A prototype two-decade fully-coupled fine-resolution CCSM simulation

作者：McClean Julie L^*; Bader David C; Bryan Frank O; Maltrud Mathew E; Dennis John M; Mirin Arthur A; Jones Philip W; Kim Yoo Yin; Ivanova Detelina P; Vertenstein Mariana; Boyle James S; Jacob Robert L; Norton Nancy; Craig Anthony; Worley Patrick H

来源：Ocean Modelling, 2011, 39(1-2): 10-30.

DOI：10.1016/j.ocemod.2011.02.011

• Numerical modeling
• Atmospheric circulation
• Ocean circulation
• Ocean eddies
• Tropical cyclones

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 sea-ice, and 0.25 degrees for the atmosphere and land, and was run under present-day greenhouse gas conditions for 20 years. It represents one of the first efforts to simulate the planetary system at such high horizontal resolution. The climatology of the circulation of the atmosphere and the upper ocean were compared with observational data and reanalysis products to identify persistent mean climate biases. 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. A case study of 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. Too many tropical cyclones formed in the North Pacific however, due to too high SSTs in the tropical eastern Pacific. In the North Atlantic anomalously low SSTs lead to a dearth of hurricanes. Agulhas eddy pathways are more realistic than in equivalent stand-alone ocean simulations forced with atmospheric reanalysis.

• 出版日期2011