Pace, magnitude, and nature of terrestrial climate change through the end-Permian extinction in southeastern Gondwana
Pace, magnitude, and nature of terrestrial climate change through the end-Permian extinction in southeastern Gondwana
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DOI：
10.1130/g48795.1
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发表时间：
2021-09-01
期刊：
影响因子：
5.8
通讯作者：
Crowley, J. L.
中科院分区：
文献类型：
--
作者：
Frank, T. D.;Fielding, C. R.;Crowley, J. L.
快速的气候变化是二叠纪末灭绝（EPE）的主要原因。虽然海洋领域受到很好的限制，但相对较少的记录记录了陆地环境中整个EPE气候变化的速度，性质和幅度。我们生成的代理记录化学风化和陆地表面温度从大陆边缘沉积的高纬度冈瓦纳东南缘。区域气候模拟提供了额外的背景。结果表明，舌羊齿森林沼泽生态系统在强烈的化学风化和峰值温暖的脉冲期间崩溃，其上限类似于100万年。逐渐变暖和季节性加剧的趋势。在低地形地貌中，植被丧失造成的侵蚀是短暂的。三叠纪早期的气候比乐平纪晚期温暖10-14摄氏度，景观不再持续潮湿。干旱化，通常与EPE，逐渐发展，促进持久的避难所的喜湿的陆地群体。
Rapid climate change was a major contributor to the end-Permian extinction (EPE). Although well constrained for the marine realm, relatively few records document the pace, nature, and magnitude of climate change across the EPE in terrestrial environments. We generated proxy records for chemical weathering and land surface temperature from continental margin deposits of the high-latitude southeastern margin of Gondwana. Regional climate simulations provide additional context. Results show that Glossopteris forest-mire ecosystems collapsed during a pulse of intense chemical weathering and peak warmth, which capped similar to 1 m.y. of gradual warming and intensification of seasonality. Erosion resulting from loss of vegetation was short lived in the low-relief landscape. Earliest Triassic climate was similar to 10-14 degrees C warmer than the late Lopingian and landscapes were no longer persistently wet. Aridification, commonly linked to the EPE, developed gradually, facilitating the persistence of refugia for moisture-loving terrestrial groups.