Understanding past climate change helps to place global warming in a long-term context and to better inform models of future change. Here, we use lake sediments from the Arctic, a region particularly sensitive to climate change, to reconstruct past climate. In 2006, a surface sediment core was obtained from the 36-m-deep basin of proglacial Big Round Lake, Baffin Island Arctic Canada. This sediment contains annually laminated couplets (varves; verified by a plutonium -239+240 profile), which are often used to reconstruct past climate. Some inconsistencies were noticed, however, when the 2006 varve thickness record was compared to nearby instrumental summer temperature records. In this study, we further test the varve thickness-summer temperature relationship by examining two additional surface cores obtained in 2007 from the deep basin adjacent to the 2006 core site. We measured varve thickness, magnetic susceptibility, and organic matter content (loss-on-ignition) in the three cores. Initial results show similar trends between cores, with some degree of variability. Variability in varve thickness could be attributed to several factors, including disturbance to the core after collection (the top varves tend to be damaged), difference in sedimentation between sites, and human error in measuring and identifying varves. To assess variance, marker beds will be identified in each core to synchronize the varve records. The next step is to compare the resulting average record to instrumental temperature data. This research shows that multiple cores collected near each other contain similar varve records; however, different sites within this lake basin do not even seem to be varved. Analysis of multiple cores from one lake allows for a more detailed view of lake sedimentation, which can then be used to more accurately infer past climate variability.