Pycnocline Mixing in Shelf Seas (Pycnmix)

陆架海中的碧诺斜混合 (Pycnmix)

• 批准号: NE/L003287/1
• 负责人: Mark Inall
• 金额: $ 9.49万
• 依托单位: Scottish Association For Marine Science
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2014
• 资助国家: 英国
• 起止时间: 2014 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FL003287%2F1
• 关键词: Pycnocline; Mixing; Shelf; Seas; Pycnmix

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.

大陆架海洋在河口和海洋之间提供了一个过渡区，碳，养分，沉积物和污染物被交换。 NW欧洲大陆架上的电流和混合以与海床相互作用的潮汐相互作用，在该地区约80％的夏季，密度分层发生。在这些地区，生物初级生产的显着水平。但是，在分层流体的这些关键界面上的养分和碳的交换知之甚少，因此在数值模型中的代表很差。该项目旨在汇编世界上最大的架子海pycnocline的观察数据库 - 艺术计算机建模和新的观察技术，以调查，量化和参数化的物理机制和过程，负责该关键接口跨越通量的物理机制和过程。特别是，我们将进一步提高人们对剪切不稳定性促进的对pycnocline湍流和混合的理解。我们将检验以下假设：这些机制或机制之间的相互作用将pycnocline剪切驱动到超过临界阈值的水平，超过了稳定性的灾难性丧失，导致情节混合。将开发和测试此混合的参数化。

项目成果

Landfast Ice Controls on Turbulence in Antarctic Coastal Seas

• DOI: 10.1029/2021jc017963
• 发表时间: 2022-01-01
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
• 影响因子: 3.6
• 作者: Inall, Mark E.;Brearley, J. Alexander;Reed, Sarah
• 通讯作者: Reed, Sarah

Kilometric Scale Modeling of the North West European Shelf Seas: Exploring the Spatial and Temporal Variability of Internal Tides

• DOI: 10.1002/2017jc012960
• 发表时间: 2018-01-01
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
• 影响因子: 3.6
• 作者: Guihou, K.;Polton, J.;Holt, J.
• 通讯作者: Holt, J.

Locally modified winds regulate circulation in a semi-enclosed shelf sea

局部改变的风调节半封闭陆架海的环流

• DOI: 10.1002/essoar.10508641.2
• 发表时间: 2021
• 作者: Akpinar A

Turbulence and mixing by internal waves in the Celtic Sea determined from ocean glider microstructure measurements

• DOI: 10.1016/j.jmarsys.2014.11.005
• 发表时间: 2015-04
• 期刊: Journal of Marine Systems
• 影响因子: 2.8
• 作者: M. Palmer;G. R. Stephenson;M. Inall;C. Balfour;A. Düsterhus;J. Green

Shelf Seas Baroclinic Energy Loss: Pycnocline Mixing and Bottom Boundary Layer Dissipation

陆架海斜压能量损失：密斜混合和底部边界层耗散

• DOI: 10.1029/2020jc016528
• 发表时间: 2021
• 期刊: Oceans
• 作者: Inall M