together with the scaling analysis of convective flow at different configurations, where the flow is thermally driven in the relatively low or extremely high turbulent thermal convections or the horizontal convection, the variances of flow properties, δK T /K T and δV/V, are found to be close to 0.5% and 0.75% at δF/F=2%. This means that the small heat flux perturbation plays a negligible role in the global convective flow. However, δT b/ΔT is found to be 1.5% at δF/F=2%, which would have a significant effect in the local region. The results might provide a clue to understanding the influence of geothermal heating on global oceanic circulation. It is expected that geothermal heating will contribute less than 1% in turbulent mixing and volume flux to global oceanic circulation, so its influence can be negligible in this situation. However, when it comes to the local environment, the influence of geothermal heating cannot be ignored. For example, temperature increases of about 0.5°C with geothermal heating would have a significant effect on the physical environments within the benthic boundary layer. |
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| Keywords: | geothermal heating oceanic circulation turbulent mixing temperature velocity |
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