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OCEAN-ONLY SIMULATIONS WITH CORE-II

OCEAN-ONLY SIMULATIONS WITH CORE-II. x2 NCOM. x1 POP. Forcing. 1958-1997. 1958-2000. # of cycles. 4. 3. Initial conditions. x3 spin-up. Levitus T & S, state of rest. Sea-ice. STR climatology. SSM/I data set.

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OCEAN-ONLY SIMULATIONS WITH CORE-II

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  1. OCEAN-ONLY SIMULATIONS WITH CORE-II x2 NCOM x1 POP Forcing 1958-1997 1958-2000 # of cycles 4 3 Initial conditions x3 spin-up Levitus T & S, state of rest Sea-ice STR climatology SSM/I data set strong restoring w/ 386 W m-2 K-1 and 2770 mg m-2 s-1 psu-1 + frazil ice formation no restoring, w/ frazil ice formation and diagnosed ice-ocean freshwater fluxes Under ice forcing weak restoring in ice free regions w/ 23 mg m-2 s-1 psu-1 (hor.-mean subtracted) weak restoring everywhere w/ 11.5 mg m-2 s-1 psu-1 (hor.-mean subtracted) Salinity restoring adjusts yearly based on S change (~1.11) no runoff adjusts yearly based on S change (~1.01) with runoff Precipitation factor

  2. TEMPERATURE TRENDS (x2 NCOM)

  3. INITIAL CONDITION SENSITIVITY (x2 NCOM) Sufficient historical data are not available to fully initialize an ocean simulation in 1958, and the repeat cycle forcing necessarily introduces errors because of inappropriate initial conditions. Perform a 10-year branch integration for model years 121-130 replacing the end of model year 120 fields with data from model year 113 (labeled as IC). CONTROL – IC RMS DIFFERENCE PROFILES (GLOBAL)

  4. x1 POP SOLUTIONS AT: http://www.cgd.ucar.edu/oce/yeager/gx1v3.html (case name: gx1v3.210) ATLANTIC TEMPERATURE TREND ATLANTIC SALINITY TREND oC psu YEAR YEAR

  5. MERIDIONAL OVERTURNING CIRCULATION (x1 POP) NORTHWARD HEAT TRANSPORT (x1 POP)

  6. WOCE SECTION P18 TEMPERATURE & SALINITY COMPARISONS WOCE WOCE x1 POP x1 POP

  7. Partial list of publications that use the inter-annually forced simulations Doney, S.C., S. Yeager, G. Danabasoglu, W.G. Large, and J.C. McWilliams, 2003: Modeling global oceanic inter-annual variability (1958-1997): Simulation design and model-data evaluation. NCAR/TN-452+STR. Doney, S.C., S. Yeager, G. Danabasoglu, W.G. Large, and J.C. McWilliams, 2007: Mechanisms governing interannual variability of upper-ocean temperature in a global hindcast simulation. J. Phys. Oceanogr., v37, 1918-1938. McWilliams, J.C., and G. Danabasoglu, 2002: Eulerian and eddy-induced meridional overturning circulations in the tropics. J. Phys. Oceanogr., v32, 2054-2071. Yeager, S., and W.G. Large, 2004: Late-winter generation of spiciness on subducted isopycnals. J. Phys. Oceanogr., v34, 1528-1547. Yeager, S., and W.G. Large, 2007: Observational evidence of winter spice injection. J. Phys. Oceanogr. (in press). Capotondi, A., M. Alexander, C. Deser, and M.J. McPhaden, 2005: Anatomy and decadal evolution of the Pacific subtropical-tropical cells (STCs). J. Climate, v18, 3739-3758. Capotondi, A., M. Alexander, C. Deser, and A.J. Miller, 2005: Low frequency pycnocline variability in the Northeast Pacific, J. Phys. Oceanogr., v35, 1403-1420. Large, W.G., and G. Danabasoglu, 2006: Attribution and impacts of upper-ocean biases in CCSM3. J. Climate, v19, 2325-2346. Gent, P.R., F.O. Bryan, G. Danabasoglu, K. Lindsay, D. Tsumune, M.W. Hecht, and S.C. Doney, 2006: Ocean chlorofluorocarbon and heat uptake during the twentieth century in CCSM3. J. Climate, v19, 2366-2381. Deser, C., A. Capotondi, R. Saravanan, and A. Phillips, 2006: Tropical Pacific and Atlantic climate variability in CCSM3. J. Climate, v19, 2451-2481. I I I I I

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