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Forskningsartikel2014Vetenskapligt granskadÖppen tillgång

Long-term trends in water chemistry of acid-sensitive Swedish lakes show slow recovery from historic acidification

Futter, Martyn; Valinia, Salar; Löfgren, Stefan; Köhler, Stephan; Fölster, Jens

Sammanfattning

Long-term (1987-2012) water quality monitoring in 36 acid-sensitive Swedish lakes shows slow recovery from historic acidification. Overall, strong acid anion concentrations declined, primarily as a result of declines in sulfate. Chloride is now the dominant anion in many acid-sensitive lakes. Base cation concentrations have declined less rapidly than strong acid anion concentrations, leading to an increase in charge balance acid neutralizing capacity. In many lakes, modeled organic acidity is now approximately equal to inorganic acidity. The observed trends in water chemistry suggest lakes may not return to reference conditions. Despite declines in acid deposition, many of these lakes are still acidified. Base cation concentrations continue to decline and alkalinity shows only small increases. A changing climate may further delay recovery by increasing dissolved organic carbon concentrations and sea-salt episodes. More intensive forest harvesting may also hamper recovery by reducing the supply of soil base cations.

Nyckelord

Acidification; Recovery; Sweden; Base cation decline; Acid neutralizing capacity; Dissolved organic carbon

Publicerad i

AMBIO: A Journal of the Human Environment
2014, volym: 43, nummer: 1 Supplement, sidor: 77-90
Utgivare: SPRINGER

SLU författare

Associerade SLU-program

Sjöar och vattendrag
Försurning
Använder FOMA data
SLU Future Forests

Globala målen (SDG)

SDG6 Rent vatten och sanitet för alla

UKÄ forskningsämne

Miljövetenskap
Skogsvetenskap

Publikationens identifierare

  • DOI: https://doi.org/10.1007/s13280-014-0563-2

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/64216