Report of WGCM Met Office, Exeter, 35 Oct 2005 and WGCMWMP Met Office, Exeter, 5 Oct 2005 pm meeting

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Report of WGCM (Met Office, Exeter, 3-5 Oct
2005) and WGCM/WMP(Met Office, Exeter, 5 Oct
2005 (pm)) meetings

• Howard Cattle

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Key WGCM agenda issues

• Review of interactions with WCRP developments
  (JSC, COPES, WMP etc, CLIVAR, CliC, GEWEX)
• Progress with regional modelling
• IPCC/CMIP activities and key PCMDI role

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The IPCC AR4 motivated the formulation of the
largest international global coupled climate
model experiment and multi-model analysis effort
ever attempted. It is being coordinated by the
WGCM Climate Simulation Panel (started in
October, 2003) (Panel members Meehl, Covey,
Latif, McAvaney, Mitchell, Stouffer) Fourteen
modeling groups from around the world are
participating with 21 models considerable
resources have been devoted to this project
PCMDI has archived gt27 TeraBytes of model data so
far
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Results from analyses of the multi-model dataset
were presented by 125 scientists at a workshop
convened by US CLIVAR and hosted by IPRC (Univ.
of Hawaii) March 1-4, 2005, and are feeding
directly into the AR4 assessment process
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Over 200 papers have been submitted to
peer-reviewed journals with results from
multi-model analyses for assessment in the IPCC
AR4 This is more than triple our most optimistic
estimate for participation To date, there are
over 400 analysis projects registered at PCMDI
more are being added every week This is the
largest, most comprehensive, highest profile and,
arguably, most successful project ever organized
by WGCM
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Key WGCM agenda issues (2)

• Scenarios for IPCC AR5 and WGCM influence
• Reports from modelling groups
• Data management issues (Promote approach used for
  AR4, including CF conventions for metadata.)
• The next CMIP activity (20th century forcing
  experiments for detection/attribution,
  anthropogenic vs. natural?, proposed by David
  Karoly)
• Other WGCM activities (CFMIP, forcing scenarios,
  model initialisation (short review of current
  options), climate change detection, paleo
  modelling (PMIP))
• Links to Earth System Modelling (Carbon cycle,
  ESSP/Global Carbon Project, C4MIP, biosphere
  modelling)
• Interactions with THORPEX

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Joint session with WMP (WCRP Modelling Panel)

• Long discussion on concept of seamless
  prediction (a key element of COPES)
• Reviews of modelling activities from WGNE
  GEWEXModelling Panel CLIVAR WGCM,WGSIP,WGOMD
  CliC, COPES TFSP
• Monsoon Modelling activities
• WCRP Observations and Assimilation Panel (WOAP)
• AMIP

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WGCM/WMP meeting - WGOMD

• Presentation covered P-OMIP and WGOMD -Workshop
  Evaluating the ocean component of IPCC-class
  models, leading to concept of CORES.
• Outline of CORES (including mean, interannually
  varying and freshwater perturbation experiments)
• Joint WGOMD/CLIVAR Atlantic workshop on Atlantic
  Thermohaline variability
• Question for WGOMD - how compatible are the WGOMD
  freshwater perturbation experiments to the CMIP
  water hosing experiments?
• Discussion of model resolutions required for
  climate experiments

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