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Subprogram C1: Acidification  
Tools for Modelling the Recovery of Forest Soils and Surface Waters from Acidification  
The overall goal is to assess spatial and temporal aspects of recovery of forest soils and aquatic ecosystems from acidification, by means of dynamic biogeochemical modelling that makes use of the extensive environmental monitoring data available in Sweden. The assessment should provide input to the CLRTAP activities to develop cost-efficient emission reduction strategies that account for the dynamics of ecosystem recovery.

The methodology rests on mathematical biogeochemical models that account for the dynamics of aquatic and terrestrial ecosystem response to reduced acid deposition. The input data to the models consists of detailed site specific data from the covered catchment experiment at Gårdsjön and nation wide environmental monitoring data on which the model assessments of the regional dynamics of acidification recovery are based upon.

The focus of the project is:

· Different deposition scenarios supplied by IIASA will be used in a regional dynamic application of the SAFE model to forest soils in Sweden.

· The covered catchment experiment was modelled with both MAGIC and SAFE. The dynamic model MAGIC were used to make a regional dynamic assessment of stream water chemistry and lakes in Sweden, using different deposition scenarios.

Mattias Alveteg
Lund University
mattias.alveteg@chemeng.lth.se