A New Phosphorus Paradigm for the Baltic Proper

被引：40

作者：

Stigebrandt, Anders ^{[1
]}

Rahm, Lars ^{[2
]}

Viktorsson, Lena ^{[1
]}

Odalen, Malin ^{[1
]}

Hall, Per O. J. ^{[3
]}

Liljebladh, Bengt ^{[1
]}

机构：

[1] Univ Gothenburg, Dept Earth Sci, S-40530 Gothenburg, Sweden

[2] Linkoping Univ, Dept Themat Studies Water & Environm Studies, S-58183 Linkoping, Sweden

[3] Univ Gothenburg, Dept Chem & Mol Biol, S-41296 Gothenburg, Sweden

来源：

AMBIO | 2014年 / 43卷 / 05期

关键词：

Internal load; Phosphorus; Baltic Sea; Mass balance model; Sediment; Eutrophication; WATER-COLUMN ANOXIA; OXYGEN CONDITIONS; SEA; SEDIMENTS; EUTROPHICATION; PHOSPHATE; HYPOXIA; REGENERATION; FIXATION; RELEASE;

D O I：

10.1007/s13280-013-0441-3

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The external phosphorus (P) loading has been halved, but the P content in the water column and the area of anoxic bottoms in Baltic proper has increased during the last 30 years. This can be explained by a temporary internal source of dissolved inorganic phosphorus (DIP) that is turned on when the water above the bottom sediment becomes anoxic. A load-response model, explaining the evolution from 1980 to 2005, suggests that the average specific DIP flux from anoxic bottoms in the Baltic proper is about 2.3 g P m(-2) year(-1). This is commensurable with fluxes estimated in situ from anoxic bottoms in the open Baltic proper and from hydrographic data in the deep part of Bornholm Basin. Oxygenation of anoxic bottoms, natural or manmade, may quickly turn off the internal P source from anoxic bottoms. This new P-paradigm should have far-reaching implications for abatement of eutrophication in the Baltic proper.

引用

页码：634 / 643

页数：10

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