8000 Years of Climatic Variability from Arctic lakes


This collaborative project focuses on lacustrine sediments for high-resolution proxy climate records of the past 8000 years. Lakes are the most widely distributed sources of proxy climate records that consistently extend through the post-glacial interval. The study sites include two focus regions: eastern Beringia and the NW Atlantic. This study contributes to the long-term perspective on natural climate variability that is needed to understand historically unprecedented changes now occurring in the Arctic. Rapid changes in the Arctic climate system that occurred in the relatively recent past can be compared with the output of climate models to improve the understanding of the processes responsible for nonlinear system change. This study focuses on the transition between the Holocene thermal maximum (HTM) and the onset of Neoglaciation, and on the step-like changes that occurred subsequently during the late Holocene. This study builds on the “2000 years of climate variability of arctic lakes” project. The Icelandic part of this collaboration is supported by RANNIS (Grant from the Icelandic Research Council 2009-2012 to Áslaug Geirsdóttir and Gifford H. Miller): Testing the stability of Holocene climate in Iceland