関連する実験動画
Updated: Jan 3, 2026

06:10
Using Generative Art to Convey Past and Future Climate Transitions
Published on: March 31, 2023
1.4K
インド太平洋の温水池の2倍拡大は,MJOのライフサイクルを歪める
M K Roxy1,2, Panini Dasgupta3,4, Michael J McPhaden5
1Centre for Climate Change Research, Indian Institute of Tropical Meteorology, Pune, India. roxy@tropmet.res.in.
Nature
|November 29, 2019
まとめ
マッデン-ジュリアン振動 (MJO) のライフサイクルは,海洋温暖化により変化しています. そのタイミングが変化し 世界的な降雨パターンに影響を与えています
科学分野:
- 気候科学
- 大気科学
- 海洋学
背景:
- マッデン-ジュリアン振動 (MJO) は,熱帯のサブシーズン変動の主な要因である.
- MJOは,エルニーニョ,熱帯サイクロン,モンスーンなど,世界の気象パターンに影響します.
- 熱帯海は 人為的な温室効果ガスの排出により 温暖化しています
研究 の 目的:
- 熱帯海洋温暖化がMJOのライフサイクルに与える影響を調査する.
- MJOの滞在時間の変化とインド太平洋温帯との関係を分析する.
主な方法:
- 1981年から2018年までのMJOライフサイクルデータの分析
- インド洋とインド太平洋海上大陸におけるMJO滞在時間の変化の定量化
- インド太平洋温帯の拡大とMJOの変化との相関の評価
主要な成果:
- インド洋上空でのMJO滞在時間は3〜4日減少した.
- インド太平洋海域でのMJO滞在時間は5〜6日増加しました.
- インド太平洋温帯は1981年以来,著しく拡大しています.
結論:
- 海洋温暖化はMJOのライフサイクルを明らかに変えました
- MJOと暖かいプールの変化は,世界的な降雨パターンの変化と関連しています.
- 継続的な温暖化下でのMJOの将来の行動を理解するには,さらなる研究が必要です.
関連する概念動画
Global Climate Change
28.5K
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.
28.5K
Heat and Free Expansion
2.7K
The work done by a thermodynamic system depends not only on the initial and final states but also on the intermediate states—that is, on the path. Like work, when heat is added to a thermodynamic system, it undergoes a change of state, and the state attained depends on the path from the initial state to the final state. Consider an ideal gas cylinder fitted with a piston. When the cylinder is heated at a constant temperature, the gas molecules absorb energy and expand slowly in a...
2.7K
Isothermal Processes
4.7K
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...
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...
4.7K
Isochoric and Isobaric Processes
4.1K
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...
Suppose 1000 g of water is heated from 40...
4.1K
Speciation Rates
22.5K
Overview
22.5K
Population Growth
27.7K
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
27.7K

