1 March 2012

Challenge the future

DelftUniversity ofTechnology

Clouds and Climate

Harm Jonker

Watch the simulation on YouTube: http://youtu.be/1JpOKO6lrtE

Jerome Schalkwijk, TNW EWI: Eric Griffith, Frits Post

Watch the simulation on YouTube: http://youtu.be/mIUNRjBLIyQ

EWI: Gerwin de Haan

Jerome Schalkwijk, TNW EWI: Gerwin de Haan

Webcam CabauwMeteo site KNMI

3D Simulation on a GPU

Pier Siebesma, Roel Neggers, Jerome Schalkwijk

Pier Siebesma, Roel Neggers, Jerome Schalkwijk

KNMIDelft University of Technology

Wageningen University and ResearchUtrecht University

RIVMECN

TNO European Space Agency

CESAR Consortium

Groeten uit Cabauw

Herman Russchenberg

Cesar Observatory

A look inside the cloudsAtmospheric properties: gases, aerosols

clouds, rain, wind, thermo-dynamics, radiation

lidar radar

time

heig

ht

short wavelength long wavelength

Many small water drops

Ice crystals

Herman Russchenberg, Yann Dufournet

Cloud water and its shadowDistribution of water in the cloud

[g/m^3]

Amount of sunlight at the surface [W/m^2]

Courtesy of Christine Brandau, Simone Placidi, Dave Donovan, Wouter Knap

Clouds and Climate

• Hydrological cycle

• Radiation balance

Dufresne & Bony, Journal of Climate 2008

IPCC, 2007

Misty Factors in the Climate …

2x CO2 scenario

Dufresne & Bony, Journal of Climate 2008

Radiative effects only

Water vapor feedback

Surface albedo feedback

Cloud feedback

IPCC, 2007

2x CO2 scenario

Misty Factors in the Climate …

Landsat 65km

LES 10km

~mm ~100m~1mm-100mm

Earth 107 m

~ 100km LES 10km

~mm ~100m~1mm-100mm

Earth 107 m

LES 10km

~mm ~100m~1mm-100mm

Earth 107 m ~ 100km

EU-FP7 project Euclipse (Pier Siebesma et al)

Ship tracks

Effects of Aerosol Particles on Climate

• Development of experimental systems/instruments for high time-resolution

• Counting sub-5 nm Particles

• Measuring Particle Size and Shape

• Determining Particle Hygroscopicity

• Laboratory and Field Measurements• Understanding nucleation

• Determining the direct and indirect effect of aerosols on climate

TNW: George Biskos, A. Schmidt-Ott

Laboratory and Field Measurements of Aerosol Hygroscopicity

Hygroscopic growth of laboratory-generated 10-nm Ammonum Sulfate as a function of Relative Humidity (RH)

Airborne measurements of the hygroscopic growth of particles observed over the Aegean Sea

TNW: George Biskos, A. Schmidt-Ott

FINEDUSTREDUCTION.COM

0 . 7

6

m

Positief geladen schermen electrode

• 24 frames (6m lengte)• 4 frames (variant van de lengte)

Receptor geaarde schermen

- 24 frames over 900 m6

m

16 m

Thomassentunnel:

TNW/Botanical garden: Bob Ursem

Chicken Farm Application

TNW/Botanical garden: Bob Ursem

TNW/Botanical garden: Bob Ursem

extreme weather

city climate

geo-engineering

cloud-climate feedback