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yeluping

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[求助] 碳循环:摘要翻译

Agricultural soil erosion is thought to perturb the global carbon cycle, but estimates of its effect range from a source of 1 petagram per year–1 to a sink of the same magnitude. By using caesium-137 and carbon inventory measurements from a large-scale survey, we found consistent evidence for an erosion-induced sink of atmospheric carbon equivalent to approximately 26% of the carbon transported by erosion. Based on this relationship, we estimated a global carbon sink of 0.12 (range 0.06 to 0.27) petagrams of carbon per year–1 resulting from erosion in the world's agricultural landscapes. Our analysis directly challenges the view that agricultural erosion represents an important source or sink for atmospheric CO2.
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baoshanqiu

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yeluping: 金币+10, 翻译EPI+1, ★★★★★最佳答案, 谢谢。 2015-08-04 09:21:20
有人认为农业土壤侵蚀扰乱了全球碳循环,但其效应的估计从每年1拍克(10的15次方克)到相同数量级的沉降。我们在大规模调查中用铯-137和碳库存测量法得到一致的证据,发现侵蚀引起的大气碳的沉降大约相当于侵蚀传送碳的26%。根据这样的关系,我们估计在全世界的农业景观中每年由侵蚀造成的全球碳沉降为0.12(0.06~0.27)拍克。我们的分析直接挑战认为农业侵蚀是大气CO2的重要来源或沉降的观点。
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