Presentation Jonker - Clouds and Computing
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Transcript of Presentation Jonker - Clouds and Computing
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Challenge the future
DelftUniversity ofTechnology
Clouds and ComputingHarm Jonker
Department GeoScience and Remote Sensing
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Clouds in Weather and Climate
• Hydrological cycle
• Radiation balance
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Landsat 65km LES 10km
~mm ~100m~1µm-100µm
Earth 107 m
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Landsat 5 satellite picture65km; resolution 30m
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~ 100km LES 10km
~mm ~100m~1µm-100µm
Earth 107 m
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~ 100km LES 10km
~mm ~100m~1µm-100µm
Earth 107 m
DALES: Dutch Atmospheric Large Eddy SimulationTUD, KNMI, WUR, IMAU, ...
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Local workflow!
Editing simulation
settings
Interaction
while simulating!
High-Performance Simulations of Turbulent Clouds on a Desktop PC:Exploiting the GPU
Schalkwijk, Griffith, Post & Jonker
March 2012
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GCM-scale
cloud-scale
large scale forcings. parameterised-warmer sea,-subsidence
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GCM-scale
cloud-scale
cloud response
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Schalkwijk, Jonker, Siebesma, JAS 2013 (under review)
subsidence:(large scale circulation)
Cloud Response (in these particular settings)
EUCLIPSE project
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subsidence:(large scale circulation)
Schalkwijk, Jonker, Siebesma, JAS 2013 (under review)
Cloud Response (in these particular settings)
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GCM-scale
cloud-scale
large scale forcings. idealized
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The KNMI TestbedEmbedded in a
Large-Scale Weather model
GALES
icw Neggers, Siebesma, v. Meijgaard
Cabauw
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The KNMI TestbedPreliminary comparison with observations
0 12 24
Cloudcover
Average diurnal cycle over 22 ‘cumulus days’
Hour of day
30%
20%
10%
0%
Promising results for
cumulus days….
Observations
Simulated observations
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Increasing the problem sizeMulti-GPU simulations
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Satellite image
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256 coupled GPUs (130 000 CUDA cores), 400x400x12km (40962x190 grid boxes)
GALES: MULTI-GPU PRACE: CURIE
courtesy: Jerome Schalkwijk
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HD(CP)2: High Definition Clouds and Precipitationfor Climate Prediction
16 German institutes, 50 pd/PhDs
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0.25 1 4 16 64 256 1024 4096 16384 655360.25
1
4
16
64
256
1024
4096
16384
65536
#GPUs
"spe
edup
"
Weak scaling properties
Oak Ridge5000x5000km
Curie409x409km
Curie204x204km
Perfect ScalingCURIEOak Ridge?
Dream on …. (we have the technology)
What if we just had the facilities …
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Combine with Radiation calculations
courtesy Johan vd Dussen, Jerome Schalkwijk
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Sustainable Energy Prediction and Management Tool
courtesy Stephan de Roode
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accurate observations (remote sensing)e.g. Russchenberg et al.
e.g. Hanssen et al.
humidity fields from InSAR(100kmx100km)
High resolution Data Assimilation
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Schalkwijk et al, BAMS 2012. Boing et al. JAS 2012
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geo-engineering