ARCSS 2 kyr Project: A synthesis of the last 2000 years of climatic variability from Arctic lakes
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Information for Tugtutoq Lake
Tugtutoq and Qipisarqo lakes, SW Greenland. Adjacent to the Labrador Sea, these are strongly influenced by sea-surface temperatures. Year-round open water year contrasts with the Canadian side, which is frozen most of the year. The SW Greenland records complement the Baffin Island records, and collectively should record variations in Labrador Sea overturning. Tugtutoq Lake is near the Norse "Eastern Settlement" of Medieval time; existing freeze-cores are stratified with a reliable chronology back 3000 yr. Chironomid samples have already been picked and are ready for identification. We will also measure sub-lamina-scale elemental geochemistry (Fe, Ti and other tracers of terrestrial input) with scanning micro-XRF. At Qipisarqo Lake, low-resolution records of OC and chironomid-based summer temperature clearly show the late Holocene drop in summer temperature, the LIA, and 20th century recovery (Wooller et al., 2004). We will analyze pollen and chironomids at 30 yr resolution.