presentation jonker - clouds and computing
DESCRIPTION
10/04/2013 TU Delft Climate Institute Symposium: Do clouds change in a warming climate?TRANSCRIPT
Challenge the future
DelftUniversity ofTechnology
Clouds and ComputingHarm Jonker
Department GeoScience and Remote Sensing
Clouds in Weather and Climate
• Hydrological cycle
• Radiation balance
Landsat 65km LES 10km
~mm ~100m~1µm-100µm
Earth 107 m
Landsat 5 satellite picture65km; resolution 30m
~ 100km LES 10km
~mm ~100m~1µm-100µm
Earth 107 m
~ 100km LES 10km
~mm ~100m~1µm-100µm
Earth 107 m
DALES: Dutch Atmospheric Large Eddy SimulationTUD, KNMI, WUR, IMAU, ...
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
GCM-scale
cloud-scale
large scale forcings. parameterised-warmer sea,-subsidence
GCM-scale
cloud-scale
cloud response
Schalkwijk, Jonker, Siebesma, JAS 2013 (under review)
subsidence:(large scale circulation)
Cloud Response (in these particular settings)
EUCLIPSE project
subsidence:(large scale circulation)
Schalkwijk, Jonker, Siebesma, JAS 2013 (under review)
Cloud Response (in these particular settings)
GCM-scale
cloud-scale
large scale forcings. idealized
The KNMI TestbedEmbedded in a
Large-Scale Weather model
GALES
icw Neggers, Siebesma, v. Meijgaard
Cabauw
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
Increasing the problem sizeMulti-GPU simulations
Satellite image
256 coupled GPUs (130 000 CUDA cores), 400x400x12km (40962x190 grid boxes)
GALES: MULTI-GPU PRACE: CURIE
courtesy: Jerome Schalkwijk
HD(CP)2: High Definition Clouds and Precipitationfor Climate Prediction
16 German institutes, 50 pd/PhDs
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 …
Combine with Radiation calculations
courtesy Johan vd Dussen, Jerome Schalkwijk
Sustainable Energy Prediction and Management Tool
courtesy Stephan de Roode
accurate observations (remote sensing)e.g. Russchenberg et al.
e.g. Hanssen et al.
humidity fields from InSAR(100kmx100km)
High resolution Data Assimilation
Schalkwijk et al, BAMS 2012. Boing et al. JAS 2012
geo-engineering