气候变化领域集成服务门户(CCPortal): A Century of Legacy Phosphorus Dynamics in a Large Drainage Basin

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DOI	10.1029/2018GB005914
	A Century of Legacy Phosphorus Dynamics in a Large Drainage Basin
	McCrackin M.L.; Muller-Karulis B.; Gustafsson B.G.; Howarth R.W.; Humborg C.; Svanbäck A.; Swaney D.P.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1107
结束页码	1122
卷号	32 期号:7
英文摘要	There is growing evidence that the release of phosphorus (P) from “legacy” stores can frustrate efforts to reduce P loading to surface water from sources such as agriculture and human sewage. Less is known, however, about the magnitude and residence times of these legacy pools. Here we constructed a budget of net anthropogenic P inputs to the Baltic Sea drainage basin and developed a three-parameter, two-box model to describe the movement of anthropogenic P though temporary (mobile) and long-term (stable) storage pools. Phosphorus entered the sea as direct coastal effluent discharge and via rapid transport and slow, legacy pathways. The model reproduced past waterborne P loads and suggested an ~30-year residence time in the mobile pool. Between 1900 and 2013, 17 and 27 Mt P has accumulated in the mobile and stable pools, respectively. Phosphorus inputs to the sea have halved since the 1980s due to improvements in coastal sewage treatment and reductions associated with the rapid transport pathway. After decades of accumulation, the system appears to have shifted to a depletion phase; absent further reductions in net anthropogenic P input, future waterborne loads could decrease. Presently, losses from the mobile pool contribute nearly half of P loads, suggesting that it will be difficult to achieve substantial near-term reductions. However, there is still potential to make progress toward eutrophication management goals by addressing rapid transport pathways, such as overland flow, as well as mobile stores, such as cropland with large soil-P reserves. ©2018. The Authors.
英文关键词	Baltic Sea; eutrophication; legacy phosphorus; model
语种	英语
scopus关键词	agricultural land; anthropogenic effect; drainage basin; effluent; eutrophication; model; overland flow; phosphorite; pool; residence time; sewage treatment; surface water; Atlantic Ocean; Baltic Sea
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129814
作者单位	Baltic Sea Centre, Stockholm University, Stockholm, Sweden; Faculty of Biological and Environmental Sciences, Tvärminne Zoological Station, University of Helsinki, Hanko, Finland; Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, United States
推荐引用方式 GB/T 7714	McCrackin M.L.,Muller-Karulis B.,Gustafsson B.G.,et al. A Century of Legacy Phosphorus Dynamics in a Large Drainage Basin[J],2018,32(7).
APA	McCrackin M.L..,Muller-Karulis B..,Gustafsson B.G..,Howarth R.W..,Humborg C..,...&Swaney D.P..(2018).A Century of Legacy Phosphorus Dynamics in a Large Drainage Basin.Global Biogeochemical Cycles,32(7).
MLA	McCrackin M.L.,et al."A Century of Legacy Phosphorus Dynamics in a Large Drainage Basin".Global Biogeochemical Cycles 32.7(2018).