Evaluating the relationship between the area and latitude of large igneous provinces and Earth’s long-term climate state. In Large Igneous Provinces: A Driver of Global Environmental and Biotic Changes
Evaluating the relationship between the area and latitude of large igneous provinces and Earth’s long-term climate state. In Large Igneous Provinces: A Driver of Global Environmental and Biotic Changes
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评估大型火成岩省的面积和纬度与地球长期气候状态之间的关系。
DOI：
10.1002/9781119507444.ch7
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Park, Y.
中科院分区：
文献类型：
--
作者：
Park, Y.
大型火成岩省(LIP)的假想效应之一是，随着新侵位玄武岩的硅酸盐风化增强，百万年时间尺度上的行星降温。这项研究结合重建嘴唇的原始表面范围和侵位年龄、古地理模型和嘴唇侵蚀的参数，通过显生宙估算了所有纬度带的嘴唇面积。这一分析表明，总的唇部面积和热带的唇部面积与大陆冰盖的范围没有显著的相关性。热带唇区最大的山峰是在非冰川气候的时候。这些结果表明，与嘴唇相关的行星风化能力的变化并不是地球处于冰川或非冰川气候的根本控制因素，尽管它们可能与其他过程一起提供次要的调节效应。
One of the hypothesized effects of large igneous provinces (LIPs) is planetary cooling on million‐year timescales associated with enhanced silicate weathering of freshly emplaced basalt. This study combines reconstructions of the original surface extent and emplacement ages of LIPs, a paleogeographic model, and a parameterization of LIP erosion to estimate LIP area in all latitudinal bands through the Phanerozoic. This analysis reveals no significant correlation between total LIP area, nor LIP area in the tropics, and the extent of continental ice sheets. The largest peaks in tropical LIP area are at times of non‐glacial climate. These results suggest that changes in planetary weatherability associated with LIPs are not the fundamental control on whether Earth is in a glacial or non‐glacial climate, although they could provide a secondary modulating effect in conjunction with other processes.