Anderson, J. . Geological Survey of Denmark & Greenland, nja@geus.dk

 
SETTING BASELINES FOR FUTURE CHANGES IN ARCTIC LAKES: LIMNOLOGICAL AND PALAEOLIMNOLOGICAL INVESTIGATIONS OF LAKES IN THE KANGERLUSSUAQ AREA OF WEST GREENLAND
 
Little or nothing is known about the many lakes in West Greenland. To understand their relationship to climate and hence how they might respond to possible future changes, we have sampled a transect of 70 lakes from the ice sheet to the outer coast in the Kangerlussuaq area (67 N). This transect represents a climate gradient from continental conditions near the ice sheet to maritime conditions at the coast. The geology is relatively uniform and anthropogenic impacts are low, making them suitable for studying lake-climate interactions. The extent to which these lakes are influenced by anthropogenic pollutants is being assessed by analyses of Hg and SCPs. Some of the lakes, in a zone ca. 30-40 km out from the ice sheet have high conductivities, reflecting the low precipitation-evaporation ratios in this area, and evidence of fossil shorelines also indicates the sensitivity of these lakes to past-climate changes. We are also using palaeolimnological analyses to assess the extent of recent changes compared to changes associated with lake ontogeny since deglaciation. Results of the limnological survey will be presented together with biological and chemical analyses of dated-sediment cores, in an attempt to define baselines against which future changes can be compared.
 
Day: Tuesday, Feb. 2
Time: 03:30 - 03:45pm
Location: Eldorado Hotel
 
Code: SS15TU0245E