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======  aerocomA2noresm_r128_X ======

===== Model-run description for the full set of AeroCom A2 simulations with CAM4-Oslo (NorESM1-M) =====

**Purpose of simulation:**  Model documentation and validation for PD conditions, participation in AeroCom Phase 2 and IPCC AR5

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

**Data owner:**             Alf Kirkevåg (alf.kirkevag@met.no)

**Revision Number:**        r128  

**Production computer used:** Cray XT3 in Bergen (hexagon)

**Production date:**        August 2010 

**Ensemble runs:**          No    

**Storage locations:**      NorStore (/norstore_osl/projects/NS2345K/noresm/cases/aerocomA2noresm_r128/) 
                        
aerocom-users (/metno/aerocom/users/aerocom1/CAM4-Oslo-Vcmip5.A2.CTRL) 

**Storage space:**          289 Gb at NorStore, 6 Gb at MET Norway (/vol/fou)  

**Projects:**               NorClim/EarthClim and AeroCom

**Publications:**           [[http://www.geosci-model-dev.net/6/207/2013/gmd-6-207-2013.html|Kirkevåg et al. (2013)]], [[http://www.atmos-chem-phys.net/13/1853/2013/acp-13-1853-2013.html|Myhre et al. (2013)]], [[http://www.atmos-chem-phys.net/13/2423/2013/acp-13-2423-2013.html|Samset et al. (2013)]], [[http://www.atmos-chem-phys.net/14/2399/2014/acp-14-2399-2014.html|Jiao et al. (2014)]], [[http://www.atmos-chem-phys.net/14/10845/2014/acp-14-10845-2014.html|Tsigaridis et al. (2014)]], [[http://www.atmos-chem-phys.net/14/12465/2014/acp-14-12465-2014.html|Samset et al. (2014)]] 

**Papers in preparation:** Kipling et al. (in prep.), Koffi et al. (in prep).

**Simulation name(s):**      aerocomA2noresm_r128_X, where X = 2006 (AeroCom-A2.CTRL), 1850 (AeroCom-A2.PRE), ZERO (AeroCom-A2.ZERO), 2006preSO4, 2006preffBC, 2006preffOC and 2006prebbBCOC 
 
**Compset name used:**      NFAEROCOM1850 for X=1850, NFAEROCOM2006 for the other experiments

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

**Type of run:**            Initial

**Simulation period:**      5 years

**Spin-up period:**         2 years

**Initialisation:**

**Resolution:**             f19_g16 = 1.8x2.5

**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 for 1850, AeroCom Phase II for 2006, see references in Kirkevåg et al. (2013) 

**Greenhouse gases:**        Prescribed concentrations 

**Frequency for output:**    Monthly

**Active/changing forcing agents:**  Direct and indirect (1. & 2.) effects by anthropogenic SO4, POM and BC (for X = 2006 - 1850), or by all aerosols (2006 - ZERO, only direct effect), or by anthropogenic SO4 (2006 - 2006preSO4), ff BC (2006 - 2006preffBC), ff OC (2006 - 2006preffOC), or anthropogenic bb BC & OC (2006 - 2006prebbBCOC)  

**Special considerations:**

**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)