Session: Benchmarking & cross-cutting Group 1 (Isotope modelling, COMPARE)
Author: Samuel Albani / firstname.lastname@example.org / LSCE, France
Co-author: Yves Balkanski, LSCE, France;
Natalie Mahowald, Cornell University, USA;
Gislea Winckler, Columbia University, USA;
Masa Kageyama, LSCE, France;
Bette Otto-Bliesner, NCAR, USA;
Pascale Braconnot, LSCE, France;
Changing climate conditions affect dust emissions and the global dust cycle, which in turn affects climate and biogeochemistry. Natural archives show that the dust cycle experienced variability in the past in response to global and local climate change. The growing number of paleodust archives and the inclusion of the dust cycle in climate models has promoted synthesis efforts in the compilation of global dust datasets. In particular the DIRTMAP project formalized the compilation of dust mass accumulation rates, which is a quantitative metric that allows inter-comparison among different sites, among different kind of natural archives, and between models and paleodust observations.
We review our most recent efforts in reconstructing the past global dust cycle with model simulations and the compilation of a paleodust database based on dust mass accumulation rates and particle size distributions for the Holocene. We also give a perspective on ongoing work aimed at providing adequate tools for paleoclimate model validation over the full last glacial-interglacial cycle, considering that the representation of the dust cycle will be an option in the upcoming PMIP4-CMIP6 experiments. We will analyze the potential to validate time slices over key periods (e.g. mid-Holocene, LGM) and rapid transitions such as the last deglaciation.