Energy Security: Supply-Demand Dynamics and Geopolitics | 能源安全：供需格局与地缘政治

📚 Energy Security: Supply-Demand Dynamics and Geopolitics | 能源安全：供需格局与地缘政治

Energy security is a central theme in human and physical geography, bridging resource distribution, economic interdependence, and international relations. It concerns how states secure reliable and affordable energy supplies when resources are unevenly distributed, demand centres shift, and the geopolitical environment is volatile.

能源安全是人文地理与自然地理中的核心主题，它将资源分布、经济相互依赖与国际关系联系在一起。它关注的是：在资源分布不均、需求中心转移和地缘政治环境动荡的情况下，国家如何保障可靠且可负担的能源供应。

1. Defining Energy Security | 能源安全的定义

The International Energy Agency defines energy security as the uninterrupted availability of energy sources at an affordable price. In academic geography, this is often expanded into four dimensions known as the ‘4 As’: availability, accessibility, affordability, and acceptability.

国际能源署将能源安全定义为以可负担的价格不间断地获取能源。在地理学界，这一概念通常被扩展为四个维度，即“4A”：可获得性、可获得性、可负担性和可接受性。

Availability refers to the physical existence of sufficient reserves or supply. Accessibility concerns whether these resources can be physically delivered through infrastructure, trade routes, and political borders. Affordability means that energy prices remain stable and within the reach of households and industries. Acceptability involves the environmental and social legitimacy of energy sources.

可获得性指是否存在充足的资源储备或供应。可获得性关注资源能否通过基础设施、贸易路线和政治边界实现实体交付。可负担性意味着能源价格保持稳定，并在家庭和工业可承受范围之内。可接受性则涉及能源来源的环境与社会合法性。

Energy security also contains a temporal dimension: short-term security deals with sudden supply shocks such as wars, strikes, or cyber-attacks, while long-term security involves investment, technology development, and structural shifts in the energy mix.

能源安全还具有时间维度：短期安全应对战争、罢工或网络攻击等突发供应冲击，而长期安全则涉及投资、技术发展以及能源结构的结构性转变。

2. Global Energy Supply-Demand Landscape | 全球能源供需格局

Global primary energy demand has grown from about 270 exajoules (EJ) in 1971 to roughly 620 EJ in 2023. Fossil fuels — oil, coal, and natural gas — still supply over 80% of total energy, although their share is slowly declining due to renewable energy expansion.

全球一次能源需求已从1971年的约270艾焦耳增长至2023年的约

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