Transcript Regional Arctic Climate System Model (RACM) – Project Overview

ARSC & IARC Report
DOD/RACM Workshop, Jun 16-17 2009
Juanxiong He1,2
Greg Newby1
1. Arctic Region Supercomputing Center, 2. International Arctic Research Center
Outline
• Summary of the works since last
December
• Next step
Summary of the works since last December
• Merge ESMF of WRF and ESMF of CCSM4
• Global WRF active coupling with POP2, CICE,
CLM
• Regional WRF coupling with data model
• Regional WRF coupling with POP2, CICE and
sland model
• Code for hybrid coupling
ccsm4_0_racm02
Merge ESMF of WRF and ESMF of CCSM4
• Previous
method:
Rename
each
module/subroutine of ESMF of WRF and
ESMF
subroutines
called
by
seq_ccsm_drv.F90
• Resolve the differences of both EMSF. Add
some subroutines and structures into the
ESMF of CCSM4 to simulate the functions of
the ESMF of WRF.
Global WRF full active coupling with POP2,
CICE, CLM
• Setting
Global WRF 120x60, POP and CICE 100x116
CLM 46x72
start at 2001-01-01_00:00:00
• Status
Run as long as three months and crashes at
the fourth month
Sea level Pressure (January)
Observation
Coupling
WRF
alone
Sea level Pressure (February)
Observation
Coupling
WRF
alone
Sea level Pressure (March)
Observation
Coupling
WRF
alone
Result
• Coupling WRF works fine.
• The performance of WRF in the full coupling
relates to the single WRF strongly.
• In this simulation, the coupling and the single
run aren’t very good in Northern high
latitude.
Regional WRF coupling with data model
• Setting:
wr50a_wr50a (276x206, time step =2min)
WRF, DLND, DOCN, DICE
start at 2001-01-01_00:00:00
• Status: 6 days at least, fine, maybe as long as
we wish
Regional WRF coupling with data model
Atmosphere domain
Regional WRF coupling with data model
Surface temperature at
2001-01-06_00:00:00
Sea level pressure at
2001-01-06_00:00:00
Regional WRF coupling with POP2, CICE
and sland model
• Setting:
wr50a_ar9v2 (276x206_1380x1080)
WRF, SLND, POP2, CICE
start at 2001-01-01_00:00:00
• Status: crash after 6 hours integration
Regional WRF coupling with POP2, CICE
and sland model
Ocean domain
Regional WRF coupling with POP2, CICE
and sland model
ar9v2
ar9v1
Sea surface temperature at 2001-01-01_06:00:00
Regional WRF coupling with POP2, CICE
and sland model
Air temperature at the
bottom level at 200101-01_06:00:00
Sea level pressure at
2001-01-01_06:00:00
Regional WRF coupling with POP2, CICE
and sland model
Tony has regenerated
the remapping file
WRF domain need
be verified further
surface temperature from coupler at 2001-01-01_06:00:00
Benchmark and resource
• Benchmark(wr50a_ar9v2)
CPL=64, WRF=25,SLND=25,CICE=64
POP2=64,SGLC=1
wall time: 3min / simulation time: 1hr
• Resource
32 CPU may be the minimum to run
wr50a_ar9v2. Tony suggested 64 CPU and
more are better to run wr50a_ar9v2 .
Code for hybrid coupling
Real coupling region
WRF surface scheme or data model
Code for hybrid coupling
• New option
Config_flags%hybrid_coupling
• New code
module_phy_init.F,
module_first_rk_step_part1.F
start_em.F
• Revise Code
Config_flags%hybrid_coupling
Module_hybrid_driver.F, Module_hybrid_sfclay.F
Module_hybrid_sfcdiags.F, Module_hybrid_noahdrv.F
Module_hybrid_slab.F
Next Step
• WRF, VIC, POP2 and CICE full coupling
• Improve the simulation and performance
Thank you!