globalchange  > 气候变化与战略
DOI: 10.1038/s41561-021-00722-3
论文题名:
Global carbon dioxide efflux from rivers enhanced by high nocturnal emissions
作者: Gómez-Gener L.; Rocher-Ros G.; Battin T.; Cohen M.J.; Dalmagro H.J.; Dinsmore K.J.; Drake T.W.; Duvert C.; Enrich-Prast A.; Horgby Å.; Johnson M.S.; Kirk L.; Machado-Silva F.; Marzolf N.S.; McDowell M.J.; McDowell W.H.; Miettinen H.; Ojala A.K.; Peter H.; Pumpanen J.; Ran L.; Riveros-Iregui D.A.; Santos I.R.; Six J.; Stanley E.H.; Wallin M.B.; White S.A.; Sponseller R.A.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期:5
起始页码: 289
结束页码: 294
语种: 英语
英文关键词: carbon dioxide ; carbon emission ; estimation method ; light availability ; photosynthesis ; shading ; spatiotemporal analysis
英文摘要: Carbon dioxide (CO2) emissions to the atmosphere from running waters are estimated to be four times greater than the total carbon (C) flux to the oceans. However, these fluxes remain poorly constrained because of substantial spatial and temporal variability in dissolved CO2 concentrations. Using a global compilation of high-frequency CO2 measurements, we demonstrate that nocturnal CO2 emissions are on average 27% (0.9 gC m−2 d−1) greater than those estimated from diurnal concentrations alone. Constraints on light availability due to canopy shading or water colour are the principal controls on observed diel (24 hour) variation, suggesting this nocturnal increase arises from daytime fixation of CO2 by photosynthesis. Because current global estimates of CO2 emissions to the atmosphere from running waters (0.65–1.8 PgC yr−1) rely primarily on discrete measurements of dissolved CO2 obtained during the day, they substantially underestimate the magnitude of this flux. Accounting for night-time CO2 emissions may elevate global estimates from running waters to the atmosphere by 0.20–0.55 PgC yr−1. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169754
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作者单位: Stream Biofilm and Ecosystem Research Laboratory, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden; School of Forest Resources and Conservation, University of Florida, Gainesville, FL, United States; University of Cuiabá, Cuiabá, Brazil; Centre for Ecology and Hydrology, Bush Estate, Penicuik, United Kingdom; Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland; Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, Australia; Biogas Research Center and Department of Thematic Studies–Environmental Change, Linköping University, Linköping, Sweden; Post-Graduate Program in Geosciences (Environmental Geochemistry), Chemistry Institute, Fluminense Federal University, Niterói, Brazil; Institute for Resources, Environment and Sustainability, University of British Columbia, Vancouver, BC, Canada; Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada; School of Natural Resources and Environment, University of Florida, Gainesville, FL, United States; Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, United States; Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United States; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden; Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Helsinki, Finland; Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland; Department of Geography, The University of Hong Kong, Pokfulam, Hong Kong; Department of Geography, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States; Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden; Center for Limnology, University of Wisconsin-Madison, Madison, WI, United States; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden; National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia

Recommended Citation:
Gómez-Gener L.,Rocher-Ros G.,Battin T.,et al. Global carbon dioxide efflux from rivers enhanced by high nocturnal emissions[J]. Nature Geoscience,2021-01-01,14(5)
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