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関連する概念動画

What is Climate?01:16

What is Climate?

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
Global Climate Change01:50

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
Precipitation Processes01:12

Precipitation Processes

The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
Variation of Atmospheric Pressure01:18

Variation of Atmospheric Pressure

Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...
Boundary Layer Characteristics01:18

Boundary Layer Characteristics

When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...

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関連する実験動画

Updated: May 27, 2026

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
10:28

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Published on: June 13, 2020

大気圏の遮断と,大西洋の数十年にわたる海洋の変動.

Sirpa Häkkinen1, Peter B Rhines, Denise L Worthen

  • 1National Aeronautics and Space Administration (NASA) Goddard Space Flight Center, Code 615, Greenbelt, MD 20771, USA. sirpa.hakkinen@nasa.gov

Science (New York, N.Y.)
|November 5, 2011
PubMed
まとめ
この要約は機械生成です。

北大西洋における大気阻害現象は,海洋循環に影響を与え,温暖で塩分が高い亜極海の形成につながります. この関連は,過去の温暖化傾向を含む,長期の海洋変動を説明する.

さらに関連する動画

Using Generative Art to Convey Past and Future Climate Transitions
06:10

Using Generative Art to Convey Past and Future Climate Transitions

Published on: March 31, 2023

関連する実験動画

Last Updated: May 27, 2026

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
10:28

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Published on: June 13, 2020

Using Generative Art to Convey Past and Future Climate Transitions
06:10

Using Generative Art to Convey Past and Future Climate Transitions

Published on: March 31, 2023

科学分野:

  • 気候学と海洋学
  • 大気科学 大気科学
  • 海洋-大気相互作用

背景:

  • 大気遮断は,大気圏の広い地域を,長期間 (≥5日) にわたって風力から隔離します.
  • これらのブロックイベントは,北大西洋の風のパターンに大きく影響し,その結果,海洋の循環と性質に影響します.

研究 の 目的:

  • 北大西洋における大気遮断と海洋循環と特性の関係を調査する.
  • 大気圏の遮断が観測された海洋温暖化と塩分パターンの説明であるかどうかを決定し,その中には10年単位および複数十年単位での変動性が含まれています.

主な方法:

  • 北大西洋北部の大気遮断周波数と位置の分析.
  • ブロックイベントと海洋学的データとの相関関係,亜極海の温度と塩分度に焦点を当てた.
  • 遮断されたシステムに関連した風力強制の検討と,海洋の回転と熱交換への影響.

主要な成果:

  • グリーンランドと西欧の間の頻繁な大気遮断クラスターは,より暖かく,より塩分のある亜極海条件に対応します.
  • この相関は,最近の10年期 (例えば,1996-2010年) とより長い時間スケールで明らかです.
  • 遮断された状態から強風が押し寄せてくるので,海洋の回転と熱交換が弱まり,大西洋多年周期変動 (AMV) の温暖化期に寄与する.

結論:

  • 大気阻害は北大西洋の変動の主要な要因であり,短期的および長期的気候パターンの両方に影響を与えます.
  • この研究は,遮断された風と暖かい海洋状態の間の関連性を確認し,20世紀半ばの温室効果ガスの温暖化以前の現象のような現象を説明しています.
  • これらの海洋と大気間の相互作用を理解することは,将来の気候変動と海洋の行動を予測するために極めて重要です.