LASG, Institute of Atmospheric Physics,

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CLIVAR Working Group on Coupled Modeling (WGCM)
Meeting 22-24 Sep, 2008, Paris, France
LASG Climate system models and climate change
simulations

• LASG, Institute of Atmospheric Physics,
• Chinese Academy of Sciences

B. Wang, T. Zhou, Y. Yu, G.X. Wu, L. Li, Q. Bao
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Outline

• LASG/IAP models
• Contribution to the proposed experiments
• Suggestions to coordinated experiments
• Q A

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Family Tree of LASG/IAP Climate System model
4LOGCM 2L AGCM (1992)
20L OGCM 2L AGCM (1996)
20L OGCM R15L9 AGCM (1996)
GOALS (1997-2001)
FGOALS version 0-FGCM0(2002)
FGOALS (2003-)
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Climate Modeling Activities

• AMIP, 1992 , IAP L2 AGCM
• PILPS, 1995, IAP94
• CMIP, 1997, GOALS
• EMDI, 1999, AVIM
• IPCC
• AMIP2
• CMIP3 (20C3M)
• PMIP
• CLIVAR C20C
• CliPAS/APCC

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CAS International Partnership Creative Group
Climate System Model Development and Application
Studies
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Climate System Model FGOALS
atmosphere
ocean
0.250.25 0.50.5 1.01.0 OGCM Local zoom along
the equator
SAMIL (R42L26) GAMIL (12860,26L) GAMIL
(7240,26L) New versions (11)
coupler
land
Sea ice
CLM
CSIM
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LASG Regional Ocean-Atmosphere coupled model
CREM
OASIS
POM2000
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Potential Contributions to AR5 (Mandatory Exps)

• 1.1 Coupled model pre-industrial control run
• 1.2 Historical (20th century)
• 1.3 AMIP
• 2.1-2.2 two future-scenario prescribed
  concentration simulation
• 4.1 Idealized 1/year simulations
• 4.3a,b Prescribed SST expts. to diagnose fast
  response to abrupt 4XCO2
• 4.4 Diagnosis of climate system slow responses
  to abrupt quadrupling of CO2

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Potential Contributions to AR5 (Other Exps)

• 4.5 Gregory-style diagnosis of fast response to
  abrupt 4Xco2
• 5.1-5.2 Ensemble of historical and AMIP runs
• 6.1 20th century with only natural forcing
• 6.2-6.3 20th century runs forced by individual
  agents
• Decadal prediction Exps

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• New Coordinated Experiments?

• Regional Modeling
• CLIVAR C20C Pace-maker Exps

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The realism of coupled GCMs in catching the
present regional climate ?
Summer SAT trend (1950-1999) in 20C3M of CMIP
Zhou and Yu, 2006 J. Climate
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Changes of 850 hPa winds and rainfall in 20C3M
(1980-1999) (1951-1970)
GFDL-CM2.1
HadGEM1
HadCM3
CCSM3
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• Current state-of-the-art global models may not
  be able to project a credible regional
  distributions of future climate change.

• Should we coordinate any regional modeling
  experiments?

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Correlations between the observed and simulated
JJA rainfall

• We can compare AMIP results with the observation
• The 20C3M runs of fully coupled models are noisy
  in regional features

AMIP is correct here
After Wang et al (2006),ensemble of 5 AGCMs
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CLIVAR C20C Pace-maker Experiment
SST prescribed
(Revised based on Gabriel Lau)
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CLIVAR C20C Pace-maker Experiments
To fill in The Gap between AMIP and 20C3M
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Q A

• Will your group have an AOGCM, and ESM, or both?
• AOGCM ESM may not be ready in time.
• 2. Will your group perform the short-term
  decadal, long-term mitigation, or both?
• Both, but not ALL simulations
• 3. Will your new model have interactive aerosols
  or coupled chemistry?
• AGCM-Aerosol model two-way coupled.
• 4. When do you plan to begin your experiments?
• Early 2009 Last millennium run has begun.
• 5. Is the main constraint people, computer
  resources, or both?
• Computer resources

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List of IAP/LASG Climate Model
SAMIL Spectral Atmospheric Model of IAP
LASG GAMIL Grid-point Atmospheric Model
of IAP LASG LICOM LASG/IAP Climate Ocean
Model FGOALS Flexible Global Ocean-Atmosphere-Lan
d System Model FGOALS-s
FGOALS with SAMIL as the
atmospheric model FGOALS-g FGOALS with
GAMIL as the atmospheric model
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LASG is

• a research center of atmospheric sciences and
  geophysical fluid dynamics
• a talent training base for atmospheric scientists
  and oceanographers

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LASG is supported by

• Institute of Atmospheric Physics (IAP)

Chinese Academy of Sciences (CAS)
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Research Fields of LASG

Weather Climate Dynamics
Model Development Modeling

Geophysical Fluid Dynamics
Weather Climate Predictions