Processing ice cores in Antarctica. Credit: Nancy Bertler.
PAGES 2k Network is a long-running initiative studying past global changes of the last 2000 years.
- Further understand the mechanisms driving regional climate variability and change on interannual to centennial time scales.
- Reduce uncertainties in the interpretation of observations imprinted in paleoclimatic archives by environmental sensors.
- Identify and analyze the extent of agreement between reconstructions and climate model simulations.
The past 2000 years (the "2k" interval) provides critical context for our understanding of recent anthropogenic forcing of the climate, as well as baseline information about Earth’s natural climate variability. It also provides opportunities to improve the interpretation of paleoclimate proxy observations, and to perform out-of-sample evaluation of the climate and earth system models that are used to generate projections of future climate change.
In 2008, PAGES initiated the 2k Network to coordinate and integrate regional efforts to assemble existing proxy data and generate climate reconstructions. Nine regional groups were established during the course of the initiative, spanning eight continents and the global ocean.
Phase 1 (2008-2013) focused on generating regional temperature reconstructions. During Phase 2 (2014-2016), a number of trans-regional groups emerged from amongst the community, focusing on topical challenges such as methods development, data-model comparison, database construction, and large-scale climate. Phase 3 (2017-2021) adopted a more decentralized approach, with the 2k Network supporting a number of new and continuing projects that worked on various aspects of the climate of the past 2,000 years like mechanisms of climate variability, methods, and uncertainties, and proxy and model understanding.
Phase 4 launched in January 2022 with a new set of objectives linked primarily to the hydroclimate of the CE. Specifically, we have four main objectives providing focus for Phase 4 activities:
1. Reconstruct spatial and temporal hydroclimate variability and change over the Common Era from local to global scales.
2. Evaluate and constrain Earth system models using hydroclimate proxy data, whilst using models to inform process-level understanding of Common Era hydroclimate.
3. Develop tools and practices to maximize interoperability of 2k data products, including data sets from earlier phases.
4. Translate the science into evidence-based policy outcomes.
Recent promotional materials
> Phase 3 Poster (below) - click to enlarge
Phase 3 projects
The projects that are currently active are:
Learn more and participate
The 2k Network relies on the engagement of the wider community! There are many ways to take part:
You may contribute to an ongoing activity with your data and expertise, initiate a new 2k activity, or participate in an emerging one by contributing towards project coordination, data-analysis, interpretation or writing.
Members from related communities, including, e.g. other PAGES working groups, PMIP, WCRP scientists, are warmly welcomed to join or initiate 2k activities. We are particularly interested in participation from the modeling community to ensure that we collate hydroclimate proxy data that enables meaningful comparison with climate model outputs.
The 2k Network in its current phase will include workshops, a continuation of the successful online 2k seminar series, and engagement with the Early-Career Researcher (ECR) community. We invite researchers to get in touch if interested in giving a seminar (or with topics that they would be interested in hearing about!), to participate in database compilation, and if specific themes for workshop or hackathons are of interest.
This group is open to anyone who is interested. If you would like to participate in Phase 3 of the PAGES 2k Network or simply to receive updates, subscribe to the 2k Network mailing list here or contact a member of the coordinating committee.
2k Network circulars
Alyssa Atwood (Florida State University, USA)
Georgy Falster (Australian National University, Australia)
Ben Henley (Monash University, Australia)
Matt Jones (University of Nottingham, UK)
Lukas Jonkers (MARUM, University of Bremen, Germany)
Nikita Kaushal (ETH Zürich, Switzerland)
Helen McGregor (University of Wollongong, Australia)
Anaïs Orsi (University of British Columbia, Canada)
Hussein Sayani (SLR International Consulting, USA)