The ICE age Chemistry And Proxies (ICECAP) model is a combination of (1) a global climate model (GISS ModelE), (2) and equilibrium global terrestrial vegetation model (BIOME4), (3) a stratospheric chemistry model (LINOZ), and (4) a global chemical transport model (GEOS-Chem).  The primary goal of this project is to investigate the variability in the oxidation capacity of the atmosphere on the preindustrial-industrial and glacial-interglacial time scales.  The model calculates the oxygen isotopic composition of sulfate and nitrate, observations of which can be used to assess model performance.

People:

Becky Alexander (lead P.I.) and Eric Sofen (graduate student) (UW)

Loretta Mickley (co-P.I.), Lee Murray (graduate student) and Amos Tai (graduate student) (Harvard)

Jed Kaplan (subcontract) (U. Lausanne)

Funding:

NSF AGS 0704169

Publications so far:

Sofen, E.D., B. Alexander, and S.A. Kunasek, The impact of anthropogenic emissions on atmospheric sulfate production pathways, oxidants, and ice core Δ¹⁷O(SO₄^2-), Atmos. Chem. Phys., 11, 3565-3578, doi:10.5194/acp-11-3565-2100 (2011).