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関連する概念動画

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.
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.
Microbes and Climate Change01:27

Microbes and Climate Change

Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added together...
Isochoric and Isobaric Processes01:21

Isochoric and Isobaric Processes

A thermodynamic process that occurs at constant volume is called an isochoric process. According to the first law of thermodynamics, heat supplied or removed from the system is partially utilized to perform work and change the internal energy of the system. However, in an isochoric process, the volume remains constant. Hence, the work done by the system is zero. Therefore, the exchange of heat changes the internal energy of the system only. 
Suppose 1000 g of water is heated from 40 degrees...
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

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. Over a...

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関連する実験動画

Updated: Jul 9, 2026

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

パンゲアの再構築と基本的な気候制御の間の矛盾

Clinton M Rowe1, David B Loope, Robert J Oglesby

  • 1Department of Geosciences, University of Nebraska, Lincoln, NE 68588-0340, USA. crowe1@unl.edu

Science (New York, N.Y.)
|November 24, 2007
PubMed
まとめ

パンゲアの古磁気データ

科学分野:

  • 古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは
  • パレオジオグラフィー パレオジオグラフィー
  • 堆積物学 堆積物学 堆積物学 堆積物学 堆積物学

背景:

  • パンゲアという超大陸は,ペルム紀からジュラ紀まで存在した.
  • パレオマグネティック再構築は,パンゲアの緯度位置を1億年以上にわたって推定しています.
  • アメリカ南西部のエオリア砂岩は,大気循環パターンを記録しています.

研究 の 目的:

  • パンゲアの古磁気再構築と大気循環データとの不一致を調和させるため.
  • ジュラ紀初期におけるパンゲアの古磁気緯度推定の正確性を調査する.
  • パンゲアの存在期間の風のパターンの制御を理解するために.

主な方法:

  • パンゲアの位置を再構築するために,古磁気データを活用する.
  • 過去の風向きを推測するために,エオリアン砂岩の形成を分析する.
  • 推論された風のパターンを古磁気緯度推定値と比較する.

主要な成果:

  • 大気循環データによると,北では北東風が吹いて,南では北西に曲がっている.

関連する実験動画

Last Updated: Jul 9, 2026

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

  • この風のパターンは,ペルミア初期に赤道を横断するパンゲアと一致しています.
  • 観測された風のパターンは,ジュラ紀初期までにパンゲアが北方20度まで北へ漂っていたと推定されているものと矛盾しています.

    • 結論:

    • 古代磁気再構築と,ジュラ紀初期パンゲアの大気循環の証拠の間に,重大な不一致がある.
    • 潜在的な説明には,古磁気データの不正確さ,砂丘形成の誤った解釈,異なるジュラ紀の気候制御,または不十分な古地理学的再構築が含まれます.
    • これらの矛盾するデータセットを解決し,パンゲアの古地理と気候を正確にモデル化するために,さらなる研究が必要です.