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Modelling the dynamics of harmful blooms of Chattonella sp. in the Skagerrak and the Kattegat
SMHI, Research Department, Oceanography.ORCID iD: 0000-0001-7413-7497
SMHI, Research Department, Oceanography.ORCID iD: 0000-0003-4052-045X
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2011 (English)In: ICES CM 2006/E:12, 2011Conference paper, (Other academic)
Abstract [en]

The presentation shows observations, satellite images and model results describing the growth and spreading of Chattonella sp. flagellates in the Skagerrak and the Kattegat. Chattonella sp. is a harmful alga that may cause fish kills due to damage of the gills. Calm weather, stable water column stratification, and low turbulence may facilitate the onset of a Chattonella bloom. Results from the three-dimensional hydrodynamical model HIROMB (High Resolution Operational Model for the Baltic Sea) are used as forcing of a transport model that computes vertical and horizontal transports of chemical and biological compounds. A modified version of the Swedish Coastal and Ocean Biogeochemical model (SCOBI) is used to describe the temporal evolution of the phytoplankton spring blooms in the year 2001 when Chattonella was abundant and 2002 when only small amounts of Chattonella were observed. A comparison with satellite images and cell counts indicates that the model captures the main transport patterns of phytoplankton in the surface layers of the offshore areas. The Chattonella bloom of the model starts in the quite shallow parts of the western Kattegat and in the stratified coastal areas of the northern Skagerrak. The coastal waters near the river Göta Älv of Sweden also indicate a tendency of an increased occurrence of Chattonella. Chattonella is observed in the model during both years but the occurrence of Chattonella is more significant in the year 2001 than in 2002.

Place, publisher, year, edition, pages
2011.
Keyword [en]
Algal blooms; Chattonella sp.; Diatoms; HAB; Marine ecology; Modelling; North Sea; Skagerrak; Kattegat
National Category
Oceanography, Hydrology, Water Resources
Research subject
Oceanography
Identifiers
URN: urn:nbn:se:smhi:diva-3919OAI: oai:DiVA.org:smhi-3919DiVA: diva2:1073657
Conference
Theme Session on Operational oceanography (Co-sponsred by PICES)
Available from: 2017-02-13 Created: 2017-02-13 Last updated: 2017-02-13Bibliographically approved

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fulltext(475 kB)11 downloads
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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