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ARPHA Conference Abstracts :
Conference Abstract
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Rolf David Vogt‡, Øyvind Kaste§, Jan-Erik Thrane‡, Areti Balkoni‡, François Clayer‡, Ann Kristin Schartau||
Corresponding author: Rolf David Vogt (rolf.david.vogt@niva.no)
Received: 09 Apr 2025 | Published: 28 May 2025
© 2025 Rolf Vogt, Øyvind Kaste, Jan-Erik Thrane, Areti Balkoni, François Clayer, Ann Kristin Schartau
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Vogt R, Kaste Ø, Thrane J-E, Balkoni A, Clayer F, Schartau AK (2025) Distinguishing the Effects of Climate Change and Acid Rain Recovery on Water Chemistry Trends: A Challenging Task? ARPHA Conference Abstracts 8: e155377. https://doi.org/10.3897/aca.8.e155377
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Abstract
This study examines whether trends in climate variables—precipitation, runoff, temperature, and actual evapotranspiration (AET)—can help explain changes in water chemistry in 78 Norwegian lakes from 1990 to 2020. AET has increased significantly in nearly all catchments, though substantial discrepancies exist between modeled and calculated values. Temperature has risen at 79% of monitoring stations, whereas precipitation and runoff exhibit significant trends in only 15% and 19% of lakes, respectively. These patterns are reflected in the limited explanatory power of climate variables for water chemistry changes. Spatial and temporal correlations between climate trends and acid rain recovery further complicate distinguishing their individual effects in simple correlation analyses. Overall, climate variables show weak explanatory power for water chemistry trends. However, multivariate redundancy analysis (RDA) provides a non-significant indication that increases in precipitation and runoff may counteract the effects of rising temperatures on water chemistry.
Keywords
Climate impact, acid rain recovery, trends in water chemistry, statistical analysis
Presenting author
Rolf D. Vogt
Presented at
ORAL
Hosting institution
Norwegian Institute for Water Research (NIVA), Norwegian Institute for Nature Research (NINA)