第四纪气候演化在地球轨道力作用下的随机动力学模型

ASTOCHASTIC DYNAMICS MODEL FOR GLACIAL CLIMATE EVOLUTION DRIVEN BY EARTH ORBIT FORCES AND WHITE NOISE

本文在随机共振理论的最新发展水平基础上,综合了Milankovitch和Broeckerp等人在气候学上的贡献,全面地重新研究了Benzi和Nicolis提出的用随机共振的概念解决古气候演化的建议.我们首先在胡岗和McNamara等人发展的随机共振绝热近似理论的基础上,研究了多个周期力驱动下的非线性随机振动的可加性问题.提出了用系综平均值来描写全球气候演化问题;根据最新卫星观测数据。

Estimated the deviation of the local albedo data observed by satellitd in different latittude zones and seasons of earth surface from the global mean value over total year in the context, one finds the non-zero contribution of earth's orbit variation on tilt and precession period to the global climate change, and then establishes an energy equilibrium equation driven by the all three orbit forces combined wity stochastic force. The numerical solution of the corresponding Fokker-Planck equation presents a perfact quantitative interpretatin for the δ_(18) O record map on the main characteristics.