当前由于全球变暖趋势不断加剧,逐渐升高的大气CO_2浓度使地球向更温暖的气候状态发展,可能在未来百年尺度内达到“温室气候”。这种气候恰好不属于人类演化过程中和当前所处的“冰室”气候状态。因此,国际科学界面临的重大科学命题就是,地球如何从冷变暖进入“温室气候”状态?变暖过程中地表环境-气候-生物体系的变化及其相互关系如何?为了深入理解这种变化,以探究“深时(Deep At present, due to the increasing global warming trend, the gradual increase of atmospheric CO 2 concentration will make the Earth develop warmer climates and may reach the ”greenhouse climate“ in the next 100 years. This climate happens to be not part of the ”icehouse“ climate in the evolution of mankind and in the present. Therefore, the major scientific proposition that the international scientific community is facing is how the earth enters the state of ”greenhouse climate" from cold to warm. The changes of the surface environment-climate-biological systems and their interrelationships during the warming process. Change to explore