Eugene S. Takle

1
Transferability Working GroupGEWEX
Hydrometeorology PanelWorld Climate Research
Programme

• Eugene S. Takle
• Project to Intercompare Regional Climate
  Simulations
• Iowa State University
• Ames, IA
• gstakle_at_iastate.edu

Regional-Scale Climate Modeling Workshop World
Climate Research Programme Lund Sweden 29 March
- 1 April 2004
2
Initiation

• At the Ninth Annual Meeting of the GEWEX
  Hydrometeorology Panel of the WCRP in September
  2003 interest emerged for conducting
  transferability experiments to advance the
  science of high-resolution climate modeling by
  taking advantage of contental-scale observations
  and analyses

3
Initiation (contd)

• Purpose is to add value to, not supplant, ongoing
  model/observations comparisons.
• PIRCS was tentatively suggested as a coordinating
  center for this activity, subject to approval of
  the modeling community

4
Transferability Working Group Mission

• To understand physical processes underpinning the
  global water and energy cycles and their
  predictability through systematic
  intercomparisons of regional climate simulations
  on several continents and comparison of these
  simulated climates with coordinated
  continental-scale observations and analyses

5
Types of Experiments

• Multiple models on multiple domains
• Not
• Single models on single domains
• Single models on multiple domains
• Multiple models on single domains

6
Organizing Meeting (?)

• Bring together modelers and managers of
  continental-scale observation programs
• Review status of measurements regarding water and
  energy cycles and their predictability on scales
  of days to interannual
• Review strengths and weaknesses of
  high-resolution climate modeling on specific
  domains and their abilities to function
  effectively on non-native domains.
• Design a set of transferability experiments that
  explores energy and water cycle components in
  widely different domains

7
Meeting (contd)

• Observations component
• Review what has been learned from past obs
• Review local unique features critical to EWC
• Review datasets available and being collected
• Examine data quality and differences of
  reanalysis data sets
• Search for meta-comparisons

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Meeting (contd)

• Modeling component
• What has been learned from past MIPs?
• Develop a set of modeling issues that will
  benefit from transferability experiments
• What do we mean by transferability?
• What are the transferability criteria?
• What are the transferability accuracy
  expectations?
• What simulation processes challenge the
  transferability criteria?
• Whate environments challenge the transferability
  criteria?
• Develop a set of transferability numerical
  simulations

9
Interest in a Transferability Working
GroupOrganizational Meeting?

• Date?
• Place?