新生代气候演化的间断平衡分析揭示 abrupt 转变的层级结构
A Punctuated Equilibrium Analysis of the Climate Evolution of Cenozoic exhibits a Hierarchy of Abrupt Transitions
AI总结：
本文基于间断平衡视角，结合递归分析与准势理论，对 CENOGRID 和 U1308 两个高分辨率数据集进行分析，识别并排序新生代气候的关键 abrupt 转变，揭示其 tipping points 的层级结构。
摘要：
地球气候在其历史上经历了多次临界转变，这些转变往往伴随着生物圈的大规模快速变化。这些转变在不同时间尺度的多种代用记录中均有体现。研究目标是对过去的临界转变进行识别、定年，并按重要性排序，从而可能为气候历史提供更全面的视角。为说明这一受进化论间断平衡观点启发的视角，我们分析了两个关键的高分辨率数据集：CENOGRID 海洋综合记录（过去 66 Myr）和北大西洋 U1308 记录（过去 3.3 Myr）。通过将单个时间序列的递归分析与基于准势理论的多变量系统表示相结合，我们识别出与主要体制变化相关的关键 abrupt 转变，这些转变区分了不同的气候变率簇。这使得可以将系统的时间演化解释为在动力学景观中运行的一条轨迹，其多尺度特征与 tipping points 的层级结构相关联。
英文摘要：
The Earth's climate has experienced numerous critical transitions during its history, which have often been accompanied by massive and rapid changes in the biosphere. Such transitions are evidenced in various proxy records covering different timescales. The goal is then to identify, date, and rank past critical transitions in terms of importance, thus possibly yielding a more thorough perspective on climatic history. To illustrate such an angle, which inspired the punctuated equilibrium angle on the theory of evolution, we have analyzed 2 key high-resolution datasets: the CENOGRID marine compilation (past 66 Myr), and North Atlantic U1308 record (past 3.3 Myr). By combining recurrence analysis of the individual time series with a multivariate representation of the system based on the theory of the quasi-potential, we identify the key abrupt transitions associated with major regime changes that differentiate various clusters of climate variability. This allows interpreting the time-evolution of the system as a trajectory taking place in a dynamical landscape, whose multiscale features are associated with a hierarchy of tipping points.
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