Project history and plans

ARCSS 2k project
This project builds on the recently concluded Arctic lakes 2 ka project, which ran from 2005 to 2009, and was funded mainly by the NSF’s Arctic System Science Program to study proxy climate records from Arctic lakes that extend back 2000 years. A special issue of the Journal of Paleolimnology (January 2009, v. 41-1) features 14 papers with new records of Holocene climate and environmental change based on sediments from Arctic lakes. These include some of the longest and highest-resolution records currently available from the Arctic. Of the new proxy records, six were resolved at sub-decadal to annual scale and were integrated with records from trees and glaciers to reconstruct Arctic summer temperature for the last 2000 years and to compare with the output of a climate model. The proxy data and geochronology for all records published in the special issue are available on-line through the World Data Center for Paleoclimatology.

ARCSS 8k project — Nonlinearities in the Arctic climate system during the Holocene
This three-year project (2010-2013) expands the network of high-resolution, 2000-year-long proxy records and it extends further through the post-glacial period to include the Holocene Thermal Maximum and the transition to the Neoglaciation. The goal is to determine whether Holocene step-like climate transitions were coherent across the Arctic, and the constraints that such patterns provide on understanding the nonlinearity of Arctic system response to different forcings.


  • 2010: develop proxy time series
  • 2011: publish results — Deadline for JoPL Special Issue is August 31, 2011
  • 2012: participate in syntheses

All interested scientists with new Holocene proxy records from the Arctic are encouraged to submit a paper for a special issue. The deadline for manuscript submissions is August 31, 2011.

Project meetings
The first project meeting was held in San Francisco in December 2009

The second project meeting was held in San Francisco in December 2010