地球系统演化原因研究的回顾与展望

简略回顾了地球系统的研究历史,指出人类数千年来关于地球系统的研究可分为古代、大分化和大融合 3个阶段,提出"地球系统学"在今后相当一段时间内将是地学研究的主流。第二部分探索地球系统演化的原因,指出："热"是影响地球系统的途径,但地表面受热的准周期性变化不应是整个地球系统演化的主要原因;对于各种引力的准周期性变化对气候变化的影响,归纳出这样一条可能的途径：天体引力→地核环流变化→通过地幔热柱影响软流圈波动变化→通过地热影响气候变化;宇宙磁场通过"变压器效应"调制地核中的Lorenz力,使地核环流变化,进而影响地球系统演化。第三部分提出"外核环流是主导地表系统演化的总枢纽"假说。最后指出：一定要从宇地相互作用中寻求地球系统演化的原因;宇地之间相互联系的热、力和电磁三种物理过程中,"磁"是最值得予以关注的;核幔边界层很可能是推动地核环流和地幔对流的能源区。

REVIEW AND PROSPECT OF THE RESEARCH OF EARTH SYSTEM' S EVOLUTION

The research history of Earth system can be divided into three stages:Ancient, Great Divide and Great Syncretic stages, and that the Earth System Science will be the mainstream in Earth science research for a long time. In the second section of this paper, the authors search after the reasons of the evolution of Earth system. The results show that "heat" is one of the reasons for the evolution of Earth system, but not the most important one; the impact of gravitation on climatic change can be showed as follows: spherical gravitations-the change of core circulation influences fluctuation of soft flowing sphere by the "hot plume" of Mantle-the effects on climatic change of terrestrial heat; cosmic magnetic field adjusts the Lorenz in centrosphere by "transformer effect", which influences the evolution of the Earth system. In the third section, the authors point out that out-core circulation is the key factor for leading to the evolution of the Earth system; among heat, force and electromagnetism, the electromagnetism is the most significant factor; the boundary layer between the core and Mantle may be the energy sources to drive the core circulation and Mantle convection.