论文部分内容阅读
全球变化是地球各圈层相互作用与反馈的结果。它包括了数千至数百万年的地球长期演变,也包括大气、海洋的瞬息变化。但是,作为全球研究的焦点,还是与人类生存息息相关的数十至数百年的全球环境变化。它主要指的是动力气候系统和生物地球化学循环。前者控制着地表温度和降水的大气、海洋过程;后者为生命基础的化学元素(C、N、P、S)在地球系统中的运动。这两个子系统是密切关联的,并受到人类活动的影响。 先进的遥感技术为全球研究提供了必要的手段。它确保了能从空中和地面进行全球尺度的观测,提供了对这些观察现象的分析解译能力以及发展综合信息系统的可能。这样便可以建立地球系统的概念模型,以预测全球环境变化的趋势。文中还简要介绍了有关遥感的全球变化研究国际计划以及我国的全球变化研究。
Global change is the result of interactions and feedback from all the layers of the planet. It includes the long-term evolution of the Earth from thousands to millions of years, including changes in the atmosphere and oceans. However, as the focus of global research, it is also the global environmental change of tens to hundreds of years that is closely linked with human existence. It mainly refers to the dynamic climate system and biogeochemical cycles. The former controls the surface temperature and precipitation of the atmosphere and ocean processes; the latter is the life-based movement of chemical elements (C, N, P, S) in the Earth’s system. These two subsystems are closely linked and influenced by human activities. Advanced remote sensing technology provides the necessary tools for global research. It ensures that observations can be made on a global scale both from the air and on the ground, providing the ability to analyze and interpret these observations and develop the possibility of an integrated information system. In this way, a conceptual model of the Earth system can be established to predict trends in global environmental change. The article also briefly introduces the international plan for global change research on remote sensing and the study of global change in China.