流域化学风化作用的碳汇机制研究进展

Progress of Carbon Sink by Chemical Weathering of Watershed

碳循环是连接温室气体、土地利用等全球性重大环境问题的关系纽带。流域的化学风化过程中CO2消耗过程是全球碳循环的重要组成部分,其作用所致的碳汇是"遗漏汇"的主要组成之一。本文结合国内外近来研究动态,探讨并总结了岩石圈化学风化的CO2消耗形成机理及其影响机制,流域CO2消耗通量的计算方法,流域河流的碳化学特征和输送特征对流域环境变化的响应。最后提出了当前流域碳循环研究中待解决的问题和今后发展方向。

Carbon cycle is the key point which links important global environmental problems such as greenhouse gases, land-use etc. Carbon sink by carbon dioxide consumption during chemical weathering of watershed is one important part of the ＂missing sink＂. In this paper, the mechanism and affecting factors of carbon consumption during rock chemical weathering was presented, the methods of estimating the amount of carbon consumption were summarized, the response of chemical and transiting characteristics of riverine carbon to changing environment of watershed were emphasized. Finally, the facing problems and developing directions were pointed out.