| 项目编号: | NE/L003325/1
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| 项目名称: | Pycnocline Mixing in Shelf Seas |
| 作者: | Jeff Polton
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| 承担单位: | National Oceanography Centre
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| 批准年: | 2013
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| 开始日期: | 2014-01-04
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| 结束日期: | 2018-31-03
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| 资助金额: | GBP420969
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| 资助来源: | UK-NERC
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| 项目类别: | Research Grant
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| 国家: | UK
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| 语种: | 英语
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| 特色学科分类: | Climate & Climate Change 
; (10%)
; Marine environments 
; (50%)
; Process engineering 
; (40%)
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| 英文摘要: | The continental shelf seas provide a transition zone between estuaries and the ocean across which carbon, nutrients, sediments and contaminants are exchanged. The currents and mixing on the NW European continental shelf are dominated by the tide interacting with the sea bed, with density stratification occurring during summer months across ~80% of the region. Significant levels of biological primary production occur in these regions. However, the exchange of nutrients and carbon across these critical interfaces of stratified fluid is poorly understood and so is poorly represented in numerical models.
This project aims to compile the world's largest observational data base of shelf sea pycnocline turbulence and hydrographic measurements and to exploit state-of-the-art computer modelling and new observational technology to investigate, quantify, and parameterise the physical mechanisms and processes responsible for the fluxes across this critical interface. In particular we will develop improved understanding of pycnocline turbulence and mixing promoted by shear instability. We will test the hypothesis that these mechanisms, or interaction between mechanisms, drives pycnocline shear to levels which exceed a critical threshold beyond which there is a catastrophic loss of stability resulting in episodic mixing. Parameterisations for this mixing will be developed and tested. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/102108
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | National Oceanography Centre
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| Recommended Citation: | |
Jeff Polton. Pycnocline Mixing in Shelf Seas. 2013-01-01.
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