Session: Benchmarking & cross-cutting Group 1 (Isotope modelling, COMPARE)
Author: Basil A. S. Davis / firstname.lastname@example.org / University of Lausanne
Co-author: Manuel Chevalier, University of Lausanne;
Kenji Izumi, LSCE/IPSL;
Philipp Sommer, University of Lausanne;
Achille Mauri, EU Joint Research Centre;
Jed O. Kaplan, University of Lausanne;
One key aspect to understanding current data-model discrepancies during the Holocene, and for earlier time periods, is the role of atmospheric dynamics. This requires spatially and seasonally resolved reconstructions of past climate at large enough spatial scales to reveal the impact of changes in the strength and direction of the atmospheric circulation on the pattern of surface climate anomalies. The HORNET project is currently fulfilling this aim by utilizing over 3000 pollen records from across the Northern Hemisphere extra-tropics to produce a gridded record of summer and winter climate for the entire Holocene based on a standardized reconstruction and error-accounting methodology. This new reconstruction provides a basis for benchmarking both equilibrium and transient model simulations of Holocene climate, including the ability of models to reproduce the changing seasonal and spatial distribution of surface heat and moisture during Interglacial warming.