Dittrich, M. Swiss Federal Institute for Enviromental Science and Technology , Limnological Research Center, maria.dittrich@eawag.ch
Wang, Y. Swiss Federal Institute for Enviromental Science and Technology , Limnological Research Center, ying.wang@eawag.ch
Müller, B. Swiss Federal Institute for Enviromental Science and Technology , Limnological Research Center, beat.mueller@eawag.ch
Wehrli, B. Swiss Federal Institute for Enviromental Science and Technology , Limnological Research Center, wehrli@eawag.ch

 
CALCITE DISSOLUTION IN A STRATIFIED LAKE - A STUDY BY MICROELECTRODES AND MODELING
 
Fine scale pore water profiles of pH, carbonate and calcium were measured in-situ with microelectrodes in the Lake Sempach (Switzerland). A numerical model including diffusion, convection and reaction terms is applied to the data to characterize the calcite dissolution process near the sediment-water interface. The total carbon dioxide concentration reflects the organic matter degradation and the calcite dissolution in the model. The calcite dissolution was described taking into account the size distribution of calcite crystals. The mechanisms driving the calcite dissolution are discussed and the calcite dissolution rates are compared with independent studies of pore-water profiles at this location.
 
Day: Tuesday, Feb. 2
Time: Poster
Location: Sweeney Center
 
Code: SS06TU0360S