|Phase 1||Phase 2||Synthesis|
|2008 - 2013||2014||2015||2016|
Field work in innermost high alpine Svalbard with Endre Før Gjermundsen. Credit: Anne Hormes.
Arctic amplification of warming up to two times the global mean is observed and modelled due to the sea ice-albedo/ocean/snow surface albedo feedback effects (IPCC 2013). This trend has further accelerated during the past decade as evidenced by both the dramatic decrease of summer sea ice cover and the increased melt rates of glaciers (i.e. Comiso et al., 2008; Kohler et al., 2007). It is expected that anthropogenic global warming is and will be superimposed on natural variability. Unfortunately, most of the Arctic instrumental measurements only extend back to mid-20th century limiting our understanding of multi-decadal and –centennial spatial and temporal natural variability in the Arctic.
The PAGES Working Group (WG) on arctic climate during the last two millennia, Arctic2k, was launched in March 2008 (read article) to generate and synthesize high-resolution paleoclimate data to assess and elucidate both the timing and variability of the Arctic climate change during this period.
The group reached two successful milestones with the data collection and temperature reconstruction expressed in the benchmark paper by the PAGES2k Consortium paper (2013) and a subsequent revision of the Arctic2k proxy database (2014).
Hjorthfjellet in Adventfjorden, Svalbard. Credit: Anne Hormes.
Learn more and participate
Subscribe to the Arctic2k mailing list here.
This group is open to anyone who is interested, to participate contact the group leader Hans Linderholm.
Next Arctic2k workgroup meeting
The next Arctic2k working group meeting will take place on Monday 13 April 2015, 17:30-20:00, in room R2 at the EGU convention.
Published: 24 November 2014
Lake sediment coring in spring 2008 on Kongressvatnet, Svalbard with Willem van der Bilt, Al Werner and Jørgen Haagensli. Credit: Anne Hormes.
New people are working in the Arctic2k group!
Published: 19 June 2014
The PAGES Arctic2k network needs your input!
Precipitation/humidity records are still severely underrepresented in the Arctic2k database. While more substantial than for precipitation, some regions, such as the Russian or Canadian Arctic still yield only very few records.
The published record should fulfill the following criteria to be included in the database:
1. Demonstrated plausible mechanistic relation to climate, but not necessarily quantitative
2. At least one numerical age per 500-year interval (a qualitative age-depth model with error bands of
<100 years will be considered)
3. At least one analysis every 200 years
4. Must span at least 500 years during the past 2k
5. Must be published in a peer-reviewed publication
6. Must be made available through the PAGES2k database at NOAA when being used for a published result in the framework of PAGES2k
Lina Gislefoss sampling late Holocene erratic boulders outside the Little Ice Age moraine in Hornsund, Svalbard. Credit: Anne Hormes.
If you are aware of records that fulfill these criteria, please contact the data managers (Dmitry Divine and Johannes Werner) to submit your data to the Arctic2k database. The data managers will instruct you on how to submit your record in the best format. All new data will first be used internally by the PAGES 2k Network and be archived publicly once a product is published.
Published: 16 June 2014
Tell us about your ongoing projects
Please, let us know about your ongoing projects for the News section of our Arctic2k web site.
Published: 16 June 2014
Comiso, J.C., Parkinson, C.L., Gersten, R. and Stock, L., (2008) Accelerated decline in the Arctic sea ice cover, Geophysical Research Letters, 35, doi:10.1029/2007GL031972.
IPCC, 2013: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Stocker, T.F. et al. (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 1535 pp.
Kohler, J., James, T.D., Murray, T., Nuth, C., Brandt, O., Barrand, N.E., Aas, H.F. and Luckman, A., (2007) Acceleration in thinning rate on western Svalbard glaciers, Geophysical Research Letters, 34, doi:10.1029/2007GL030681.
PAGES 2k Consortium (2013) Continental-scale temperature variability during the past two millennia. Nat Geosci 6: 339-346