Interaction between submesoscale flows and microscale turbulent mixing, and their impacts on nutrients supply near the Kuroshio Front

亚尺度流与微尺度湍流混合之间的相互作用及其对黑潮锋附近营养物供应的影响

• 批准号: 20710002
• 负责人: NAGAI Takeyoshi
• 金额: $ 2.66万
• 依托单位: Tokyo University of Marine Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20710002/
• 关键词: サブメソスケール; フロント; 黒潮; 乱流混合; セカンダリーフ; 舌状分布; サブダクション; 湧昇; 低塩分水; Frontogenesis; サブダクシ; マイクロストラクチャー; 黒潮前線

A series of oceanographic field campaigns has been conducted to elucidate whether the Kuroshio Front is a site of enhanced microscale turbulent dissipation, and to investigate the impacts of submesoscale phenomena on watermass formations and nutrient supply. We found that the Kuroshio Front is the site of turbulent dissipation and mixing not only in the surface mixed layer front, but also in the thermocline under the Kuroshio main stream. The results from the numerical simulations of the Kuroshio with initial conditions taken from the observations suggest that the Kuroshio Front is also a major internal wave generator. The results of nutrient sample shows that the nutrient-rich Oyashio water can be penetrated into the nutrient-poor Kuroshio water, possibly fertilizing the Kuroshio by submesoscale subduction in the surface mixed layer front of the Kuroshio.

已经进行了一系列海洋现场运动，以阐明黑杂阵阵线是否是增强微观湍流耗散的场所，并研究了对水板层层和养分供应的群尺度现象的影响。我们发现，黑发前是湍流耗散的位置，不仅在表面混合层前部，而且在黑发主流下方的热层层中混合。从观测值中获取的初始条件的数值模拟的结果表明，黑发前也是主要的内波发生器。养分样品的结果表明，可以将富含营养的Oyashio水渗透到营养贫困的黑杂质水中，这可能会通过在黑果岛的表面混合层中通过子尺度俯冲施肥。

项目成果

Mesoscale eddy-induced reduction of biological production in eastern boundary upwelling systems

东部边界上升流系统中尺度涡流引起的生物产量减少

• 期刊: submitted to Nature Geoscience
• 作者: Gruber;Lachkar;Frenzel;Marchesiello;Munnich;McWilliams;Nagai;Plattner
• 通讯作者: Plattner

Observations of Microscale Turbulent Dissipation and Submesoscale Physical and Biological Structures in the Kuroshio Front

黑潮锋微尺度湍流耗散和亚介尺度物理和生物结构的观测

• 发表时间: 2010
• 作者: 長井;Tandon;Yamazaki;Doubell;Kokubu;Gallager;York;Clayton;Holmes
• 通讯作者: Holmes

Submesoscale subduction and enhancement of chlorophyll pigments in the Kuroshio Front

黑潮前缘的亚中尺度俯冲和叶绿素色素的增强

• 作者: Nagai;Yamazaki;Katagiri;Takano
• 通讯作者: Takano

Seasonal adaptations of Daphnia pulicaria swimming behaviour: the effect of water temperature

• DOI: 10.1007/s10750-010-0540-0
• 发表时间: 2011-02
• 期刊: Hydrobiologia
• 影响因子: 2.6
• 作者: Joshua J. Ziarek;Ai Nihongi;T. Nagai;M. Uttieri;J. Rudi Strickler

Multilayer biological structure and mixing in the upper water column of Lake Biwa during summer 2008

2008年夏季琵琶湖上层水体的多层生物结构和混合

• 发表时间: 2010
• 期刊: Limnol.11(1), doi:10,1007/S10201-009-0288-2.
• 作者: H.Yamazaki;H.Honma;T.Nagai;M.Doubell;K.Amakasu;M.Kumagai
• 通讯作者: M.Kumagai