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海洋生态系统在建立工业化前和未来气候中的作用

Jerry F Tjiputra¹, Damien Couespel², Richard Sanders²

¹NORCE Norwegian Research Centre AS, Bjerknes Centre for Climate Research, Bergen, Norway. jetj@norceresearch.no.

Nature communications

|March 5, 2025

概括

海洋的海洋海洋的海洋.

科学领域:

地球系统科学地球系统科学
海洋学海洋学海洋学
气候科学是气候科学.

背景情况:

海洋是全球碳循环的关键组成部分,影响大气二氧化碳水平.
当前的模型往往简化了复杂的陆海反机制.
了解海洋生物学的作用对于准确的气候预测至关重要.

研究的目的:

研究海洋生物学在调节大气中的二氧化碳中的复杂作用.
评估关闭海洋生物对全球碳水平的影响.
在地球系统建模中探索结合的陆海反.

主要方法:

利用互动的地球系统模型来模拟碳循环中的变化.
在关闭海洋的生物后,分析了大气二氧化碳的新平衡状态.
该模型的海洋和陆地组成部分之间的量化碳交换.

主要成果:

当海洋的生物关闭时,大气中的二氧化碳增加了50%以上 (163ppm).
大约一半从海洋释放的碳被陆地吸收.
由于变暖和变化的表面条件,非生物海洋对人为碳吸收能力有所降低.

结论:

海洋生物学在碳捕获中扮演的角色比以前理解的要复杂得多.
陆地-海洋反显著影响大气二氧化碳对海洋生态系统变化的反应.
保护海洋生态系统的功能对于减缓气候变化的努力至关重要.

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相关概念视频

Global Climate Change

Global Climate Change

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.

What is Climate?

What is Climate?

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.

What is an Ecosystem?

What is an Ecosystem?

Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

The Carbon Cycle

The Carbon Cycle

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.

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.