气候变化领域集成服务门户(CCPortal): Landscape controls on riverine export of dissolved organic carbon from Great Britain

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DOI	10.1007/s10533-021-00762-2
	Landscape controls on riverine export of dissolved organic carbon from Great Britain
	Williamson J.L.; Tye A.; Lapworth D.J.; Monteith D.; Sanders R.; Mayor D.J.; Barry C.; Bowes M.; Bowes M.; Burden A.; Callaghan N.; Farr G.; Felgate S.; Fitch A.; Gibb S.; Gilbert P.; Hargreaves G.; Keenan P.; Kitidis V.; Juergens M.; Martin A.; Mounteney I.; Nightingale P.D.; Pereira M.G.; Olszewska J.; Pickard A.; Rees A.P.; Spears B.; Stinchcombe M.; White D.; Williams P.; Worrall F.; Evans C.
发表日期	2021
ISSN	1682563
英文摘要	The dissolved organic carbon (DOC) export from land to ocean via rivers is a significant term in the global C cycle, and has been modified in many areas by human activity. DOC exports from large global rivers are fairly well quantified, but those from smaller river systems, including those draining oceanic regions, are generally under-represented in global syntheses. Given that these regions typically have high runoff and high peat cover, they may exert a disproportionate influence on the global land–ocean DOC export. Here we describe a comprehensive new assessment of the annual riverine DOC export to estuaries across the island of Great Britain (GB), which spans the latitude range 50–60° N with strong spatial gradients of topography, soils, rainfall, land use and population density. DOC yields (export per unit area) were positively related to and best predicted by rainfall, peat extent and forest cover, but relatively insensitive to population density or agricultural development. Based on an empirical relationship with land use and rainfall we estimate that the DOC export from the GB land area to the freshwater-seawater interface was 1.15 Tg C year−1 in 2017. The average yield for GB rivers is 5.04 g C m−2 year−1, higher than most of the world’s major rivers, including those of the humid tropics and Arctic, supporting the conclusion that under-representation of smaller river systems draining peat-rich areas could lead to under-estimation of the global land–ocean DOC export. The main anthropogenic factor influencing the spatial distribution of GB DOC exports appears to be upland conifer plantation forestry, which is estimated to have raised the overall DOC export by 0.168 Tg C year−1. This is equivalent to 15% of the estimated current rate of net CO2 uptake by British forests. With the UK and many other countries seeking to expand plantation forest cover for climate change mitigation, this ‘leak in the ecosystem’ should be incorporated in future assessments of the CO2 sequestration potential of forest planting strategies. © 2021, The Author(s).
英文关键词	Dissolved organic carbon; DOC export; DOC yield; Great britain; Rivers; Terrigenous DOC
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184652
作者单位	UK Centre for Ecology & Hydrology, Environment Centre Wales, Deiniol Road, Bangor, Gwynedd LL57 2UW, United Kingdom; British Geological Survey, Keyworth, Nottingham, NG12 5GG, United Kingdom; British Geological Survey, Maclean Building, Wallingford, OX10 8BB, United Kingdom; UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster, LA1 4AP, United Kingdom; National Oceanography Centre, European Way, Southampton, SO14 3ZH, United Kingdom; UK Centre for Ecology & Hydrology, Maclean Building, Wallingford, OX10 8BB, United Kingdom; British Geological Survey, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom; University of the Highlands and Islands, Environmental Research Institute, Castle Street, Thurso, KW14 7JD, United Kingdom; National Oceanography Centre, Joseph Proudman Building, 6 Brownlow Street, Liverpool, L3 5DA, United Kingdom; Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH, United Kingdom; UK Centre ...
推荐引用方式 GB/T 7714	Williamson J.L.,Tye A.,Lapworth D.J.,et al. Landscape controls on riverine export of dissolved organic carbon from Great Britain[J],2021.
APA	Williamson J.L..,Tye A..,Lapworth D.J..,Monteith D..,Sanders R..,...&Evans C..(2021).Landscape controls on riverine export of dissolved organic carbon from Great Britain.Biogeochemistry.
MLA	Williamson J.L.,et al."Landscape controls on riverine export of dissolved organic carbon from Great Britain".Biogeochemistry (2021).