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Global Climate Change01:50

Global Climate Change

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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.
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What is Climate?01:16

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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.
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There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
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When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
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Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
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Using Generative Art to Convey Past and Future Climate Transitions
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地球温暖化が1.5°Cを超えると,複数の気候変動の転換点を引き起こす可能性があります.

David I Armstrong McKay1,2,3,4, Arie Staal1,2,5, Jesse F Abrams3

  • 1Stockholm Resilience Centre, Stockholm University, Stockholm, Sweden.

Science (New York, N.Y.)
|September 8, 2022
PubMed
まとめ
この要約は機械生成です。

地球温暖化が進むにつれて 気候の臨界点や 地球システムの臨界点が 近づいてきています これらの自己永続的な変化による深刻な影響を回避するには,緊急に気候変動の緩和が必要です.

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科学分野:

  • 気候科学
  • 地球システム科学
  • 古代気候学

背景:

  • 気候の臨界点は 微小な干渉が自己永続的な 大規模な地球システムへの影響を 引き起こす重要な値を表しています
  • 工業化以前の水準より約1.1°Cの現在の地球温暖化は,いくつかの臨界点における低い不確実性の限界に近づいている.

研究 の 目的:

  • グローバル・リージョナル・ 気候の転移要素とその関連温度値の改訂された合成を提供すること.
  • パリ協定の範囲と現在の政策の軌道を含め,さまざまな地球温暖化シナリオの下での臨界点の引き起こすリスクを評価する.

主な方法:

  • 古代気候の記録を 合成した結果です
  • 観測的な気候研究から得たデータを統合する.
  • 気候モデルに基づく研究を活用する

主要な成果:

  • グローバル"コア"および地域"インパクト"のティッピング要素の改訂されたショートリストが特定されました.
  • パリ協定で定められた1.5°Cから2°Cの温暖化範囲内には,いくつかの臨界点が発生する可能性があります.
  • 現在の政策予測と一致する 2°Cから3°Cの温暖化で多くの臨界点が活性化する可能性が高い.

結論:

  • 気候変動の緊急緩和のための証拠基盤が強化されます.
  • リスク評価の改善,早期警告システム,転換点への適応戦略は極めて重要です.