| Energetics of lateral eddy diffusion/advection：Part Ⅰ. Thermodynamics and energetics of vertical eddy diffusion |
| |
| 引用本文： | HUANG Rui Xin. Energetics of lateral eddy diffusion/advection：Part Ⅰ. Thermodynamics and energetics of vertical eddy diffusion[J]. 海洋学报(英文版), 2014, 33(3): 1-18. DOI: 10.1007/s13131-014-0409-6 |
| |
| 作者姓名： | HUANG Rui Xin |
| |
| 作者单位： | Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole 02543-1050, USA |
| |
| 摘 要： | Two important nonlinear properties of seawater thermodynamics linked to changes of water density, cabbeling and elasticity(compressibility), are discussed. Eddy diffusion and advection lead to changes in density; as a result, gravitational potential energy of the system is changed. Therefore, cabbeling and elasticity play key roles in the energetics of lateral eddy diffusion and advection. Vertical eddy diffusion is one of the key elements in the mechanical energy balance of the global oceans. Vertical eddy diffusion can be conceptually separated into two steps: stirring and subscale diffusion. Vertical eddy stirring pushes cold/dense water upward and warm/light water downward; thus, gravitational potential energy is increased. During the second steps, water masses from different places mix through subscale diffusion, and water density is increased due to cabbeling. Using WOA01 climatology and assuming the vertical eddy diffusivity is equal to a constant value of 2×103 Pa2/s, the total amount of gravitational potential energy increase due to vertical stirring in the world oceans is estimated at 263 GW. Cabbeling associated with vertical subscale diffusion is a sink of gravitational potential energy, and the total value of energy lost is estimated at 73 GW. Therefore, the net source of gravitational potential energy due to vertical eddy diffusion for the world oceans is estimated at 189 GW.
|
| 关 键 词： | 涡流扩散 热力学 能量学 垂直 涡动 对流 重力势能 全球海洋 |
| 收稿时间： | 2013-08-30 |
| 修稿时间： | 2013-12-17 |
Energetics of lateral eddy diffusion/advection: Part I. Thermodynamics and energetics of vertical eddy diffusion |
| |
| HUANG Rui Xin. Energetics of lateral eddy diffusion/advection: Part I. Thermodynamics and energetics of vertical eddy diffusion[J]. Acta Oceanologica Sinica, 2014, 33(3): 1-18. DOI: 10.1007/s13131-014-0409-6 |
| |
| Authors: | HUANG Rui Xin |
| |
| Affiliation: | Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole 02543-1050, USA |
| |
| Abstract: | Two important nonlinear properties of seawater thermodynamics linked to changes of water density, cabbeling and elasticity (compressibility), are discussed. Eddy diffusion and advection lead to changes in density;as a result, gravitational potential energy of the system is changed. Therefore, cabbeling and elasticity play key roles in the energetics of lateral eddy diffusion and advection. Vertical eddy diffusion is one of the key elements in the mechanical energy balance of the global oceans. Vertical eddy diffusion can be conceptually separated into two steps: stirring and subscale diffusion. Vertical eddy stirring pushes cold/dense water upward and warm/light water downward;thus, gravitational potential energy is increased. During the second steps, water masses from different places mix through subscale diffusion, and water density is increased due to cabbeling. Using WOA01 climatology and assuming the vertical eddy diffusivity is equal to a constant value of 2×103 Pa2/s, the total amount of gravitational potential energy increase due to vertical stirring in the world oceans is estimated at 263 GW. Cabbeling associated with vertical subscale diffusion is a sink of gravitational potential energy, and the total value of energy lost is estimated at 73 GW. Therefore, the net source of gravitational potential energy due to vertical eddy diffusion for the world oceans is estimated at 189 GW. |
| |
| Keywords: | cabbeling compressibility elasticity energetics of vertical eddy diffusion gravitational potential energy parameterization of eddy diffusion |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
|
点击此处可从《海洋学报(英文版)》下载全文 |
