NF2006to2008r164

Purpose of simulation: Model validation for the Arctic under PD conditions

Contact person: Alf Kirkevåg (alf.kirkevag@met.no)

Revision Number: r164

Production computer used: Cray XT6 in Bergen (hexagon)

Production date: October 2013

Storage locations: NorStore (/norstore_osl/projects/NS2345K/noresm/cases/NF2006to2008r164/)

MET Norway (/vol/fou/atmos/alfk/aerocomA2ny/aerocom.CAM4-Oslo.AEROCOM_A2.CTRL/)

Storage space: 9 (?) Gb at NorStore, 25 (?) Gb at MET Norway (local external disk)

Projects: EarthClim/ACCESS

Publications:

Papers in preparation: Glantz et al. (submitted)

Simulation name(s): NF2006to2008r164

Compset name used: NF_2006-2008_AER_AMIP_OBS

Model type: Stand-alone cam (atmosphere) default with prescribed ocn/ice (ocean and sea-ice)

Type of run: Branch

Simulation period: 3 years

Spin-up period: 0 years in the branch run itself, but continued from 1979-2005

Ensemble runs: No

Resolution: f19_f19 = 1.8×2.5

Emission year(s): 2006 (AeroCom-A2.CTRL), 1850 (AeroCom-A2.PRE), 2006 but with aerosol extiction set to 0 (AeroCom-A2.ZERO). For X = 2006preY all emissions are for year 2006, except that 1850 emissions are used for: SO2 and SO4 in the Y = SO4 experiment, fossil fuel BC / OC in the Y = ffBC / ffOC experiment, and biomass BC and OC in the Y = bbBCOC experiment.

Emission inventories IPCC AR5 RCP8.5 emissions (aerosols and precursors) for year 2006-2008

Frequency for output: Monthly

Active/changing forcing agents: In principle, direct and indirect (1. & 2.) effects by anthropogenic SO4, POM and BC, but aerosols were run offline (not affecting the meteorology)

Tuning parameters which are changed relative to the host model CAM4:

rhminl: 0.90 lower RH threshold for formation of low stratiform clouds (0.91 in CAM4)

critrp: 5.0 mm/day maximum prcipitation rate for suppression of autoconversion of cloud water (0.5 mm/day in CAM4)

r3lc: 14 um critical mean droplet volume radius for onset of autoconversion (10 um in CAM4)