B Hellmann’s research while affiliated with University of Greifswald and other places


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Publications (2)


Nycthemeral variations of the dissolved oxygen concentration in the turbidity maximum of three European estuaries: Biological vs. physical processes
  • Article

October 1999

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13 Reads

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14 Citations

Journal of Marine Systems

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J Castel

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[...]

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B Hellmann

Nycthemeral variations in oxygen concentrations have been compared in the maximum turbidity zone of three European estuaries, the Elbe, the Westerschelde and the Gironde. It appears that oxygen concentration increases during the day in the Elbe and the Westerschelde due to biological processes, but not in the Gironde where physical processes dominate. The results are discussed in relation to the concentration of suspended particulate matter in the maximum turbidity zone and the difference in quality of the organic matter between the three estuaries.


Simulation und Messung von Zirkulations-und Transportprozessen im Greifswalder Bodden, Oderästuar und den angrenzenden Küstengewässern
  • Article
  • Full-text available

January 1999

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196 Reads

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10 Citations

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Citations (2)


... Among others, it is hypothesized that the observed decline in recruitment is linked to a shift in the retention performance of the GWB, caused by changes in the atmospheric forcing. Studies on the lagoon hydrography seem to support this hypothesis, suggesting that its water exchange has a high interannual variability (Stigge, 1989; Buckmann et al., 1998; J€ onsson et al., 1998). To test this hypothesis for this specific stock and to improve the general understanding of the function of coastal larval retention areas for recruitment success, a modelling approach was applied. ...

Reference:

Wind-induced variability in coastal larval retention areas: A case study on Western Baltic spring-spawning herring
Simulation und Messung von Zirkulations-und Transportprozessen im Greifswalder Bodden, Oderästuar und den angrenzenden Küstengewässern

... The analysis of Pto,Cuatreros and Pto.Ing White time series has shown a slightly lower mean values at IW than at PC, and in both cases the maximum values have been recorded during stormy winters. This distribution trend agreed with the reports from other authors for different estuaries at other latitudes, not only obtained from field work (Irigoien et al. 1999) but also from remote sensing ones (Chen et al. 2007). ...

Nycthemeral variations of the dissolved oxygen concentration in the turbidity maximum of three European estuaries: Biological vs. physical processes
  • Citing Article
  • October 1999

Journal of Marine Systems