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関連する概念動画

Primary Production01:06

Primary Production

24.2K
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.
24.2K
Tidal Forces01:06

Tidal Forces

2.8K
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...
2.8K
What is an Ecosystem?01:17

What is an Ecosystem?

41.3K
Overview
41.3K
The Carbon Cycle01:14

The Carbon Cycle

40.4K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
40.4K
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

316
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
316
Effect of Sea Water on Concrete01:22

Effect of Sea Water on Concrete

517
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,...
517

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関連する実験動画

Updated: Sep 29, 2025

Evolution of Staircase Structures in Diffusive Convection
07:28

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Published on: September 5, 2018

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海底の山は海を揺るがす

Paul Voosen

    Science (New York, N.Y.)
    |March 24, 2022
    PubMed
    まとめ

    海底の地形は 熱と炭素を吸収するのに不可欠な 海流に影響を及ぼします 気候変動の影響を予測する鍵となるのは 水中の風景を理解することです

    科学分野:

    • 海洋学
    • 気候科学
    • 地形学

    背景:

    • 海流は地球温暖化と炭素の輸送に 重要な役割を果たしています
    • 海底の地形は,山脊やを含む,現在のダイナミクスを大幅に変更することができます.
    • 以前の研究では 海洋循環パターンの バチメトリーの重要性を強調しています

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    Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
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    Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities
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    Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities
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