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中文摘要：
为满足人类对食物、纤维、水和居住地的需求,全球土地利用格局发生了巨大的变化,IPCC第四次评估报告（IPCC,2007）指出土地利用变化是人类影响气候的重要强迫之一。土地利用变化对气候的影响分为生物地球物理作用和生物地球化学作用。分别对有关生物地球物理作用和生物地球化学作用的研究进展以及研究热点进行了综述;并从定量评估两者对气候影响的相对贡献以及两者共同效应的角度,回顾了辐射强迫计算和耦合模式数值模拟两种方法的研究进展,及其在森林恢复、人工造林以及碳封存等气候变化应对措施可行性评估中的应用。最后分析和展望了当前土地利用变化对气候影响相关研究中的不确定性以及未来发展方向。
英文摘要：
Worldwide land use changes are being driven by the demand of food,fiber,water,and shelter to more than six billion people.Land use change is becoming an important anthropogenic forcing of global climate system as referred by IPCC AR4（IPCC,2007）.The impacts of land use change on climate system can be divided into two major processes,that is biogeophysical and biogeochemical.The authors reviewed relative researches and hot topics on the two processes,respectively,and introduced two methodologies of assessing the relative importance for the two processes,one is to calculate their radiative forcing,the other is to use the couple model to simulate the two processes at the same time.These two methodologies were applied to access the policy of climate change such as afforestation,reforestation,and carbon sequestration.The uncertainties and further research topics were also discussed.
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