高校地质学报2012，Vol.18Issue(2)：215-224,10.
硅酸盐风化与全球碳循环研究回顾及新进展
Review and Advancements of Studies on Silicate Weathering and the Global Carbon Cycle
摘要
Abstract
Silicate weathering is a major sink of the atmospheric CO2, which directly affects the global carbon cycle and the climate. Since the pioneering work of Walker et al. (1981), studies on "silicate weathering, carbon cycle and climate changes" have sprung up in recent years. Many advancements have been obtained from computer models to river water geochemistry and from large rivers with a drainage area exceeding to 10 km to monolithologic small watershed with tens/hundreds km drainage area,. In the global scale, atmospheric CO2 consumption from silicate weathering is about 0.138-0.169 Gt per year. Compared to the current atmospheric carbon content of 800 Gt, at first glance, this CO2 consumption rate seems so slow that silicate weathering would play only a negligible role in the global carbon cycle. However, atmospheric CO2 removed from silicate weathering is transported by rivers and thereafter precipitated in the ocean as carbonate minerals, and the residence time of carbon in carbonate rocks is in excess of millions of years. Therefore, silicate weathering is an important mechanism that modulates the long-term carbon cycle. Moreover, researches show that the small watersheds draining basalts/ophiolites in the tropical zones have the highest silicate weathering and CO2 consumption rates. It is estimated that CO2 consumption from volcanic rocks in the tropical zones represents about 10% of the global export of carbon by silicate weathering, while the tropical volcanic arcs correspond to only~l% of the exorheic drainage area worldwide.关键词
硅酸盐风化/全球碳循环/气候变化Key words
Silicate weathering/ global carbon cycle/ climate change分类
资源环境引用本文复制引用
吴卫华,郑洪波,杨杰东,罗超..硅酸盐风化与全球碳循环研究回顾及新进展[J].高校地质学报,2012,18(2):215-224,10.基金项目
国家863项目(2009AA06Z112) （2009AA06Z112）
国家自然科学基金(40830107,40873001,41003001) （40830107,40873001,41003001）
中国地调局工作项目(1212011087126联合资助 （）
