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関連する概念動画

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...
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.
Isothermal Processes01:21

Isothermal Processes

A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
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...
Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...

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関連する実験動画

Updated: May 30, 2026

Simulating Impacts of Ice Storms on Forest Ecosystems
06:27

Simulating Impacts of Ice Storms on Forest Ecosystems

Published on: June 30, 2020

氷期・氷期間のインド夏季モンスーンの動態

Zhisheng An1, Steven C Clemens, Ji Shen

  • 1State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China. anzs@loess.llqg.ac.cn

Science (New York, N.Y.)
|August 6, 2011
PubMed
まとめ

インドの夏季モンスーン (ISM) は,両半球の影響を受けます. 南半球の冷却は,氷の量だけでなく,氷河期と氷河期間のモンスーンのシフトを駆動し,過去の気候変動を説明しています.

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 30, 2026

Simulating Impacts of Ice Storms on Forest Ecosystems
06:27

Simulating Impacts of Ice Storms on Forest Ecosystems

Published on: June 30, 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:

  • 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
  • 大気科学 大気科学
  • 地球システム科学 地球システム科学

背景:

  • インドの夏季モンスーン (ISM) は,北半球と南半球の両方のプロセスがその変動性に与える影響を強調して,強力な半球間輸送を示しています.
  • ISMの変動の要因を理解することは,将来の気候パターンを予測する上で極めて重要です.

研究 の 目的:

  • 氷河期と氷河期間の時間スケールにおけるインド夏季風 (ISM) に及ぼす半球間強制力の役割を調査する.
  • 過去ISMの動態を再構築するために,中国南西部の高解像度大陸古気候記録を分析する.

主な方法:

  • 中国南西部の大陸の古気候記録の高解像度分析.
  • 古代気候データと地球上の氷の量,南北半球の気候指標との相関.
  • パレオ大気圧グラデーションの再構築.

主要な成果:

  • 氷期間のISMマキシマムは,地球上の氷の量最小値と,インドの低気温上昇と相関しています.
  • 氷河のISM最小値は,世界の氷の量ピークの前に発生し,早期増加が観察されています.
  • 南半球の高緯度冷却によって引き起こされる,赤道横断圧差の増加は,重要な要因として特定されています.

結論:

  • 半球間強制は,氷河期と氷河期間の時間スケールにおけるISMの変動性に大きく影響する.
  • 南半球の高緯度の冷却は,特に氷河期におけるISMの変化を促す上で重要な役割を果たしています.
  • 提案されたメカニズムは,プレイストセンのISM記録における実質的な非軌道スケールバリエーションを説明する.