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関連する概念動画

Buoyancy01:12

Buoyancy

When an object is placed in a fluid, it either floats or sinks. All objects in a fluid experience a buoyant force. For example, a metal ball sinks, while a rubber ball floats. Similarly, a submarine can sink and float by adjusting its buoyancy.  The concept of buoyancy raises several interesting questions. For instance, where does this buoyant force come from? How much buoyant force is required to make an object sink or float? Do objects that sink get any support at all from the fluid? 
To get...
Density and Archimedes' Principle01:05

Density and Archimedes' Principle

When a lump of clay is dropped into water, it sinks. But if the same lump of clay is molded into the shape of a boat, it starts to float. Because of its shape, the clay boat displaces more water than the lump and experiences a greater buoyant force, even though its mass is the same. The same holds true for steel ships. The average density of an object majorly determines if the object will float. If an object's average density is less than that of the surrounding fluid, it will float. The reason...
Buoyancy and Stability for Submerged and Floating Bodies01:11

Buoyancy 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...
Applications of Integration to Find Hydrostatic Pressure01:30

Applications of Integration to Find Hydrostatic Pressure

Hydrostatic force is a fluid's total force at rest on a surface. For a horizontal surface submerged at a fixed depth, the pressure is constant and calculated as the product of fluid density, gravitational acceleration, and depth. In the case of a vertical dam wall submerged in water, this force is not evenly distributed due to the increasing pressure with depth. This variation arises from the cumulative weight of the water above each point. Integration is used to account for the continuous...
Marine Microbial Ecology01:30

Marine 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...
Deep Sea Microbial Ecology01:18

Deep 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...

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関連する実験動画

Updated: Jun 19, 2026

An Ultra-clean Multilayer Apparatus for Collecting Size Fractionated Marine Plankton and Suspended Particles
09:01

An Ultra-clean Multilayer Apparatus for Collecting Size Fractionated Marine Plankton and Suspended Particles

Published on: April 19, 2018

海洋学. 海洋学. 海洋における垂直混合は,海洋における垂直混合である.

D J Webb1, N Suginohara

  • 1Southampton Oceanography Centre, Empress Dock, Southampton SO14 3ZH, UK. david.webb@soc.soton.ac.uk

Nature
|May 9, 2001
PubMed
まとめ
この要約は機械生成です。

この研究は,海洋熱ハリン循環の見直しを行い,南大洋がより多く上流し,水細胞を分離することを示唆しています. これにより,深海の混合に必要なエネルギーが減少します.

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Evolution of Staircase Structures in Diffusive Convection
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Evolution of Staircase Structures in Diffusive Convection

Published on: September 5, 2018

Visualizing Oceanographic Data to Depict Long-term Changes in Phytoplankton
08:15

Visualizing Oceanographic Data to Depict Long-term Changes in Phytoplankton

Published on: July 28, 2023

関連する実験動画

Last Updated: Jun 19, 2026

An Ultra-clean Multilayer Apparatus for Collecting Size Fractionated Marine Plankton and Suspended Particles
09:01

An Ultra-clean Multilayer Apparatus for Collecting Size Fractionated Marine Plankton and Suspended Particles

Published on: April 19, 2018

Evolution of Staircase Structures in Diffusive Convection
07:28

Evolution of Staircase Structures in Diffusive Convection

Published on: September 5, 2018

Visualizing Oceanographic Data to Depict Long-term Changes in Phytoplankton
08:15

Visualizing Oceanographic Data to Depict Long-term Changes in Phytoplankton

Published on: July 28, 2023

科学分野:

  • 海洋学 海洋学とは
  • 気候科学 気候科学
  • 地質物理学 地質物理学とは地質物理学です.

背景:

  • 海洋の熱ハリン循環は,密度の違いによって引き起こされ,主に極地における冷たい塩水の沈没によって引き起こされます.
  • 水を表面に戻すのに不可欠な深海の上流は,しばしば内部波の破裂に起因する.
  • 理論的モデルと観測データには,深海における垂直混合の範囲に関する不一致がある.

研究 の 目的:

  • 深海の垂直混合の理論的および観察的推定を調和させるため.
  • 熱ハリン循環の改訂モデルを提示する.
  • 深海混合のエネルギー需要を調査する.

主な方法:

  • 既存の海洋学データと理論モデルの分析.
  • 海洋循環のための改訂された概念モデルの開発.
  • 異なる循環シナリオにおけるエネルギー消耗の推定値の比較.

主要な成果:

  • 改訂されたモデルは,南大洋の重要な上昇を考慮しています.
  • 北大西洋の深水細胞は,現在,南極の底水細胞とは分離していると考えられています.
  • 改訂された循環モデルは,以前考えられていたよりも,海底の消去のために,風と潮のエネルギーがかなり少ないことを要求します.

結論:

  • 提案された改訂は,熱ハリン循環のより正確な表現を提供します.
  • この改訂された理解は,世界の海洋エネルギー予算に影響を及ぼします.
  • これらの発見を包括的な観察データで検証するためにさらなる研究が必要である.