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气孔参数法和热力学原理是两种利用植物化石定量重建古海拔的方法。气孔参数法是基于气孔参数与大气CO2浓度的负相关性,而热力学原理则是基于热焓与海拔的负相关性。本文详细介绍这两种古海拔重建方法,并采用热力学原理,结合相关文献资料,定量重建中国山东山旺中中新世的古海拔,结果为400—1000m,高于现代山旺的250m,支持之前共存分析的研究结果。推测自中中新世以来,山旺海拔存在下降的趋势,与中国地貌演变的研究结果吻合。
Stomatal parameter method and thermodynamic principle are two methods of quantitatively reconstructing the ancient sea level using plant fossils. The stomatal parameter method is based on the negative correlation between stomatal parameters and atmospheric CO2 concentration, while the thermodynamic principle is based on the negative correlation between enthalpy and altitude. In this paper, the two methods of paleo-elevation reconstruction are introduced in detail. Based on the thermodynamics principle and relevant literature, the ancient elevation of Meso-Miocene in Shandong Province, China, is quantitatively reconstructed. The result is 400-1000m, which is higher than that of the modern Sanwang Previous coexistence analysis of the findings. It is speculated that since the Middle Miocene, there has been a downward trend in the elevation of Shanwang, which is consistent with the study on the evolution of the Chinese landscape.