寻找失去的陆地碳汇

全球碳循环是指碳元素在地球表层各圈层中的积累和流动的过程。由于人类活动的影响，从表观上看，现代的全球碳循环处于不平衡状态，即人类燃烧化石燃料和热带毁林所排放的一部分CO2不知去向，这被称为“CO2失汇”。研究表明，北半球的陆地生态系统主要吸收了这部分去向不明的CO2。本文对“CO2失汇”的由来、陆地碳汇的基本特征及其影响因素，以及中国陆地碳汇的大小等进行了评述。

Looking for Missing Carbon Sinks from Terrestrial Ecosystems

Global carbon cycle refers to accumulations and fluxes of carbon element in all spheres of earth surface system. Current global carbon cycle is apparently in imbalance, namely, it is unknown where part of carbon amount released from burning fossil fuels and destroying tropical forests is going. This is called as missing carbon sink. The studies have indicated that the terrestrial ecosystems of the Northern Hemisphere have accumulated the missing carbon. The origin of the missing carbon sin was reviewed as well as the major characters of terrestrial sinks and their affecting factors, and carbon sinks of China’s terrestrial ecosystems