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相关概念视频

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

What is Climate?

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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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Radiation: Applications01:17

Radiation: Applications

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The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
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Precipitation Processes01:12

Precipitation Processes

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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...
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Effects of Temperature on Free Energy02:11

Effects of Temperature on Free Energy

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The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
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Factors Affecting Body Temperature01:28

Factors Affecting Body Temperature

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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.
Factors may  include:
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相关实验视频

Updated: Jun 5, 2025

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

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考虑到太平洋气候变化,预计全球变暖将增加.

Yongxiao Liang1,2, Nathan P Gillett2, Adam H Monahan1

  • 1School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia Canada.

Nature climate change
|December 16, 2024
PubMed
概括
此摘要是机器生成的。

全球变暖预测比以前认为的更加不确定. 新的方法表明,即使在低排放的情况下,气候变化可能会超过2°C,这使得气候变化减缓更加具有挑战性.

关键词:
气候和地球系统建模.预测和预测的投影和预测.

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Simulating Temperature in a Soil Incubation Experiment
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Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
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Last Updated: Jun 5, 2025

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科学领域:

  • 气候科学是气候科学.
  • 气候建模 气候建模
  • 全球变暖全球变暖.

背景情况:

  • 观测约束旨在减少气候模型预测中的不确定性.
  • 内部气候变化,特别是东部热带太平洋的"模式效应",在历史上削弱了观察到的全球变暖趋势.
  • 这种变化导致了对最近的变暖趋势的低估.

研究的目的:

  • 通过解决内部气候变化的影响来完善未来全球变暖的预测.
  • 在不同的排放场景下,重新评估在不同排放场景下超过2°C等关键变暖值的可能性.
  • 提高气候变化预测的准确性,以便更好地规划适应.

主要方法:

  • 利用观测约束方法将过去的全球变暖趋势与气候模型预测联系起来.
  • 在应用观测约束之前,通过回归来自东部热带太平洋的内部气候变异性来开发一种新的方法.
  • 应用观察到的全球平均变暖趋势作为限制,以改进未来的变暖范围.

主要成果:

  • 与以前的方法相比,这种精细的方法产生了更高,更窄的21世纪变暖范围.
  • 在低排放情景下,全球变暖现在预计可能超过2°C,这与政府间气候变化专门委员会之前的评估相反.
  • 限制全球变暖远低于2°C是一个比预期更大的挑战.

结论:

  • 内部气候变化对气候模型观测约束的可靠性产生重大影响.
  • 未来的全球变暖可能比先前估计的更严重,需要更加雄心勃勃的缓解努力.
  • 改进预测中的不确定性降低可以帮助制定更有效的气候变化适应战略.