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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

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文摘 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一。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。
其他语种文摘 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.
来源 地理科学进展 ,2005,24(5):50-60 【核心库】
关键词 河流碳循环 ; 全球变化 ; 有机碳 ; 通量 ; 人类活动
地址

中山大学地理科学与规划学院, 广东, 广州, 510275

语种 中文
文献类型 研究性论文
ISSN 1007-6301
学科 大气科学(气象学)
基金 国家自然科学基金 ;  国家教育部985工程 ;  广东省自然科学基金 ;  国家教育部高等学校博士学科点专项科研基金
文献收藏号 CSCD:2163352

参考文献 共 64 共4页

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