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学科主题: 生物科学::普通生物学
题名: Lateral transport of soil carbon and land-atmosphere CO2 flux induced by water erosion in China
作者: Yue, Y (Yue, Yao)1, 2; Ni, JR (Ni, Jinren)1; Ciais, P (Ciais, Philippe)3; Piao, SL (Piao, Shilong)4, 5, 6; Wang, T (Wang, Tao)5, 6; Huang, MT (Huang, Mengtian)4; Borthwick, AGL (Borthwick, Alistair G. L.)7; Li, TH (Li, Tianhong)1; Wang, YC (Wang, Yichu)1; Chappell, A (Chappell, Adrian)8; Van Oost, K (Van Oost, Kristof)9
通讯作者: Ni, JR
刊名: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
发表日期: 2016
DOI: 10.1073/pnas.1523358113
卷: 113, 期:24, 页:6617-6622
收录类别: SCI
合作性质: 国际
文章类型: Article
英文摘要: Soil erosion by water impacts soil organic carbon stocks and alters CO2 fluxes exchanged with the atmosphere. The role of erosion as a net sink or source of atmospheric CO2 remains highly debated, and little information is available at scales larger than small catchments or regions. This study attempts to quantify the lateral transport of soil carbon and consequent land-atmosphere CO2 fluxes at the scale of China, where severe erosion has occurred for several decades. Based on the distribution of soil erosion rates derived from detailed national surveys and soil carbon inventories, here we show that water erosion in China displaced 180 +/- 80 Mt C.y(-1) of soil organic carbon during the last two decades, and this resulted a net land sink for atmospheric CO2 of 45 +/- 25 Mt C.y(-1), equivalent to 8-37% of the terrestrial carbon sink previously assessed in China. Interestingly, the "hotspots," largely distributed in mountainous regions in the most intensive sink areas (>40 g C.m(-2).y(-1)), occupy only 1.5% of the total area suffering water erosion, but contribute 19.3% to the national erosion-induced CO2 sink. The erosion-induced CO2 sink underwent a remarkable reduction of about 16% from the middle 1990s to the early 2010s, due to diminishing erosion after the implementation of large-scale soil conservation programs. These findings demonstrate the necessity of including erosion-induced CO2 in the terrestrial budget, hence reducing the level of uncertainty.
语种: 英语
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内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7678
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Peking Univ, Coll Environm Sci & Engn, The Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China
2.Wuhan Univ, Sch Water Resources & Hydropower Engn, Wuhan 430072, Peoples R China
3.Univ Versailles St Quentin En Yvelines, Commissariat Energie Atom & Energies Alternat, Inst Pierre Simon Laplace, Lab Sci Climat & Envirom,CNRS, F-91191 Gif Sur Yvette, France
4.Peking Univ, Dept Ecol, Beijing 100871, Peoples R China
5.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China
6.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
7.Univ Edinburgh, Sch Engn, Edinburgh EH9 3JL, Midlothian, Scotland
8.CSIRO, Land & Water, Canberra, ACT 2601, Australia
9.Catholic Univ Louvain, Earth & Life Inst, Georges Lemaitre Ctr Earth & Climate Res, B-1348 Louvain, Belgium

Recommended Citation:
Yue, Y ,Ni, JR ,Ciais, P ,et al. Lateral transport of soil carbon and land-atmosphere CO2 flux induced by water erosion in China[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2016,113(24):6617-6622.
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