Argonne National Laboratory

A Prototype Two-Decade Fully-Coupled Fine-Resolution CCSM Simulation

TitleA Prototype Two-Decade Fully-Coupled Fine-Resolution CCSM Simulation
Publication TypeJournal Article
Year of Publication2010
AuthorsMcClean, JL, Bader, DC, Bryan, FO, Maltrud, ME, Dennis, JM, Mirin, AA, Jones, PW, Vertenstein, M, Ivanova, DP, Kim, YY, Boyle, JS, Jacob, RL, Norton, N, Craig, AP, Worley, PH
JournalOcean Modelling
Date Published11/2010
Other NumbersANL/MCS-P1766-0610

A fully coupled global simulation using the Community Climate System Model (CCSM) was configured using grid resolutions of 0.1 degrees for the ocean and ice, and 0.25 degrees for the atmosphere and land, and was run under present-day greenhouse gas conditions for 20 years. Intensified and contracted polar vortices, and too cold sea surface temperatures (SSTs) in the subpolar and mid latitude Northern Hemisphere were the dominant biases produced by the model. Intense category 4 cyclones formed spontaneously in the tropical North Pacific and the ocean response to one such event shows the realistic formation of a cold SST wake, mixed layer deepening, and warming below the mixed layer. Agulhas eddy pathways are more realistic than in equivalent stand-alone ocean simulations forced with atmospheric reanalysis.