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yeluping至尊木蟲 (著名寫手)
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[求助]
碳循環(huán):摘要翻譯
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| 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. |
至尊木蟲 (著名寫手)
| 有人認(rèn)為農(nóng)業(yè)土壤侵蝕擾亂了全球碳循環(huán),但其效應(yīng)的估計從每年1拍克(10的15次方克)到相同數(shù)量級的沉降。我們在大規(guī)模調(diào)查中用銫-137和碳庫存測量法得到一致的證據(jù),發(fā)現(xiàn)侵蝕引起的大氣碳的沉降大約相當(dāng)于侵蝕傳送碳的26%。根據(jù)這樣的關(guān)系,我們估計在全世界的農(nóng)業(yè)景觀中每年由侵蝕造成的全球碳沉降為0.12(0.06~0.27)拍克。我們的分析直接挑戰(zhàn)認(rèn)為農(nóng)業(yè)侵蝕是大氣CO2的重要來源或沉降的觀點。 |
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