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Articles | Volume 13, issue 4
Articles | Volume 13, issue 4
https://doi.org/10.5194/bg-13-1009-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/bg-13-1009-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 13, issue 4
Research article
 | 
23 Feb 2016
Research article |  | 23 Feb 2016

Changing seasonality of the Baltic Sea

Mati Kahru, Ragnar Elmgren, and Oleg P. Savchuk

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Short summary
Using satellite-derived data sets we have found drastic changes in the timing of the annual cycle in physical and ecological variables of the Baltic Sea over the last 30 years. The summer season starts earlier and extends longer. The period with sea-surface temperature of at least 17 ˚C has doubled; the period with high water turbidity has quadrupled. While both the phytoplankton spring and summer blooms have become earlier, the annual maximum has switched to the summer cyanobacteria bloom.
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