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| Titel |
Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication? |
| VerfasserIn |
S. T. Lennartz, A. Lehmann, J. Herrford, F. Malien, H.-P. Hansen, H. Biester, H. W. Bange |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 22 ; Nr. 11, no. 22 (2014-11-24), S.6323-6339 |
| Datensatznummer |
250117685
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| Publikation (Nr.) |
 copernicus.org/bg-11-6323-2014.pdf |
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| Zusammenfassung |
| The Boknis Eck (BE) time series station, initiated in 1957, is one
of the longest-operated time series stations worldwide. We present
the first statistical evaluation of a data set of nine physical,
chemical and biological parameters in the period of 1957–2013. In
the past three to five decades, all of the measured parameters underwent
significant long-term changes. Most striking is an ongoing decline
in bottom water oxygen concentration, despite a significant decrease
of nutrient and chlorophyll a concentrations. Temperature-enhanced
oxygen consumption in the bottom water and a prolongation of the
stratification period are discussed as possible reasons for the
ongoing oxygen decline despite declining
eutrophication. Observations at the BE station were compared with
model output of the Kiel Baltic Sea Ice Ocean Model
(BSIOM). Reproduced trends were in good agreement with observed
trends for temperature and oxygen, but generally the oxygen
concentration at the bottom has been overestimated. |
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