GFDL Particpiation in CliPAS Seasonal/Intra-Seasonal Hindcast Study  (July 2006)


Experimental Design

1) Experimental Period
    1979 - 2005, 12 month predictions from Feb 1, May 1, Aug 1, and Nov 1

2) Ensemble
    10 members from ICs chosen evry 12 hours as follows:
    Feb 1 = Jan27h12 -> Feb01h0;
    May 1 = Apr26h12 -> May 1h0
    Aug 1 = Jul27h12 -> Aug01h0
    Nov 1 = Oct27h12 -> Nov 1h0

3) GCM
    A) Atmosphere only (Tier 2) AM2.1-  finite volume core,  2 x 2.5 deg. lat x lon, 24 vertical levels (hybrid)
          SSTs from CM2.1 hindcasts (see "B" below)
       Status - expected start ~ Early August 2006
       Reference:
       The GFDL Global Atmospheric Model Development Team, 2004: The new GFDL global atmosphere and land model AM2-LM2:               Evaluation with prescribed SST simulations. Journal of Climate, 17(24), 4641-4673.

 
   B) Coupled (Tier 1) CM2.1 - atmospheric component as per "A"; Ocean GCM is MOM4 with 1 x 1 deg lat x lon, poleward of 30 deg, reducing      to 1/3 x 1/3 deg at the equator, 50 vertical levels
     Status - In progress
      References:
      Delworth et al., 2006: GFDL's CM2 Global Coupled Climate Models. Part I:  Formulation and simulation characteristics. Journal of         Climate, 19(5), 643-674
       http://www.gfdl.noaa.gov/~fms/pubrel/k/mom4/doc/mom4_manual.html

    C) Earlier completed Tier 2 hindcasts with AM2.0 (b-grid core) for summer and winter as per APCN experimental description at:
          http://ces.snu.ac.kr/apcn/main.htm


Model Output [list still being updated]

Monthly

U,V,T,sphum,voricity,divergence,omega,ps,T2m,precip,precip_ls,precip_conv,cloud_amts,high_cld,mid_cld,low_cld,tot_cld, olr, (additional sfc fluxes), +

Daily

U,V,T,sphum,voricity,divergence,omega,ps,T2m,precip,olr, (additional sfc fluxes), +

3 hourly

T,sphum, ps, T2m, precip, lw_sfc, sw_sfc