河流碳循环对全球变化的响应与反馈  

The Feedback and Response of the Riverine Carbon Cycle to Global Changes

作　　者：姚冠荣[1] 高全洲[1] 

机构地区：[1]中山大学地理科学与规划学院,广州510275

出　　处：《地理科学进展》2005年第5期50-60,共11页Progress in Geography

基　　金：国家自然科学基金(40471120)985工程(105203200400006)广东省自然科学基金(031548)高等学校博士学科点专项科研基金(20040558025)资助

摘　　要：河流连接陆地生态系统和海洋两大活动碳库.构成全球碳循环的一个关键环节河流碳的输出及循环过程与近岸水域环境、海洋碳库变动及全球气候系统紧密相关。有机碳在全球碳循环系统中处于核心地位,了解河流有机碳通量及性质变化是目前河流碳循环研究的重要内容之。流域面积的大小及气候和环境性质的差异对河流碳的输移及循环过程影响显著。目前.亚洲季风流域尤其是众多的小流域缺乏系统的有关悬移质生源要素的信息。陆地侵蚀-沉积过程控制着河流碳的主要来源和归宿。当前.人类活动主宰着陆地的侵蚀-沉积状况.这在很大程度上表现为加速了陆地生态系统碳库的扰动与再沉积.并加强了河流向海洋的碳输送。River system is a critical linkage between the terrestrial ecosystem and the ocean two major active carbon pools in global carbon cycle. The export and cycle processes of the riverine carbon are closely related to coastal zone environment, dynamics of the ocean carbon pool and the global climate system. Organic carbon plays the key role in the global carbon cycle, and to understand the fluxes and characteristics of the riverine organic carbon is an important subject in present studies of the riverine carbon cycle. The area of the drainage basin and differences in climate and environment markedly impact the export and cycle processes of the riverine carbon. At present, a large number of small rivers and the rivers in monsoonal Asia lack systemic information about biogenic components of riverine suspended matters. The fate and main sources of the riverine carbon are controlled by the processes of terrestrial erosion-deposition. Nowadays, human activities dominate the condition of terrestrial erosion-deposition, which accelerates redeposition and perturbation of terrestrial ecosystem carbon pool, and strengthens carbon transportation from land to ocean. It is necessary to pay more attention to impacts of human activities on the riverine carbon cycle.

关 键 词：河流碳循环 全球变化 有机碳 通量 人类活动 

分 类 号：P467[天文地球—大气科学及气象学]