The Late Paleozoic Ice Age: An Evolving Paradigm
The Late Paleozoic Ice Age: An Evolving Paradigm
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DOI：
10.1146/annurev.earth.031208.100118
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发表时间：
2013-06
影响因子：
14.9
通讯作者：
I. Montañez;C. Poulsen
中科院分区：
文献类型：
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作者：
I. Montañez;C. Poulsen
晚古生代冰室是古生代最长寿的冰河时代，它的消亡构成了唯一有记录的温室状态的转变。这篇综述总结了盘古大陆大陆冰的时间，范围和行为的证据，以及气候和生态系统对冰期和间冰期条件之间反复转换的反应。结合经验和气候模拟研究认为，一个动态的冰河时代的特点是离散的冰川期间隔的冰收缩期在间歇性变暖，中等大小的冰盖从多个冰中心在整个冈瓦纳南部，可能的冰川北方半球，和大气中的CO2作为一个主要的驱动程序的冰盖和气候变化。冰川海平面变化对这些较小冰盖波动的反应可能不像以前认为的那么极端。模拟研究、地层关系以及海洋动物和陆地植物群的地理格局和群落组成的变化表明，海洋环流和低纬度气候对高纬度冰川条件的反应可能很强。这些联系的强迫和反馈，以及现有的气候矛盾，确定了晚古生代未来研究的目标。
The late Paleozoic icehouse was the longest-lived ice age of the Phanerozoic, and its demise constitutes the only recorded turnover to a greenhouse state. This review summarizes evidence for the timing, extent, and behavior of continental ice on Pangea in addition to the climate and ecosystem response to repeated transitions between glacial and interglacial conditions. Combined empirical and climate modeling studies argue for a dynamic ice age characterized by discrete periods of glaciation separated by periods of ice contraction during intermittent warmings, moderate-size ice sheets emanating from multiple ice centers throughout southern Gondwana, possible glaciation of the Northern Hemisphere, and atmospheric CO2 as a primary driver of both ice sheet and climate variability. The glacioeustatic response to fluctuations of these smaller ice sheets was likely less extreme than previously suggested. Modeling studies, stratigraphic relationships, and changes in both the geographic patterns and community compositions of marine fauna and terrestrial flora indicate the potential for strong responses to high-latitude glacial conditions in both ocean circulation and low-latitude climate. The forcings and feedbacks of these linkages, as well as existing climate paradoxes, define research targets for future studies of the late Paleozoic.