Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Swedish National Report on Eutrophication Status in the Kattegat and Skagerrak OSPAR ASSESSMENT 2002
SMHI, Samhälle och säkerhet.
2003 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

Long time series covering the last 30 years show that with few exceptions the environmental conditions has not improved in Skagerrak and Kattegat since the 1970s. One exception is that the levels of DIP decreased during the 1990s and reached the same level as in the 1970s. However, it is difficult to evaluate the statistical significance of this trend. A general point of view which supports the conclusion about a decrease in DIP is that even though the river runoff during the period 1998 to 2000 approached the runoff found during 1985 to 1988, the DIP concentrations is not as high during 1998-2000 as compared to 1985-1988. Another parameter, which indicates a reversal of the inferior environmental conditions, is the deepwater oxygen concentration in Kattegat during the 1990s. However, the situation is far from acceptable, since this area is still severely affected by seasonal hypoxia. The monitoring data show that concentrations of DIP, DIN, deepwater oxygen and to some extent chlorophyll a co-vary with the variations in runoff from adjacent land areas, which in turn are related to the nutrient load. Periods of high runoff to the Swedish West Coast and the Baltic Sea rise the levels of the above mentioned parameters, whereas the concentrations decrease during dry periods. Typically, these periods are lasting for some years forcing the DIP, DIN, deepwater oxygen and Chlorophyll a to vary with an amplitude of approximately with 0.1 µM, 1 µM, 1 mg/l and 1 µg/l, respectively. The assessment clearly indicates that the Swedish parts of the Kattegat and Skagerrak are affected by eutrophication. Several of the investigated parameters in this assessment points towards eutrophication, such as for zoobenthos, organic carbon and nitrogen in sediments, some macroalgae, plankton, nutrients, oxygen, chlorophyll and algae toxins. The anthropogenically-derived nutrients brought to the two sea areas have origin both from domestic and transboundary sources. Due to the complex hydrographic situation in the Kattegat and Skagerrak with huge exchanges of water masses from the North Sea and the Baltic Sea as well as high atmospheric nitrogen deposition (cf. Table 7), Swedish abatement measures will only affect the Swedish coastal area. At present there are no clear signs that the eutrophication status in the two sea areas will improve in the near future.

sted, utgiver, år, opplag, sider
SMHI , 2003.
Serie
RO, Rapport Oceanografi, ISSN 0283-1112 ; 31
Identifikatorer
URN: urn:nbn:se:smhi:diva-2800Lokal ID: Oceanografi, Rapporter, Serie ROOAI: oai:DiVA.org:smhi-2800DiVA, id: diva2:948096
Tilgjengelig fra: 2003-11-04 Laget: 2016-07-08 Sist oppdatert: 2016-07-08bibliografisk kontrollert

Open Access i DiVA

fulltekst(10157 kB)355 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 10157 kBChecksum SHA-512
7ca4019bd5a66ad83a90891203000fcf0097a2ece4d5db6480351cdbc57352b2ffade044df6fcd776be0c062a113c11b8bb3d30b1659318eab0708a59c8742cc
Type fulltextMimetype application/pdf

Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 355 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 38 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.7
|