地球四大圈层：岩石圈、水圈、大气圈、生物圈

English

Modern earth science describes the planet as a system of four interacting spheres: the lithosphere (the solid rock of the earth’s crust and upper mantle), the hydrosphere (all the water on, above, and below the surface), the atmosphere (the layers of gas surrounding the planet), and the biosphere (all living organisms and the environments they inhabit). These four are not separate domains but continuous and mutually dependent systems: each affects and is affected by the others, and the particular combination of the four — their specific composition, their dynamic balance — is what makes Earth the only planet in the known universe capable of sustaining life as we know it. The concept of interconnected spheres has been formalized in modern Earth system science, with thinkers such as James Lovelock proposing the Gaia hypothesis — the idea that the biosphere and the physical environment co-evolve as a single, self-regulating system.

中文

现代地球科学将地球描述为四个相互作用的圈层系统：岩石圈（地壳和上地幔的固体岩石）、水圈（地表以上、以下和内部的所有水体）、大气圈（围绕地球的气体层）和生物圈（所有生物及其所栖居的环境）。这四者不是分离的领域，而是持续的、相互依存的系统：每一个都影响并被其他三个所影响，而四者的特定组合——它们的具体成分、它们的动态平衡——使地球成为已知宇宙中唯一能够维系我们所知生命的行星。现代地球系统科学将”圈层相互连接”作为核心理念，詹姆斯·洛夫洛克提出的盖亚假说更是将生物圈与物理环境视为一个共同演化的、自我调节的单一系统。

The Lithosphere: Earth’s Rocky Foundation

岩石圈：地球的岩石基础

English
The lithosphere — the rocky outer shell of the planet, comprising the crust and the rigid upper mantle — provides the physical substrate on which everything else depends. Its thickness varies considerably: approximately 70 to 190 kilometers beneath continental regions, and about 100 kilometers beneath the oceans. The continental crust itself averages about 33 kilometers in thickness, while the oceanic crust is roughly 6 kilometers thick. Its slow movements (plate tectonics) reshape continents over geological time, build mountains, open ocean basins, and cycle minerals from the deep earth to the surface. The chemical composition of surface rocks determines the composition of soils, which determines what can grow, which determines what can eat, which determines the shape of the biosphere.

中文
岩石圈 – 地球的岩石外壳，由地壳和刚性的上地幔组成 – 提供了一切其他东西所依赖的物理基质。其厚度变化很大：大陆区域约70至190公里，海洋区域约100公里。大陆地壳本身平均厚度约33公里，而海洋地壳约6公里。它的缓慢运动（板块构造）在地质时间尺度上重塑大陆，建造山脉，打开海洋盆地，并将矿物从地球深处循环到地表。地表岩石的化学成分决定土壤的成分，土壤的成分决定什么能生长，什么能生长决定什么能以之为食，这决定了生物圈的形态。

The Hydrosphere: Water’s Continuous Cycle

水圈：水的循环

English
The hydrosphere covers approximately 71% of the earth’s surface and contains 97% of the planet’s water in the oceans. The average ocean depth is about 3,794 meters. Water, in its three phases — solid ice, liquid water, gaseous vapor — mediates between the other three spheres: it erodes the lithosphere, carries nutrients to the biosphere, and drives the weather patterns of the atmosphere. The water cycle — evaporation, condensation, precipitation, runoff — is the mechanism through which the hydrosphere continuously renews itself and connects the other spheres. Water from the hydrosphere extends downward several kilometers into the lithosphere and upward about 12 kilometers into the atmosphere.

中文
水圈覆盖地球表面约71%，海洋中含有地球97%的水。海洋平均深度约3794米。水，以其三种相态——固态冰、液态水、气态水蒸气 – 在其他三个圈层之间起到中介作用：它侵蚀岩石圈，向生物圈输送养分，并驱动大气圈的天气模式。水循环 – 蒸发、凝结、降水、径流 – 是水圈不断更新自身并连接其他圈层的机制。水圈中的水向下延伸数公里进入岩石圈，向上延伸约12公里进入大气圈。

The Atmosphere: The Gaseous Envelope

大气圈：气体包层

English
The atmosphere — a thin envelope of gas, extending a few hundred kilometers above the surface — moderates temperature, distributes solar energy, and provides the oxygen that most of the biosphere requires. Its dry composition is approximately 78% nitrogen, 21% oxygen, 0.9% argon, and 0.042% carbon dioxide, with variable amounts of water vapor. Without the atmosphere’s greenhouse effect, the planet’s surface temperature would average approximately minus 18 degrees Celsius — well below the range at which liquid water can exist. The specific composition of the atmosphere, including the precise concentrations of carbon dioxide and methane, is maintained by a balance between geological processes (volcanic outgassing) and biological processes (photosynthesis, respiration) — a balance that the biosphere itself helps to regulate.

