Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Geoid and Ellipsoid01:28

Geoid and Ellipsoid

The Earth's shape is best described as an ellipsoid, a slightly flattened sphere created by rotating an ellipse around its minor axis. This flattening results in the polar axis being about 21 kilometers shorter than the equatorial axis. In contrast, the geoid represents the Earth's gravitational shape and aligns with the mean sea level (MSL). The geoid is an irregular equipotential surface where gravity is perpendicular at every point. Variations in Earth's mass distribution cause geoid...
Tidal Forces01:06

Tidal 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.
Variation in Acceleration due to Gravity near the Earth's Surface01:20

Variation in Acceleration due to Gravity near the Earth's Surface

An object's apparent weight is its weight measured by a spring balance at its location. It is different from its true weight, the force with which the Earth pulls it, because of the Earth's rotation. Mathematically, an object's apparent weight equals its true weight minus the centripetal force that keeps it in a circular motion along with the Earth's surface every 24 hours.
The difference between the true and apparent weights is proportional to the square of the Earth's angular speed. Since the...
Apparent Weight and the Earth's Rotation01:28

Apparent Weight and the Earth's Rotation

Since all objects on the Earth's surface move through a circle every 24 hours, there must be a net centripetal force on each object, directed towards the center of that circle. The points of the north and south poles are the only exception to this rule.
For an object on the Earth's equator, the net centripetal force that accounts for its rotation is the Earth's pull towards its center, or the weight minus the normal force that prevents it from piercing into the Earth's surface. This force,...
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...
Gyroscope: Precession01:24

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Arctic freshwater forcing of the Younger Dryas cold reversal.

Nature·2005
Same author

Neoproterozoic 'snowball Earth' simulations with a coupled climate/ice-sheet model.

Nature·2000
Same author

Response.

Science (New York, N.Y.)·1995
Same author

Ice age paleotopography.

Science (New York, N.Y.)·1994
Same author

Global sea level rise and the greenhouse effect: might they be connected?

Science (New York, N.Y.)·1989

関連する実験動画

Updated: Jul 12, 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

世界の海水位と地球の自転.

W R Peltier

    Science (New York, N.Y.)
    |May 13, 1988
    PubMed
    まとめ

    世界の海水位は,年に1ミリメートル以上上昇しています. 新しいデータは,この上昇は,氷床と氷河の融解によって説明される可能性があることを示唆しています,特にバレンツ海が18,000年前に氷で覆われていた場合.

    科学分野:

    • 地質物理学 地質物理学とは地質物理学です.
    • 氷河学 氷河学とは
    • 海洋学 海洋学 海洋学

    背景:

    • 潮位計のデータは,世界の海面上昇が年間1ミリメートルを超えることを示しています.
    • 海面上昇の非恒星成分は,氷河と氷床からの質量損失に起因する可能性があります.
    • 氷床の動態を理解することは,将来の海面の変化を予測するために不可欠です.

    研究 の 目的:

    • 観測された海面上昇の原動力として,進行中の氷の質量損失の妥当性を調査する.
    • 衛星地質データを利用して,氷床の振る舞いのモデルを制約する.

    主な方法:

    • 潮位計の観測を用いた海面における長期的世俗的な変動の分析.
    • 衛星レーザーレンジング (SLR) と非常に長いベースライン干渉測定 (VLBI) データの適用.
    • 地図データ (昼間の長さ,極の移動) と氷の質量バランスシナリオの相関.

    主要な成果:

    • 海水位は,世界中で年間1ミリメートル以上の速さで上昇しています.
    • 衛星のジオデティックデータは,氷の質量損失の仮説に制約を与える.
    • マス損失仮説は,バレンツ海が最後の氷河期最大期中に重要な氷床を保持していた場合,妥当である.

    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

    Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
    08:09

    Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management

    Published on: September 12, 2017

    関連する実験動画

    Last Updated: Jul 12, 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

    Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
    08:09

    Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management

    Published on: September 12, 2017

    結論:

    • 世界の氷床と氷河からの継続的な質量損失は,観測された非恒星的な海面上昇の合理的な説明です.
    • 衛星による地質測定は,氷床の動態と海面の変化への貢献について重要な洞察を提供します.
    • バレンツ海などの過去の氷床面積の再構築は,現在の気候と海面モデルの検証に不可欠です.