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======  N20TRAERCNOCBPRP_EXPECT01   ======

===== Model-run description for historical run used in EXPECT =====

**Purpose of simulation:**  Historical run for expect model version

**Contact person:**         Jerry Tjiputra <jerry.tjiputra@uni.no> 

**Data owner:    **         Jerry Tjiputra <jerry.tjiputra@uni.no>     

**Revision Number:**        249, https://svn.met.no/NorESM/noresm/branches/projectEXPECT_cmip5-r143-1

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

**Production date:**        Spring 2014

**Ensemble runs:**          No 

**Storage locations:**      NorStore (/projects/NS2345K/noresm/cases/N20TRAERCNOCBPRP_EXPECT01 ) 

**Storage space:**          ??

**Projects:**               EXPECT

**Publications:**            

**Papers in preparation:**  

**Simulation name(s):**     N20TRAERCNOCBPRP_EXPECT01 
 
**Compset name used:**      N20TRAERCNOCBPRP

**Model type:**             Fully coupled

**Type of run:**            Hybrid

**Simulation period:**      1850-2005

**Initialisation **         Started as hybrid run from N1850BPRPCNOC_f19_g16_spin_02 with restart files from "0501-01-01". This date maps to 1850-01-01 in this run.

**Resolution:**             f19_g16= 1.9x2.5 degree atmosphere/land. Dipolar ocean/ice grid, ~ 1 degree

**Emission year(s):**       1850-2005

**Greenhouse gases:**       Interactive CO2

**Emission inventories**    N/A   

**Frequency for output:**   Monthly and selected daily 

**Active/changing forcing agents:**  Greenhouse gases: Direct and indirect (1. & 2.) effects of SO4, POM and BC. 

** Special considerations: **   Note that the number of cores used for historical runs was changed in revision 249. Earlier historical runs were too slow. A "bug" in was fixed. Do svn diff -r 249:246 to see the changes in noresm/scripts/ccsm_utils/Machines/config_pes.xml. Earlier version will not give bit identical results to this run even using same compset.  



**Tuning parameters which are changed relative to the host model NorESM-CMIP5-branch:** 

  * rhminl:  0.9005      lower RH threshold for formation of low stratiform clouds (0.91 in CAM4)