中文
大气圈 – 一层薄薄的气体包层，延伸到地表以上几百公里 – 调节温度，分配太阳能，并提供大多数生物圈所需的氧气。其干空气成分约为：氮气78%、氧气21%、氩气0.9%、二氧化碳0.042%，水蒸气含量则变化较大。没有大气圈的温室效应，地球表面温度平均约为零下18摄氏度 – 远低于液态水能够存在的范围。大气圈的特定成分，包括二氧化碳和甲烷的精确浓度，由地质过程（火山排气）和生物过程（光合作用、呼吸作用）之间的平衡维持 – 这一平衡本身由生物圈帮助调节。

The Biosphere: Life’s Domain

生物圈：生命的领域

English
The biosphere — all living organisms from deep-sea bacteria to rainforest canopies — is simultaneously the most fragile and the most chemically active of the four spheres. Its total dry biomass is estimated at approximately 1.3 × 10¹⁵ kilograms, composed roughly of 80% plant matter, 15% bacteria, and 5% all other organisms. Living organisms have transformed the composition of the other three spheres over geological time: the oxygen in the atmosphere is a product of billions of years of photosynthesis; the composition of soils is shaped by the activity of countless organisms; the chemistry of the ocean is influenced by the metabolic activity of marine life.

中文
生物圈 – 从深海细菌到热带雨林树冠的所有生物——是四个圈层中既最脆弱又最具化学活性的。其总干生物量估计约为1.3×10¹⁵公斤，其中约80%为植物、15%为细菌、其余5%为所有其他生物。生物有机体在地质时间尺度上改变了其他三个圈层的成分：大气中的氧气是数十亿年光合作用的产物；土壤的成分由无数生物的活动塑造；海洋的化学组成受到海洋生物新陈代谢活动的影响。

When Spheres Collide: Interactions Across Boundaries

圈层相遇：跨边界的相互作用

English
The four spheres are not merely adjacent — they interact constantly, and changes in one sphere often cascade through the others. A volcanic eruption (lithosphere) releases dust and gases into the atmosphere, which can reflect sunlight and cause global cooling (atmosphere), affecting evaporation rates from the oceans (hydrosphere), which in turn alters salinity and impacts marine life (biosphere). A drought (atmosphere/hydrosphere) dries out soils (lithosphere), reducing plant growth (biosphere), which in turn reduces the carbon dioxide absorbed from the atmosphere. These cascading interactions are why Earth scientists increasingly study the planet not as four separate domains but as a single, integrated system — the “Earth system” — in which the boundary between one sphere and another is often less important than the flows of energy and matter that cross them.

Human activity has now become a significant source of perturbation across all four spheres — from the carbon dioxide released by fossil fuel combustion (atmosphere) to the plastic debris accumulating in ocean currents (hydrosphere), the mining that reshapes the lithosphere, and the biodiversity loss that thins the biosphere. The planet’s four spheres are in constant, reciprocal motion; the question is whether their dynamic equilibrium can withstand the scale of the perturbation now being introduced from within the most active sphere — the biosphere’s own human branch.

中文
四大圈层不仅仅是相邻的 – 它们在不断地相互作用，一个圈层的变化常常会级联地影响其他圈层。火山喷发（岩石圈）向大气中释放尘埃和气体，这些尘埃可以反射阳光并导致全球变冷（大气圈），影响海洋的蒸发率（水圈），进而改变盐度并影响海洋生物（生物圈）。干旱（大气圈/水圈）使土壤干燥（岩石圈），减少植物生长（生物圈），进而减少从大气中吸收的二氧化碳。这些级联效应正是为什么地球科学家越来越多地将地球作为一个单一的、集成的系统 – “地球系统” – 来研究，圈层之间的边界往往不如跨越它们的能量和物质流动重要。

人类活动如今已成为横跨四大圈层的扰动源 – 从化石燃料燃烧释放的二氧化碳（大气圈），到在洋流中积累的塑料碎片（水圈），从重塑地表的采矿活动（岩石圈），到削减生物多样性的栖息地丧失（生物圈）。地球的四大圈层处在持续的、双向的互动之中；问题在于，它们的动态平衡能否承受来自最活跃圈层 – 生物圈中人类分支 – 目前正在施加的扰动规模。

