Climate regulates the erosional carbon export from the terrestrial biosphere
Climate regulates the erosional carbon export from the terrestrial biosphere
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DOI：
10.1016/j.geomorph.2016.03.028
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发表时间：
2017-01-15
期刊：
影响因子：
3.9
通讯作者：
Hilton, Robert G.
中科院分区：
文献类型：
--
作者：
Hilton, Robert G.
侵蚀驱动着颗粒有机碳从陆地生物圈（POC生物圈）输出并输送到河流。碳转移是全球性的，并可能导致大气中的二氧化碳（CO2）的下降，如果侵蚀POC生物圈逃脱河流转移和沉积过程中的退化。尽管认识到这一点，我们缺乏一个全球性的角度来看，如何构造和气候因素，管理物理侵蚀调节POC生物圈排放，掩盖了山区建设，气候和CO2下降之间的联系。为了弥补这一不足，地球化学（三角洲C-13，C-14和C/N），水文（水流量，悬浮泥沙浓度）和地貌（坡度）测量相结合，从33个全球分布的森林山区集水区。放射性碳活度被用来解释岩石来源的有机碳，并揭示了从山地森林侵蚀的POC生物圈主要是
Erosion drives the export of particulate organic carbon from the terrestrial biosphere (POCbiosphere) and its delivery to rivers. The carbon transfer is globally significant and can result in drawdown of atmospheric carbon dioxide (CO2) if the eroded POCbiosphere escapes degradation during river transfer and sedimentary deposition. Despite this recognition, we lack a global perspective on how the tectonic and climatic factors which govern physical erosion regulate POCbiosphere discharge, obscuring linkages between mountain building, climate, and CO2 drawdown. To fill this deficit, geochemical (delta C-13, C-14 and C/N), hydrometric (water discharge, suspended sediment concentration) and geomorphic (slope) measurements are combined from 33 globally-distributed forested mountain catchments. Radiocarbon activity is used to account for rock-derived organic carbon and reveals that POCbiosphere eroded from mountain forests is mostly