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Effects of warmer world scenarios on hydrologic inputs to Lake Malaren, Sweden and implications for nutrient loads
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2008 (English)In: Hydrobiologia, ISSN 0018-8158, E-ISSN 1573-5117, Vol. 599, 191-199 p.Article in journal (Refereed) Published
Abstract [en]

A simple, rapid, and flexible modelling approach was applied to explore the impacts of climate change on hydrologic inputs and consequent implications for nutrient loading to Lake Malaren, Sweden using a loading function model (GWLF). The first step in the process was to adapt the model for use in a large and complex Swedish catchment. We focused on the Galten basin with four rivers draining into the western region of Malaren. The catchment model was calibrated and tested using long-term historical data for river discharge and dissolved nutrients (N, P). Then multiple regional climate model simulation results were downscaled to the local catchment level, and used to simulate possible hydrological and nutrient loading responses to warmer world scenarios. Climate change projections for the rivers of Galten basin show profound changes in the timing of discharge and nutrient delivery due to increased winter precipitation and earlier snow melt. Impacts on total annual discharge and load are minimal, but the alteration in river flow regime and the timing of nutrient delivery for future climate scenarios is strikingly different from historical conditions.

Place, publisher, year, edition, pages
2008. Vol. 599, 191-199 p.
Keyword [en]
catchment modeling, hydrologic transport, nutrient loading, climate impact assessment
National Category
Climate Research
Research subject
Climate
Identifiers
URN: urn:nbn:se:smhi:diva-881DOI: 10.1007/s10750-007-9197-8ISI: 000252890800024OAI: oai:DiVA.org:smhi-881DiVA: diva2:808056
Available from: 2015-04-27 Created: 2015-04-27 Last updated: 2017-12-04Bibliographically approved

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Samuelsson, Patrick

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