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Prof.dr.ir. Herman Russchenberg
WCC 4: Clouds and climate change
CTB3300WCx: Introduc2on to Water and Climate
Release of latent heat
Cloud forming
Condensa2on level
Height
A
B
C
Parcel with air and water vapour
Clustering
H2O
Cluster of water molecules
Water molecule Cannot enter the cluster
H2O H2O
H2O
H2O H2O H2O
H2O
H2O
Aerosols
Aerosol
H2O H2O
H2O
H2O
H2O
H2O
A bit more on cloud forma;on
No aerosols A few aerosols Many aerosols
Clouds
Condensa8on level
Moist air parcels
Aerosol-‐cloud interac;ons
More aerosols ! Delayed rainfall ! Longer cloud life8me
! Sustained impact on radia8on
Global warming: state of the art
Response of the earth
Addi2o
nal w
arming
Direct warming due to CO2
Radia5ve effects
Water vapor feedback
Surface albedo feedback
Cloud feedback
Global warming, cloud response
How to solve this problem?
Models Observa2ons
Prof.dr.ir. Herman Russchenberg
WCC 4: Clouds and climate change
CTB3300WCx: Introduc2on to Water and Climate