模拟海洋碳循环对极端二氧化碳注入事件的响应
Modeling the response of the marine carbon cycle to extreme CO$_2$ injection events
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中文总结 AI 辅助
研究海洋碳循环概念模型对碳注入方式的响应，通过单次及随机脉冲注入研究，发现单次脉冲响应阈值取决于持续时间，随机脉冲有多种响应，还识别出‘金发姑娘’区并进行测试。
中文摘要 AI 辅助
我们探究了海洋碳循环概念模型的响应如何取决于碳从大气中注入的方式。对于单次注入脉冲，可激发系统产生大响应所需的阈值量取决于脉冲持续时间而非其具体形式。不同脉冲形状在碳的大瞬态响应数量及相应响应持续时间上存在差异。受大火成岩省启发，考虑随机注入脉冲序列，发现给定注入总量和持续时间下有多种可能响应，还识别出类似共振的‘金发姑娘’区，并用西伯利亚陷阱和哥伦比亚河玄武岩群的示例场景测试了该框架。
英文摘要
We explore how the response of a conceptual model of the marine carbon cycle depends on the way in which carbon is injected from the atmosphere. We find that, for single-injection pulses, the threshold amount required for a large response of the excitable system depends on pulse duration but not on its specific form. We do, however, see differences in the number of large transient responses in carbon and, correspondingly, the duration of the response for different pulse shapes. These differences are magnified as the system is pushed towards increased excitability and can be understood in terms of the geometry of an increasingly winding heteroclinic orbit. Inspired by Large Igneous Provinces (LIPs), we also consider random sequences of injection pulses. We find a wide range of possible responses for a given overall amount injected and duration, depending on the mean characteristics of the individual pulses. We also identify a resonance-like "Goldilocks" zone, in which intermediate pulse durations or arrival frequencies produce the largest number of repeated transients, and we test the framework with illustrative scenarios motivated by the Siberian Traps and Columbia River Basalt Group.
