Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
On the dynamics of organic nutrients, nitrogen and phosphorus, in the Baltic Sea
SMHI, Research Department, Oceanography.ORCID iD: 0000-0001-7413-7497
2009 (English)Report (Other academic)
Abstract [en]

In this report we study the dynamics of organic nutrients, nitrogen and phosphorus, in the Baltic Sea. The results indicate that much of the characteristics of the surface layer dynamics of organic nutrients can be described by the Redfield ratio especially in the Baltic proper. There is however deviations from the Redfield ratio that are discussed and needs to be further investigated. The seasonal variations at all investigated stations indicate that the increase and decrease of the organic phosphorus and nitrogen concentrations in spring and autumn takes place with stoichiometric values different from the Redfield ratio. It is also found that organic phosphorus concentrations start to decrease earlier in summer than organic nitrogen that may continue to increase during summer and early autumn. There is a clear trend with decreasing DIN:DIP ratios in late winter at the Gotland Deep during the period 1995-2008 while there is an improved correlation of the Redfield model during the later part of the period when we have extremely low DIN:DIP ratios. Also the results from the Bothnian bay show that the variability of organic matter is fairly well described by the Redfield model despite the extremely high late winter N:P ratios observed in this region. Hence, the seasonal variability of organic matter seems to be rather independent of the ratio of inorganic nutrients. The variability of the inorganic N to P ratios in late winter and early spring across the Baltic Sea is much larger than seen from the variability of the organic matter. This suggests that other sources than DIN and DIP as sources for new nutrients in spring are used. This is true both in the Baltic proper, where an additional nitrogen source for organic matter production in spring is needed besides inorganic nitrogen, and in the Bothnian Bay, where an additional phosphorus source is needed. Nitrogen fixation by cyanobacteria that grow later in the summer in the southern Baltic Sea can not explain the additional nitrogen source needed in early spring. Future model experiments may reveal more information about the dynamics of organic matter in the Baltic Sea.

Place, publisher, year, edition, pages
SMHI , 2009. , p. 20
Series
Oceanography, ISSN 0283-7714 ; 99
Identifiers
URN: urn:nbn:se:smhi:diva-2806Local ID: Oceanografi, Rapporter, Serie OceanografiOAI: oai:DiVA.org:smhi-2806DiVA, id: diva2:948102
Available from: 2009-12-16 Created: 2016-07-08 Last updated: 2016-07-08Bibliographically approved

Open Access in DiVA

fulltext(616 kB)370 downloads
File information
File name FULLTEXT01.pdfFile size 616 kBChecksum SHA-512
60169e7e83a637bcced8575b223f7301090515b99fa66b7e208ae1090cc002c2419b8d8c7ee2aa6892d0075ea81b00c81cc61793a99e43dd3accfedcab4b5fef
Type fulltextMimetype application/pdf

Authority records

Eilola, Kari

Search in DiVA

By author/editor
Eilola, Kari
By organisation
Oceanography

Search outside of DiVA

GoogleGoogle Scholar
Total: 370 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 199 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf