SPATIO-TEMPORAL DYNAMICS IN PHYSICO-CHEMISTRY OF A HIGH ELEVATION STREAM-LAKE NETWORK
The high elevation Macun Lakes system (2600 m a.s.l.), Swiss National Park, has been monitored for physico-chemistry since 2000. Monitoring consisted of annually-collected water samples at 10 sites in the network, high frequency sampling over the field season (May til October) in 2002 and 2017, and hourly records using an Exosonde (8 sensors) from July 2016 to December 2017 (excluding March-June) at the network outlet lake. The Macun Lakes comprises two basins, one mostly groundwater/precipitation-fed and the other mostly rock-glacier fed. Basin differences existed and each basin exhibited differences in long-term trends. Long-term trends in both basins were seen for pH, nitrogen and organic carbon. The 2002/2017 data showed seasonal patterns reflected differences in inter-annual climate regimes. Here, 2017 was a wet, more productive year compared to 2002. The Exosonde data were transmitted daily by satellite and offered real-time data to Park visitors. Exosonde data were important for assessing seasonality (including winter data) and diel patterns for specific parameters such as temperature, chlorophyll, dissolved oxygen and pH. The long-term collection strategy provided important information regarding changes in water physico-chemistry in relation to local landscape attributes and climate patterns.
Chris Robinson (Primary Presenter/Author), Eawag, firstname.lastname@example.org;
Helena Vogler (Co-Presenter/Co-Author), Eawag, email@example.com;
Christian Ebi (Co-Presenter/Co-Author), Swiss Federal Institute of Aquatic Science and Technology, EAWAG, Urban Water Management dpt., firstname.lastname@example.org ;
Simon Dicht (Co-Presenter/Co-Author), Eawag, Eawag;
Tobias Ebner (Co-Presenter/Co-Author), Swiss National Park, email@example.com;