Tropical Biases Workshop Agenda
Day 1 (Wed 28 May), Topics/Issues:
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What do we know about biases in the current climate models?
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How similar are biases seen in these models?
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What strategies/parameterization improvements have proved effective in improving tropical climate over the oceans in these models (i.e. history of model biases in individual models)?
SESSION 1: NCAR and GFDL Models (Session Chair: P. Chang): Comprehensive presentation of tropical over-ocean
biases on seasonal and longer timescales in AGCM, OGCM and CGCM model in NCAR and GFDL models.
SESSION 2: Global Model I (Session Chair: Leo Donner): Tropical biases in other global models.
SESSION 3: Global models II (session Chair: Paul Schopf): Presentations based on other models or interesting sensitivity
studies. Emphasis on what makes a difference in the distribution of tropical convection and near-equatorial SST.
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1345-1403: INGV Coupled Model, A. Navarra
- 1403-1421: Tropical performance of the
CCSR Coupled GCM, M.Kimoto
- 1421-1439: The coupled General Circulation Modeling Activity at CVRP/FRSGC
in collaboration with the Earth Simulation Center, Swadhin Behera, Sebastien
Masson, Jingjia Luo and Toshio Yamagata
- 1439-1457: Sensitivity of the tropical precipitation distribution in the
NSIPP AGCM, J. Bacmeister and M. Suarez
- 1457-1515: Tropical Biases in the COLA Coupled Model, B. Kirtman and
E. Schneider
- 1515-1533: Why are coupled GCMs in such a hurry? Exploring the factors
leading to the short period of interannual variability in the tropical Pacific
region of coupled GCMs, D. Dewitt
- 1533-1551: Coupled modeling activity at IPRC and monsoonal impacts on Pacific
cold tongue climate, Bin Wang, Tim Li and Xiouhua Fu
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1551-1610: Break
GROUP DISCUSSION: Which processes make the biggest difference and how do we
diagnose how well we are doing?
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1610-1740: AGCM Discussion (Chairperson: Leo Donner) Topics include: deep convection, boundary layer/shallow convection, cloud/radiation interaction, surface turbulent fluxes, land/convection interactions,horizontal, vertical, temporal resolution.
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1610-1740: OGCM Discussion (Chairperson: Paul Schopf ) Topics include: surface energy/salinity
budgets, distribution of wind stress and upwelling, vertical mixing processes, penetration of solar radiation, diurnal cycle, horizontal, vertical resolution.
RECEPTION: cash bar and hors d'oeuvres reception will be held in the Holiday Inn.
Day 2 (Thur 29 May), Topics/Issues::
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How important is observational uncertainty in creating current biases or process errors?
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Are particular process studies called for?
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What new long-term observations (e.g. ARGO, enhanced TAO) would have maximal impact?
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To what extent do mean and seasonal biases impact our ability to forecast ENSO and ENSO related variability on SI timescales with CGCMs?
GROUP REPORT: General discussion of which processes control tropical ocean biases in coupled models.
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0845-0900: AGCMs, Leo Donner
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0900-0915: OGCMs, Paul Schopf
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0915-0925: General Discussion
SESSION 1: Using observations and small-scale models to reduce biases (Session Chair: Paul Schopf):
- 0925-0942: Biases in surface heat flux products diagnosed from in situ
flux measurements, Lisan Yu
- 0942-1002: Exploration of the causes of CCSM-2 Pacific biases, Peter
Gent, Grokhan Danabasoglu, William Large
- 1002-1022: Boundary condition override experiments with the GFDL coupled
model, Tony Rosati
- 1022-1040: Lateral mixing schemes in OGCMs: a new parameterization to solve
the cold tongue bias, Kelvin Richards
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1040-1055: Break
- 1055-1123: Lessons learned from EPIC2001 about the east Pacific ITCZ, David
Raymond
- 1123-1141: Simulation of marine stratocumulus, C. Roberto Mechoso
- 1141-1159: Simulating eastern Pacific climate with regional atmospheric/coupled
models, Shang-Ping Xie
- 1159-1217: MJO-like coherent structures in aquaplanet simulations with
Emanuel's convective parameterization and with super-parameterization, Wojciech
Grabowski
- 1217-1235: Mean state biases, intra-seasonal and diurnal variability in
500-day T42 global simulations using a super-parameterization of clouds, Marat
Khairoutdinov
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1235-1405: Lunch
SESSION 2: Biases in Pacific ENSO/Tropical Atlantic (Session Chair: Jeff Kiehl):
DISCUSSION:
(1) How important is observational uncertainty in creating current
biases or process errors? Are particular process studies called for? What new long-term observations (e.g. ARGO, enhanced TAO) would have maximal impact?
(2) To what extent do mean and seasonal biases impact our ability to model ENSO and related variability and to forecast them with CGCMs?
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1610-1740: General Discussion (Chairperson: Jeff Kiehl) Topic includes: Hypothesis,
New observations needed, ..., etc.
Day 3 (Fri 30 May), Topics/Issues:
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What have we learned from idealized or reduced
physics models about tropical biases in real models?
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Are there promising avenues to pursue in the future?
SESSION 1: Role of idealized models in understanding C/A/OGCM
dynamics and of new diagnostics (Session Chair: Max Suarez):
- 0845-0903: Moisture-convection feedback in the tropics, Wojciech W.
Grabowski
- 0903-0921: Some very simple tropical models,
and the bulk parameters that control their behavior, Adam Sobel
- 0921-0939: Validating and understanding feedbacks in climate models: Results
for the Pacific cold-tongue region, Dezheng
- 0939-0957: Boundary-layer dynamics and cross-equatorial Hadley circulation,
Olivar Pauluis
- 0957-1015: Energy Disipation rates in the tropical ocean, Alexey Fedorov
- 1015-1030: Sensitivity of the equatorial Pacific to mid-Lat processes using
an ocean GCM and its adjoint, Eli Galanti
- 1030-1045: Effect of biological feedbacks on the mean state, Hezi Gildor
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1045-1100: Break
DISCUSSION: What have we learned from idealized models about tropical biases in real models? Are there promising avenues to pursue in future?
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1100-1230: General Discussion (Chairperson: Max Suarez) Topics include: New diagnostics, Climate Process Experiments, Organized plan or recommendations for
CLIVAR activities to follow,...,etc.