PAGES - Past Global Changes

New ACME working group

Details: Published: Thursday, 11 July 2019 13:51

PAGES is pleased to announce the launch of the new working group Arctic Cryosphere Change and Coastal Marine Ecosystems (ACME).

The aim of this working group is to assess and refine available marine proxies that can be used to reconstruct past cryosphere changes and their ecosystem impacts. A particular focus will be placed on the techniques and the quality of data, and on the establishment of new protocols to enable more reliable reconstructions, through close dialogue with numerical ecologists and environmental monitoring community.

Find out more about ACME, and join its mailing list, here.

Climate and cave drip water

Details: Published: Monday, 08 July 2019 17:36

The world's first global analysis, based on data from 163 drip sites in 39 caves across five continents, has found that stalagmites can assist in tracking past rainfall patterns.

Andy Baker et al.'s recent paper in Nature Communications investigates how climate affects the oxygen isotope composition of cave drip water.

Ideas in this paper were developed thanks to discussions with members of PAGES' SISAL working group. Find out more about SISAL, and sign up to the mailing list, here.

Spanish funding success

Details: Published: Thursday, 27 June 2019 15:35

csic ibcc lo2k fig 19 PAGES congratulates 2k Network coordinator Belen Martrat on the recently announced success of her Spanish funding proposal.

Martrat's successful I-LINK proposal, through the national scientific research council (CSIC), is for the IBCC-lo2k project (IBerian Climate Change paleoarchive - synthesis and stewardship of land-ocean data, taking the past 2000 years (2k) as a reference).

The common objective of the project is to synthesize and preserve the climate measurements of the past, integrating land and ocean data of the Iberian region, taking the historical period (last 20 centuries) and beyond as a reference to connect with the instrumental data, in a global context of climate change.

Read the latest e-news

Details: Published: Wednesday, 19 June 2019 16:18

Read about the latest PAGES' news, meetings and opportunities from around the world in this month's e-news.

Highlights include the full chronological listing of PAGES sessions at the 20th INQUA Congress in July, the new "Find data" website tab, PAGES working group news and meeting announcements, recent products, IPCC updates, ECN updates, and other announcements.

GCD used in Amazonia paper

Details: Published: Wednesday, 19 June 2019 12:17

A new Nature Ecology & Evolution paper uses PAGES' Global Paleofire Working Group's Global Charcoal Database to show climate change had a significant impact on indigenous Amazonian communities before the arrival of Europeans in 1492.

Jonas Gregorio de Souza et al. review the most relevant cultural changes seen in the archaeological record of six different regions within Greater Amazonia during late pre-Columbian times. They compare the chronology of those cultural transitions with high-resolution regional palaeoclimate proxies to show that, while some societies faced major reorganization during periods of climate change, others were unaffected and even flourished.

Access the paper "Climate change and cultural resilience in late pre-Columbian Amazonia" here.

Access the Global Charcoal Database here.

Find out more about the Global Paleofire Working Group 2 here.

Ocean circulation, CO2 paper

Details: Published: Monday, 17 June 2019 13:50

A recent Science Advances paper from members of PAGES' Ocean Circulation and Carbon Cycling (OC3) working group aims to accurately quantify ocean carbon components to measure carbon dioxide (CO2) concentrations during glacial periods.

The prevailing hypothesis for lower atmospheric CO2 concentrations during glacial periods is an increased efficiency of the ocean’s biological pump. However, tests of this and other hypotheses have been hampered by the difficulty to accurately quantify ocean carbon components.

Authors Samar Khatiwala, Andreas Schmittner and Juan Muglia use an observationally constrained Earth system model to precisely quantify these components and the role that different processes play in simulated glacial-interglacial CO2 variations.

Paleo contents, IPCC AR6 FOD

Details: Published: Thursday, 23 May 2019 18:42

Download the excel document (22.7KB) here.

PAGES would like to bring to your attention an opportunity to review the first-order draft (FOD) of the Intergovernmental Panel on Climate Change (IPCC) Working Group 1 (WG1) contribution to IPCC's Sixth Assessment Report (AR6).

To facilitate your review of paleoclimate information in the FOD, PAGES and its Early-Career Network (ECN) have assembled a table listing the paleo contents from across the report. Download the excel document shown above.

AR6 does not have a chapter dedicated to paleoclimate. Instead, paleo information is integrated throughout the report. The table of contents will help you locate text and evaluate possible inconsistencies, gaps and overlaps across the chapters. It also highlights sections that contain assessment statements using IPCC controlled vocabulary (e.g. "high confidence"). These key statements are often featured in the Executive Summaries, which feed the Summary for Policy Makers.

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