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Holocene variations in peatland methane cyclingassociated with the Asian summer monsoonsystem
Zheng,YH(Zheng,Yanhong)[1,2]; Singarayer, JS(Singarayer, Joy S.)[3]; Cheng,P(Cheng,Peng)[4]; Yu,XF(Yu,Xuefeng)[4]; Liu,Z(Liu,Zhao)[4]; Valdes, PJ(Valdes,Paul j.)[5]; Pancost, RD(Pancost, Richard D.)[1]
Source Publicationnature communications

Atmospheric methane concentrations decreased during the early to middle Holocene; however, the governing mechanisms remain controversial. Although it has been suggested that the mid-Holocene minimum methane emissions are associated with hydrological change, direct evidence is lacking. Here we report a new independent approach, linking hydrological change in peat sediments from the Tibetan Plateau to changes in archaeal diether concentrations and diploptene δ13C values as tracers for methanogenesis and methanotrophy, respectively. A minimum in inferred methanogenesis occurred during the mid-Holocene, which, locally, corresponds with the driest conditions of the Holocene, reflecting a minimum in Asian monsoon precipitation. The close coupling between precipitation and methanogenesis is validated by climate simulations, which also suggest a regionally widespread impact. Importantly, the minimum in methanogenesis is associated with a maximum in methanotrophy. Therefore, methane emissions in the Tibetan Plateau region were apparently lower during the mid-Holocene and partially controlled by interactions of large-scale atmospheric circulation.

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Document Type期刊论文
Corresponding AuthorZheng,YH(Zheng,Yanhong)[1,2]
Affiliation1.Organic Geochemistry Unit, Cabot Institute and School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, UK;
2.State Key Laboratory ofContinental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China;
3.Department of Meteorology, University of Reading, Earley Gate,PO Box 243, Reading, RG6 6BB, UK;
4.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences,Xi’an 710075, China;
5.Bristol Research Initiative for the Dynamic Global Environment, Cabot Institute and School of Geographical Sciences, University ofBristol, University Road, Bristol BS8 1SS, UK.
Recommended Citation
GB/T 7714
Zheng,YH,Singarayer, JS,Cheng,P,et al. Holocene variations in peatland methane cyclingassociated with the Asian summer monsoonsystem[J]. nature communications,2014,5:4631.
APA Zheng,YH.,Singarayer, JS.,Cheng,P.,Yu,XF.,Liu,Z.,...&Pancost, RD.(2014).Holocene variations in peatland methane cyclingassociated with the Asian summer monsoonsystem.nature communications,5,4631.
MLA Zheng,YH,et al."Holocene variations in peatland methane cyclingassociated with the Asian summer monsoonsystem".nature communications 5(2014):4631.
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