论文部分内容阅读
地球在晚古生代晚期—中生代早期经历最近一次从冰室到温室的气候转变,是理解未来地球冰川消融、全球变暖等气候转变的重要窗口。这一时期的沉积记录和气候模型研究揭示,冰川活动、大气pCO_2和气候状态间存在复杂的耦合和反馈机制,同时伴随发生陆表植被更替和生物迁移。随冰川消融、大气pCO_2升高和全球变暖,低纬大陆区干旱化趋势和季节性降雨增强,出现季风气候并在冰室之后的三叠纪温室盛行。华南和华北是位于东特提斯低纬区的主要大陆,其石炭—二叠系在沉积和生物特征上与Pangea超大陆西侧热带区差异显著,蕴含有丰富的深时气候变化信息。基于前人成果,在简述石炭—三叠纪全球气候变化的基础上,对东特提斯低纬区石炭—三叠纪沉积记录进行总结,阐明其深时古气候研究意义和研究前景。
In the late Late Paleozoic-the Early Mesozoic, the Earth underwent the most recent climate change from icehouse to greenhouse. It is an important window for understanding climate change such as glacier melting and global warming in the future. Sedimentary records and climate models during this period reveal that there is a complex coupling and feedback mechanism between glacier activity, atmospheric pCO 2 and climate status, accompanied by the occurrence of land surface vegetation replacement and biological migration. With the melting of glaciers, increasing of atmospheric pCO_2 and global warming, the aridification of the continental latitudes in the low latitudes and the seasonal precipitation increase. The monsoon climate appears and prevails in the Triassic greenhouses after the ice chamber. South China and North China are the main continents located in the low latitude of Eastern Tethys. Their Carboniferous-Permian sediments and biometrics are significantly different from the tropical regions of the western Pangea supercontinent and contain rich information on deep-seated climate change. Based on the previous achievements, based on a brief description of the Carboniferous-Triassic global climate change, the sedimentary records of the Carboniferous and Triassic in the low latitude of Eastern Tethys are summarized, and the significance and research prospects of the paleoclimate research in the deep are illuminated.