GMI Capabilities Sarah Strode, Jose Rodriguez, Steve Steenrod, Junhua Liu, Susan Strahan, Eric Nielsen.

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Presentation transcript:

GMI Capabilities Sarah Strode, Jose Rodriguez, Steve Steenrod, Junhua Liu, Susan Strahan, Eric Nielsen

Model Information The Global Modeling Initiative (GMI) CTM includes the following: Stratospheric & tropospheric chemistry with 124 species (including the reactive nitrogen species & oxidants measured by Atom), >400 reactions Diagnostics for individual reaction rates Output for specific station locations Specialized tracers including e90, idealized lifetime tracers, tendencies due to chemistry/advection/etc.

Recent GMI Simulations Suite of Long Hindcast simulations: 1990-2012 with time-dependent fossil fuel & biomass burning emissions 1990-2012 with fixed emissions 1979-2012 CCMI hindcast ATom simulations: 1x1.25 degree horizontal resolution, 72 levels (~30 from 0-12km) Meteorology from MERRA (MERRA2 coming soon) Hindcasts possible within 1-3 months of met field availability

Recent Science Highlights Strode et al. (submitted) GMI Hindcast with time-dependent emissions captures observed changes in the annual cycle of U.S. surface O3. Strahan et al. (2014) GMI results suggest that the IAV of tropospheric ozone over Reunion is mainly driven by the IAV of stratospheric contribution. Inorganic chlorine causes ozone depletion but its level inside the vortex is not measured. We inferred chlorine levels during the past decade using a method that combines MLS N2O data and the time-dependent N2O/Cly correlation determined by the GMI Hindcast. O3 mixing ratio (ppb) StratO3/O3 (%) Liu et al. (in prep) Year

Preliminary ATom Results Prod or Loss (Mmol/day) [NOx] (ppt) Latitude

Relationship to GEOS-5 The GMI chemical mechanism is also included in the GEOS-5 Chemistry Climate Model (GEOSCCM) GEOS-5 can run as a free-running GCM, “replay” to a reanalysis, or run as a CTM (GEOS-CTM) Can use recently produced met fields High resolutions (up to 1/8 degree) are possible

High Resolution GEOSCCM Result