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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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As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
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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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A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
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Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
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Using Generative Art to Convey Past and Future Climate Transitions
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政策不采取行动有可能违反2°C气候目标

Xiaopeng Deng1, Zhangcai Qin1, Min Chen2

  • 1School of Atmospheric Sciences, Key Laboratory of Tropical Atmosphere-Ocean System (Ministry of Education), Guangdong Province Data Center of Terrestrial and Marine Ecosystems Carbon Cycle, Sun Yat-sen University, Zhuhai, China.

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概括

全球气候承诺落后,风险1.7°C升温. 政策不采取行动扩大了差距,突出了不平等和需要国际合作来实现气候目标.

关键词:
"巴黎协定"是"巴黎协定"的一部分.气候变化 气候变化 气候变化气候承诺的承诺有一个信誉差距,一个信誉差距.缓解目标的雄心壮志.

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科学领域:

  • 气候科学 气候科学
  • 环境政策 环境政策
  • 全球经济学 全球经济学

背景情况:

  • 巴黎协定旨在限制全球变暖,但目前的国家气候承诺 (国家自主贡献) 显示出雄心壮志和行动之间的巨大差距.
  • 尽管气候承诺不断增加,但集体野心仍然不足以实现1.5°C甚至2.0°C的变暖目标.
  • 现有的全球模型表明,即使完全履行目前的承诺,也无法实现"巴黎协定"的温度目标.

研究的目的:

  • 考虑全面执行当前的气候承诺,量化剩余的全球变暖差距.
  • 评估持续的政策不作为对未来排放和变暖水平的影响.
  • 分析气候承诺实施的区域差异,并确定低收入国家面临的障碍.

主要方法:

  • 国家气候承诺与全球气候和经济模式的整合.
  • 在完全承诺实施场景下计算预计的变暖.
  • 估计由于政策不采取行动而导致的累计排放缺口 (GtCO2e).
  • 高收入和低收入国家之间的气候行动和能力的比较分析.

主要成果:

  • 预计当前气候承诺的全面实施将导致大约1.7°C的全球变暖,错过1.5°C的目标.
  • 预计持续的政策不作为将导致缓解努力累计不足505 GtCO2e.
  • 政策不采取行动进一步增加了近0.3°C的预期变暖,大大减少了保持在2.0°C以下的窗口.
  • 存在着严重的差异,高收入国家经常达到适度的目标,而低收入国家面临能力限制.

结论:

  • 各国在责任和资源方面的持续不平等正在破坏全球气候有效性.
  • 缩小野心与信誉之间的差距,迫切需要加强国际合作和财政支持.
  • 确保所有国家的可行气候行动途径对于实现全球气候目标至关重要.