globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2582
论文题名:
Significant fraction of CO2 emissions from boreal lakes derived from hydrologic inorganic carbon inputs
作者: Weyhenmeyer G.A.; Kosten S.; Wallin M.B.; Tranvik L.J.; Jeppesen E.; Roland F.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期:12
起始页码: 933
结束页码: 936
语种: 英语
Scopus关键词: biogeochemical cycle ; carbon emission ; carbon flux ; carbon monoxide ; concentration (composition) ; dissolved inorganic carbon ; dissolved organic carbon ; environmental factor ; inorganic carbon ; lacustrine environment ; land use change ; phosphorus ; surface water ; watershed
英文摘要: Annual CO2 emissions from lakes and other inland waters into the atmosphere are estimated to almost entirely compensate the total annual carbon uptake by oceans. CO2 supersaturation in lakes, which results in CO2 emissions, is frequently attributed to CO2 produced within the lake. However, lateral inorganic carbon flux through watersheds can also be sizeable. Here we calculated lake surface water CO2 concentrations and emissions using lake pH, alkalinity and temperature from a compilation of data from 5,118 boreal lakes. Autumn surface water CO2 concentrations and CO2 emissions from the 5,118 lakes co-varied with lake internal autumn CO2 production. However, using a mass balance approach we found that CO2 emission in the majority of lakes was sustained by inorganic carbon loading from the catchment rather than by internal CO2 production. Small lakes with high dissolved organic carbon and phosphorus concentrations, shorter retention times and longer ice-free seasons had the highest CO2 concentrations. CO2 emissions from these small lakes was twice that of comparable lakes in colder regions, and similar to emissions from subtropical and tropical lakes. We conclude that changes in land use and climate that increase dissolved inorganic carbon may cause emission levels from boreal lakes to approach those of lakes in warmer regions. © 2015 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106115
Appears in Collections:气候减缓与适应
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作者单位: Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala, Sweden; Department of Aquatic Ecology and Environmental Biology, Institute ForWater AndWetland Research, Radboud University, Heyendaalseweg 135, Nijmegen, Netherlands; Department of Earth Sciences, Uppsala University, Villavägen 16, Uppsala, Sweden; Department of Bioscience and Arctic Research Centre, Aarhus University, Vejlsøvej 25, Silkeborg, Denmark; Sino-Danish Centre for Education and Research, Beijing, China; Department of Biology, Juiz de Fora Federal University, Juiz de Fora, Brazil

Recommended Citation:
Weyhenmeyer G.A.,Kosten S.,Wallin M.B.,et al. Significant fraction of CO2 emissions from boreal lakes derived from hydrologic inorganic carbon inputs[J]. Nature Geoscience,2015-01-01,8(12)
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