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LI Dewei (Faculty of Earth Science and Research Center of the Qinghai-Tibet Plateau, China University of Geosciences, Wuhan, Hubei 430074, China)  
Earth system dynamics closely related to earth system science and global change research deals with the structure, process, mechanism and effect of the layer-block coupling in earth system and is resulted from the high synthesis of earth dynamics, lithospheric dynamics, continental dynamics, oceanic dynamics and gas dynamics. This paper is focused on complicated earth system at different scales, different layer-block combinations, and different stages. Earth system dynamics can be classified into earth interior system dynamics, earth surface system dynamics, and earth external system dynamics based on space, and historical earth system dynamics, modern earth system dynamics, future earth system dynamics based on time, as well as gas earth system dynamics, liquid earth system dynamics, and solid earth system dynamics based on state of substance. The paper analyses the features, types, and modes for earth system coupling, and discusses the coupling boundary, motion of matter, power sources, and coupling mechanism between earth interior system and earth external system, and finally by taking the interacting multi-layers in the earth system as a whole structure, considers that radioactive heat production in the earth interior system and solar radiation heat production from the earth external system are the dominating power sources for the layer-block coupling in intricate open earth system.
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