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CSM Experiment Series b004

Introduction

Active Models: atmosphere, sea ice, land, ocean
Data Set Models: none

When run: May 1997

Models used:

  • the NCAR CCM atmosphere model, CCM3.3.3
  • the NCAR Land Surface Model, CCM3.3.3
  • the NCAR CSM Sea Ice Model, CSIM 2.1
  • the NCAR CSM (global) Ocean Model, NCOM 1.3
  • the NCAR CSM Flux Coupler, cpl4.alpha

    Synopsis:
    This was a lower resolution fully coupled run. The atmosphere and land models were at T31 resolution, while the ice and ocean models were at a nominal 3x3 degree resolution. Initial conditions for this case were taken from year 60 of case g008.02 , an ice & ocean spinup run. The b004.02 integration was halted at a 130 year integration. The b004.01 integration didn't work out, apparantly the one-hour communication interval cause an instability in the atm model.

    Computer Resources:
    This case used about 16 CPU hours per simulated year on a Cray C90 with a 4.17ns clock, and required about 35 MW of main memory.

    Table of b004.nn runs

    Date Case Description Start/End Owner
    b004 standard, lower-resolution, fully coupled run
    May 97
    thru
    Jun 97     		b004.02 cpl: cpl-4.alpha
    atm: ccm3_3_3
    lnd: ccm3_3_3
    ice: CSIM_2.1
    ocn: ocn_public_1.2 + mods
    MSS dir: /KAUFF/csm/b004.02/[ccm3,ice,ocn,cpl,log]/*
    Noteworthy:
  • this is a lower-resolution companion run to b003.nn
  • lnd model is separate from atm model
  • ice & ocn IC's: 1 Jan 61 from CSM case g008.02
  • this run was the same as b004.01 except the atm/lnd/ice communicated with the cpl every 1/2 hour
    		• 0001-01-01
    thru
    0120-01-01     		B. Kauffman
    May 97 b004.01 cpl: cpl-4.alpha
    atm: ccm3_3_3
    lnd: ccm3_3_3
    ice: CSIM_2.1
    ocn: ocn_public_1.2 + mods
    MSS dir: /KAUFF/csm/b004.01/[ccm3,ice,ocn,cpl,log]/*
    Noteworthy:
  • this is a lower-resolution companion run to b003.nn
  • lnd model is separate from atm model
  • ice & ocn IC's: 1 Jan 61 from CSM case g008.02
  • atm/lnd/ice communicate every hour (causes instability?)
    		• 0001-01-01
    thru
    0003-04-??     		B. Kauffman