Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
Long-term trends in Secchi depth in the Baltic Sea
SMHI, Research Department, Oceanography.
1996 (English)In: Limnology and Oceanography, ISSN 0024-3590, E-ISSN 1939-5590, Vol. 41, no 2, 346-351 p.Article in journal (Refereed) Published
Resource type
Text
Abstract [en]

Nutrient loads to the Baltic Sea have increased during the last century, and primary production has probably also risen. However, the evidence of such a rise is circumstantial, and most of the available findings concerning primary production cover only brief time periods. A more appropriate type of data in this area is Secchi disk measurements. We present the results of trend tests applied to Secchi depth values recorded during two discrete time periods: 1919-1939 and 1969-1991. We performed a step trend test to compare the data from the two periods and applied a monotonic trend test to the later series. Both tests showed that Secchi depth decreased by similar to 0.05 m yr(-1) during both periods. Calculations of changes in chlorophyll concentrations suggest a yearly increase of similar to 1%. Extending the calculations to represent primary production indicates an increase of slightly <1% yr(-1). These calculations, however, are unreliable due to substantial uncertainty regarding the relationships between Secchi depth and chlorophyll concentration and chlorophyll and primary production.

Place, publisher, year, edition, pages
SWEDISH METEOROL & HYDROL INST, S-60176 NORRKOPING, SWEDEN., 1996. Vol. 41, no 2, 346-351 p.
National Category
Oceanography, Hydrology, Water Resources
Research subject
Oceanography
Identifiers
URN: urn:nbn:se:smhi:diva-1641ISI: A1996UK85000016OAI: oai:DiVA.org:smhi-1641DiVA: diva2:897774
Available from: 2016-01-26 Created: 2015-12-22 Last updated: 2016-04-05Bibliographically approved

Open Access in DiVA

No full text

By organisation
Oceanography
In the same journal
Limnology and Oceanography
Oceanography, Hydrology, Water Resources

Search outside of DiVA

GoogleGoogle Scholar

Total: 13 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
v. 2.25.0
|