Rapid Soil Production and Weathering in the Southern Alps, New Zealand
Rapid Soil Production and Weathering in the Southern Alps, New Zealand
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DOI：
10.1126/science.1244908
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发表时间：
2014-02-07
期刊：
影响因子：
56.9
通讯作者：
Malcolm, Brendon
中科院分区：
文献类型：
--
作者：
Larsen, Isaac J.;Almond, Peter C.;Malcolm, Brendon
评估关于山脉对二氧化碳循环和气候影响的相互矛盾的理论，需要了解构造抬升景观的风化通量。在地球上最快速上升的山脉中，缺乏土壤生产和风化率测量，这使得很难确定风化率是随着快速侵蚀而增加还是减少。新西兰南阿尔卑斯山西部土壤中的铍-10浓度表明，土壤从基岩中产生的速度比以前认识到的要快，速度高达每年2.5毫米。风化强度数据进一步表明，土壤化学剥蚀率随侵蚀率成比例增加。这些高风化速率支持了这样一种观点，即山脉在全球尺度的化学风化中起着关键作用，因此对全球碳循环具有潜在的重要影响。
Evaluating conflicting theories about the influence of mountains on carbon dioxide cycling and climate requires understanding weathering fluxes from tectonically uplifting landscapes. The lack of soil production and weathering rate measurements in Earth's most rapidly uplifting mountains has made it difficult to determine whether weathering rates increase or decline in response to rapid erosion. Beryllium-10 concentrations in soils from the western Southern Alps, New Zealand, demonstrate that soil is produced from bedrock more rapidly than previously recognized, at rates up to 2.5 millimeters per year. Weathering intensity data further indicate that soil chemical denudation rates increase proportionally with erosion rates. These high weathering rates support the view that mountains play a key role in global-scale chemical weathering and thus have potentially important implications for the global carbon cycle.