DOI: 10.1038/ngeo2486
论文题名: Globally significant greenhouse-gas emissions from African inland waters
作者: Borges A.V. ; Darchambeau F. ; Teodoru C.R. ; Marwick T.R. ; Tamooh F. ; Geeraert N. ; Omengo F.O. ; Guérin F. ; Lambert T. ; Morana C. ; Okuku E. ; Bouillon S.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 8 起始页码: 637
结束页码: 642
语种: 英语
Scopus关键词: atmospheric pollution
; biomass
; carbon dioxide
; carbon emission
; carbon sink
; concentration (composition)
; gas transport
; greenhouse gas
; methane
; nitrous oxide
; wetland
; Congo River
英文摘要: Carbon dioxide emissions to the atmosphere from inland waters - streams, rivers, lakes and reservoirs - are nearly equivalent to ocean and land sinks globally. Inland waters can be an important source of methane and nitrous oxide emissions as well, but emissions are poorly quantified, especially in Africa. Here we report dissolved carbon dioxide, methane and nitrous oxide concentrations from 12 rivers in sub-Saharan Africa, including seasonally resolved sampling at 39 sites, acquired between 2006 and 2014. Fluxes were calculated from published gas transfer velocities, and upscaled to the area of all sub-Saharan African rivers using available spatial data sets. Carbon dioxide-equivalent emissions from river channels alone were about 0.4 Pg carbon per year, equivalent to two-thirds of the overall net carbon land sink previously reported for Africa. Including emissions from wetlands of the Congo river increases the total carbon dioxide-equivalent greenhouse-gas emissions to about 0.9 Pg carbon per year, equivalent to about one quarter of the global ocean and terrestrial combined carbon sink. Riverine carbon dioxide and methane emissions increase with wetland extent and upland biomass. We therefore suggest that future changes in wetland and upland cover could strongly affect greenhouse-gas emissions from African inland waters. © 2015 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106281
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Université de Liège, Unité d'Océanographie Chimique, Institut de Physique (B5), Belgium; Katholieke Universiteit Leuven, Department of Earth and Environmental Sciences, Celestijnenlaan 200E, Leuven, Belgium; Kenyatta University, Department of Zoological Sciences, PO Box 16778-80100, Mombasa, Kenya; Geosciences Environnement Toulouse UMR 5563 and UR 234 IRD, Université Paul-Sabatier, Avenue Edouard Belin 14, Toulouse, France; Kenya Marine and Fisheries Research Institute, PO Box 81651, Mombasa, Kenya
Recommended Citation:
Borges A.V.,Darchambeau F.,Teodoru C.R.,et al. Globally significant greenhouse-gas emissions from African inland waters[J]. Nature Geoscience,2015-01-01,8(8)