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相关概念视频

Global Climate Change01:50

Global Climate Change

24.4K
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 Weather?01:07

What is Weather?

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Overview
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Heating and Cooling Curves02:44

Heating and Cooling Curves

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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.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
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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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Thermometers and Temperature Scales01:22

Thermometers and Temperature Scales

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Any physical property that depends consistently and reproducibly on temperature can be used as the basis of a thermometer. For example, volume increases with temperature for most substances. This property is the basis for the common alcohol thermometer and the original mercury thermometers. Other properties used to measure temperature include electrical resistance, color, and the emission of infrared radiation.
As many physical properties depend on temperature, the variety of thermometers is...
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Temperature Measurement Sites01:14

Temperature Measurement Sites

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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相关实验视频

Updated: Jul 4, 2025

Using Generative Art to Convey Past and Future Climate Transitions
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Using Generative Art to Convey Past and Future Climate Transitions

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历史和未来的最大海面温度.

B B Cael1, Friedrich A Burger2,3, Stephanie A Henson1

  • 1National Oceanography Centre, Southampton, UK.

Science advances
|January 26, 2024
PubMed
概括

海洋热浪正在增加. 这项研究使用卫星数据验证了地球系统模型,证实了它们在预测未来海洋热浪和海洋变暖趋势方面的可靠性.

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Thermal Limits Determination for Zooplankton Using a Heat Block

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科学领域:

  • 海洋学 海洋学 海洋学
  • 气候科学 气候科学
  • 极端天气事件 极端天气事件

背景情况:

  • 海洋热浪 (MHWs) 显著影响海洋生态系统.
  • 预计MHW的频率和强度将增加.
  • 地球系统模型在模拟 MHW 的准确性是不确定的.

研究的目的:

  • 量化评估地球系统模型能够复制观测到的极端海面温度 (SST) 统计数据的能力.
  • 通过与卫星观测对模型性能进行验证,建立对未来MHW预测的信心.
  • 量化海洋最大温度的预测变化.

主要方法:

  • 利用了39年全球卫星观测每日平均SST异常的39年.
  • 应用了通用的极端值分布来分析每年最大的SST异常.
  • 将观察到的SST极值分布与14个合模型对比项目第6阶段 (CMIP6) 模型的历史模拟进行了比较.

主要成果:

  • 观察到的SST异常很好地与一般化极端值分布保持一致.
  • CMIP6模型成功地重现了SST极端的观察到的分布和空间模式.
  • 预计最大海洋温度的增加为1.07° ± 0.17°C (2°C升温) 和2.04° ± 0.18°C (3.2°C升温).

结论:

  • 该研究验证了CMIP6模型用于预测MHWs的可靠性.
  • 海洋最大温度的上升主要是由上升的平均SST驱动的,SST季节性变化的贡献很小.
  • 这项研究提供了对海洋温度极端的关键定量见解,并增强了对MHWs气候模型预测的信心.