Session: Benchmarking & cross-cutting Group 1 (Isotope modelling, COMPARE)
Author: Allegra N. LeGrande / firstname.lastname@example.org / NASA GISS
Co-author: Anders E. Carlson, COAS Oregon State University;
David Ullman, Northland College;
Jesse Nusbaumer, NASA GISS;
Water Source and Isotope changes through the Deglaciation and Holocene
A.N. LeGrande, A.E.Carlson, D.Ullman, J. Nusbaumer
The deglacial period saw radical shifts in climate across the globe. Water isotopologues provide some of the most wide spread proxy archives of these climate changes. Here we present new analyses on a suite of 12 water isotope-enabled coupled atmosphere-ocean GCM simulations from GISS ModelE-R that span 24kya to the pre-industrial. We show how millennial scale co-variability in water isotopes and climate (temperature, precipitation, humidity, and moist-static energy) is distinct from regional scale spatial slopes, consistent with proxy archives (e.g., Cuffey et al 1995). We supplement this set of simulations with a new ensemble of deglacial simulations that contain a complementary suite of tracers that determine moisture provenance changes through the deglaciation.