TRANSFERABILITY EXPERIMENTS FOR ADDRESSING CHALLENGES TO UNDERSTANDING GLOBAL WATER AND ENERGY BUDGE

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TRANSFERABILITY EXPERIMENTS FOR ADDRESSING
CHALLENGES TO UNDERSTANDING GLOBAL WATER AND
ENERGY BUDGETSEugene S. Takle, Raymond W.
Arritt, and William J. Gutowski, Jr.Iowa State
UniversityAmes, IA 50011 USA
ARCMIP
Initiation of TWG The 9th Annual
Meeting of the GEWEX Hydrometeorology Panel (GHP)
proposed organizing transferability experiments
to advance the science of regional climate
modeling by use of coordinated continental scale
observations and analyses. A Transferability
Working Group (TWG) has been proposed within GHP.
TWG operating strategy Develop a set of
hypotheses that will be tested through
applications of multiple regional climate models
on multiple domains by taking advantage of data
sets from coordinated major continental-scale
experiments.
GLIMPSE
BALTEX
BALTIMOS
BALTEX
GKSS/ICTS
PRUDENCE
RMIP
MAGS
SGMIP
QUIRCS
PIRCS
Percentage of domain in ocean vs. land may
influence predictability
Percentage of domain in ocean vs. land may
influence predictability
CAMP
GAPP
GAPP
Objective of the GHP Transferability Working
Group To understand the 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.
GAME
Model applications on multiple domains
promotes robust parameterizations
GAME
Access to many validation datasets reveals model
shortcomings
Regions of intense hydrological and energy
cycles (e.g., tropics) exposes model
shortcomings for simulating soil moisture
feedbacks.
LBA
LBA
IRI/ARC
AMMA
CATCH
MDB
LA PLATA
MDB

• Modeling Component
• What has been learned from past and current
  MIPs?
• What are the impediments and advantages for
  participation of non-native models
• and centers in international
  transferability experiments?
• Develop a set of modeling issues that will
  benefit from transferability experiments
• What do we mean by transferability?
• What are transferability criteria?
• What are the transferability accuracy
  expectations?
• What simulation processes challenge the
  transferability criteria?
• What environments challenge the
  transferability criteria?
• ? Develop consensus on a hierarchy of
  transferability numerical simulations.

• Observations Component
• Review what has been learned from past and
  current continental-scale
• experiments
• Review local unique features critical to
  accurate simulation of water and
• energy cycles
• Review variables, frequency, and metadata for
  datasets available or being
• collected
• ? Examine data accessibility issues and data
  format compatibility
• ? Review quality and differences of different
  reanalysis datasets
• Search for meta-comparisons that might be
  done by blending intercom-
• parisons from different continental-scale
  experiments.

Thanks to J. Roads, J.-H. Christensen, D. Paquin,
C. Jones for comments
For further information contact
gstakle_at_iastate.edu, rwarritt_at_bruce.agron.iastate.
edu, or gutowski_at_iastate.edu