A Baltic Sea estuary as a phosphorus source and sink after drastic load reduction: seasonal and long-term mass balances for the Stockholm inner archipelago for 1968–2015

Walve, Jakob; Sandberg, Maria; Larsson, Ulf; Lännergren, Christer

doi:https://doi.org/10.5194/bg-15-3003-2018

Articles | Volume 15, issue 9

https://doi.org/10.5194/bg-15-3003-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-15-3003-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 9

Research article

|

17 May 2018

Research article |

| 17 May 2018

A Baltic Sea estuary as a phosphorus source and sink after drastic load reduction: seasonal and long-term mass balances for the Stockholm inner archipelago for 1968–2015

Jakob Walve, Maria Sandberg, Ulf Larsson, and Christer Lännergren

Supplement

https://doi.org/10.5194/bg-15-3003-2018-supplement

Data sets

Water chemistry data 1996-2015 SLU http://www.slu.se/institutioner/vatten-miljo/datavardskap/

Water chemistry data 1968-2015 SMHI http://www.smhi.se/klimatdata/oceanografi/havsmiljodata/

Water runoff data SMHI https://vattenwebb.smhi.se/

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Short summary

Phosphorus (P) release from sediments can delay recovery of eutrophicated waters. For the Stockholm inner archipelago (Baltic Sea), a P budget shows that legacy P release was small and restricted to the 20 years following the large P load reduction in 1975. Current P release is largely a seasonal P recycling in oxic conditions and the area is still a poor P sink. Short P turnover time in the area means that measures binding P in sediments will not be very effective in improving water quality.