The Four Spheres and the Ancient Four

四大圈层与古代之四

English
The parallel between Earth’s four spheres and the ancient frameworks — the four elements of Greek philosophy, the four divine beasts of Chinese cosmology, the four elements of Indian and Islamic traditions — is not exact, and should not be pushed too hard. The ancient frameworks were not empirical descriptions of the planet’s physical systems; they were conceptual maps of the cosmos, organized according to different principles. But the resonance is genuine: both the ancient and the modern frameworks reach for four as the number adequate to describe the fundamental structure of the world, and both treat the four components as an interacting system rather than as independent parts.

The Greek four elements — earth, water, fire, air — were systematized by Empedocles in the 5th century BCE, who argued that all matter is composed of these four basic elements, combined and separated by the forces of Love and Strife. They map loosely onto the four spheres: lithosphere (earth), hydrosphere (water), atmosphere (air), biosphere (the living fire of organic process). The Chinese four divine beasts — Azure Dragon (east/spring/wood), Vermilion Bird (south/summer/fire), White Tiger (west/autumn/metal), and Black Tortoise (north/winter/water) — provide a different kind of four-fold map: one that organizes the cosmos by direction, season, and elemental correspondence. The correspondence with the four spheres is even less direct, but the shared intuition that the world is best understood through four fundamental categories — each necessary to the others, each interacting with the others — appears across ancient philosophical traditions and in contemporary earth science.

Indian and Islamic traditions offer additional four-fold frameworks. In Indian Vedic cosmology, the universe is structured by four directions, four ages (yugas), and four varnas — all part of a cosmic order that organizes existence into recurring four-part cycles. In Islamic philosophy, the four elements (earth, water, air, fire) were inherited from the Greek tradition and integrated into a framework of divine order, with Ibn Sina and others treating elemental theory as part of the natural hierarchy that reflects the unity of creation. Whether this cross-civilizational convergence — the nearly universal reaching for four as the organizing number of cosmic structure — is a deep structural truth about the universe, or simply a cognitive preference of the human mind for organizing complexity into manageable units, is a question this compendium leaves open.

中文
地球四大圈层与古代框架 – 希腊哲学的四元素、中国宇宙论的四象、印度与伊斯兰传统的四重体系 – 之间的平行并不精确，也不应过度强调。古代框架不是对地球物理系统的经验性描述；它们是按照不同原则组织的宇宙概念地图。但这种共鸣是真实的：古代框架和现代框架都以四作为描述世界基本结构的充分数字，都将四个组成部分视为相互作用的系统而非独立部分。

希腊四元素 – 土、水、火、气 – 由恩培多克勒于公元前5世纪系统化，他认为所有物质都由这四种基本元素组成，由”爱”与”恨”两种力量驱动其组合与分离。它们松散地对应四大圈层：岩石圈（土）、水圈（水）、大气圈（气）、生物圈（有机过程的活火）。中国的四象——青龙（东/春/木）、朱雀（南/夏/火）、白虎（西/秋/金）、玄武（北/冬/水） – 提供了另一种四重地图：一种按方位、季节和五行对应关系组织的宇宙图景。它们与四大圈层的对应关系更不直接，但”世界最好通过四个基本范畴来理解 – 每个范畴对其他范畴都是必要的，每个范畴都与其他范畴相互作用” – 这一共同直觉同时出现在最古老的哲学传统和当代地球科学中。

印度和伊斯兰传统提供了其他的四重框架。在印度吠陀宇宙论中，宇宙由四方、四时代和四瓦尔纳构成 – 所有这些都属于将存在组织为不断重复的四部分周期的宇宙秩序。在伊斯兰哲学中，四元素（土、水、气、火）继承自希腊传统，并被整合进一个神圣秩序的框架中，伊本·西那等人将元素论视为反映造物统一性的自然层级的一部分。这种跨文明的趋同 – 几乎普遍地以四作为宇宙结构的组织数字 – 是宇宙的深层结构真理，还是人类心智将复杂性组织成可管理单元的一种认知偏好？这部典藏将这个问题留给读者自己思考。

Earth’s Four Spheres – The Planet as a System of Four | Great Four 地球四大圈层：岩石圈、水圈、大气圈、生物圈