The 5th workshop of the NECLIME working group on climate was once again online. This year it was organized by Andrea Kern and Thomas Kenji Akabane. The workshop had 37 participants including many young scientists - a potential benefit of the online format serving those without travel funds. The main purpose of the workshop was to discuss the potential and limitations of new methods for paleoclimate reconstructions for Quaternary and Neogene datasets on a global scale. A special focus of the meeting was new method that use probability density functions to detemine climate. Comparisons were made with the Coexistence Approach and non-plant proxy data . A second scientific focus lay on the impact on CO2 on plant-based palaeoclimate reconstructions and how this can be accessed through time. I contributed to the discussions with a synthesis and extension of the climate work conducted at Beaver Pond, on Ellesmere Island, over the last couple of decades. At this site, out many lines of evidence allow comparison of climate reconstructions based on wood isotopes, mollusck isotpes, beetle communities, macrofossil plant communities (both PDF and envelope methods), pollen and non-pollen palynomorphs, diatoms, and geochemical methods using bacterial membrane lipids. Fletcher, T. 2022. A Beaver Pond frozen in time: Multi-proxy analysis in the Pliocene High Arctic. NECLIME workshop on climate. 21st–22nd February. A detailed report is available here and on the on the NECLIME website including preliminary considerations on the use of CRACLE and CREST for paleoclimate reconstructions, references, and links to useful R packages.
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ProjectClouds cause the greatest uncertainty in climate models, but we currently have no way of testing cloud model performance in a climate with higher CO2 than the historical records. Palaeontology gives us access to such a past, but currently, we don't have a method to reconstruct cloud in deep time. Archives
June 2023
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