海洋科学.海洋科学. 增强:内部潮和海洋混合
1Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8W 3P6, Canada. garrett@uvphys.phys.uvic.ca
Science (New York, N.Y.)
|September 27, 2003
概括
由海底地形驱动的海洋内部潮将潮能量转移到深海. 这个过程会产生流,影响海洋的混合,循环和海洋生态系统.
科学领域:
- 海洋学 海洋学 海洋学
- 地质物理学 地质物理学
- 气候科学 气候科学
背景情况:
- 海洋潮将大量的能量转移到海底内部的潮.
- 内部潮是带有潮周期的波浪,通过海洋的密度分层传播.
研究的目的:
- 解释内部潮的产生和影响.
- 突出内部潮在海洋混合和循环中的作用.
主要方法:
- 分析卫星和实地观测.
- 解释波浪传播和能量传递机制.
主要成果:
- 内部的潮分解成流,导致深海中的大量混合.
- 这种混合影响了海洋分层和全球海洋循环模式.
结论:
- 内部潮在调节海洋属性和过程中起着至关重要的作用.
- 内部潮的能量来源于地球月球系统的旋转能量.
- 了解内部潮对于预测气候和生物生产至关重要.
相关概念视频
01:06Primary Production
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
01:06Tidal Forces
The origin of Earth's ocean tides has been a subject of continuous investigation for over 2000 years. However, the work of Newton is considered to be the beginning of the proper understanding of the phenomenon. Ocean tides are the result of gravitational tidal forces. These same tidal forces are present in any astronomical body; they are responsible for the internal heat that creates the volcanic activity on Io, one of Jupiter's moons, and the breakup of stars that get too close to black holes.
01:22Effect of Sea Water on Concrete
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks, which undergo...
Concrete in areas between tide marks, which undergo...
01:11Buoyancy and Stability for Submerged and Floating Bodies
In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
01:30Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
01:18Deep Sea Microbial Ecology
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...