By Manuel Chevalier
Saturday, 3 rd December
9:00 – 14:00

The CREST (Climate REconstruction SofTware) technique is a flexible probabilistic tool for reconstructing climate from palaeoecological datasets (e.g. pollen, rodents, forams) that has been successfully employed to reconstruct multiple climate parameters (e.g. temperature, precipitation, moisture index) from different regions (e.g. South Africa, Colombia, Turkey). In contrast to the more commonly-used reconstruction techniques, such as the Modern Analogues or all the regression-based techniques that require extensive collections of modern proxy samples to produce reliable reconstructions, CREST uses modern proxy occurrence data to estimate the proxy-climate relationships (e.g. using sources like the GBIF database (Global Biodiversity Information Facility). Capitalizing on these abundant and freely available data, CREST is thus more broadly applicable, making it an effective tool to produce climate quantifications in regions where these remain unmistakably absent. o facilitate its use by the global community, CREST is now encapsulated in a dedicated R package crestr that includes calibration data for four terrestrial and two marine proxies. In particular, the depth and richness of the plant calibration dataset enable its use on virtually any pollen record on the planet.

To introduce the package and provide guidelines to produce high-quality climate reconstructions, an in-person workshop is organized. In detail, this workshop pretends: 1) to describe the fundamental theory that underpins the model, 2) demonstrate how the different R functions of the package can be parameterised to best model the data and 3) help participants use their datasets and produce preliminary reconstructions. Basic knowledge in R is preferable but not necessary to participate in the workshop. Details about the method and package can be found here: https://mchevalier2.github.io/crestr/index.html

This in-person one-day workshop, organized in collaboration by PAGES-ECN and IPA-ECN, is intended to reach ECRs interested in quantitative paleoclimate reconstructions just after the IAL-IPA meeting which will be carried out in Bariloche. The workshop will be held on Saturday, 3 rd December with a duration of 5 hrs (9:00 – 14:00), with a theory and practice part for the participants.

The pre-registration will be by google form ( https://forms.gle/Vp7351UTbvcf6yJFA )  until September 16, 2022