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Earthquake-triggered increase in biospheric carbon export from a mountain belt
Wang, Jin1,2,3; Jin, Zhangdong1,4; Hilton, Robert G.2; Zhang, Fei1; Li, Gen5; Densmore, Alexander L.6; Grocke, Darren R.7; Xu, Xiaomei8; West, A. Joshua5
Source PublicationGEOLOGY
AbstractOn geological time scales, the erosion of carbon from the terrestrial biosphere and its burial in sediments can counter CO2 emissions from the solid Earth. Earthquakes may increase the erosion of this biospheric carbon and supply it to mountain rivers by triggering landslides, which rapidly strip hillslopes of vegetation and soil. Over the long term, elevated river sediment loads may promote more efficient carbon burial. However, riverine export of earthquake-mobilized carbon has remained poorly constrained. Here we quantify biospheric carbon discharge by the Zagunao River following a large earthquake with a unique set of samples collected before and after the A.D. 2008 M-w 7.9 Wenchuan (China) earthquake. Radioactive and stable carbon isotopes are used to isolate the biospheric carbon, accounting for rock-derived organic carbon inputs. River discharge of biospheric carbon doubled in the downstream reaches, characterized by moderate landslide impact, following the earthquake. The rapid export of carbon from earthquake-triggered landslides appears to outpace its degradation on hillslopes while sediment loads are elevated. This means that enhanced river discharge of biospheric carbon following large earthquakes can link active tectonics to CO2 drawdown.
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000378203600020
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Univ Durham, Dept Geog, Durham DH1 3LE, England
3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
4.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
5.Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089 USA
6.Univ Durham, Inst Hazard Risk & Resilience, Durham DH1 3LE, England
7.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
8.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA
Recommended Citation
GB/T 7714
Wang, Jin,Jin, Zhangdong,Hilton, Robert G.,et al. Earthquake-triggered increase in biospheric carbon export from a mountain belt[J]. GEOLOGY,2016,44(6):471-474.
APA Wang, Jin.,Jin, Zhangdong.,Hilton, Robert G..,Zhang, Fei.,Li, Gen.,...&West, A. Joshua.(2016).Earthquake-triggered increase in biospheric carbon export from a mountain belt.GEOLOGY,44(6),471-474.
MLA Wang, Jin,et al."Earthquake-triggered increase in biospheric carbon export from a mountain belt".GEOLOGY 44.6(2016):471-474.
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