Contemporary Climate Change 
6.9.2.2. Cloud Feedback
Cloud feedback is the term used to encompass effects of changes in cloud and their associated radiative properties on a change of climate, and has been identified as a major source of uncertainty in climate models (Cubasch & Cess, 1990). This feedback mechanism incorporates both changes in cloud distribution (both horizontal and vertical) and changes in cloud radiative properties (cloud optical depth and cloud droplet distribution) (Wigley, 1989; Charlson et al., 1987); these are not mutually independent. Although clouds contribute to the greenhouse warming of the climate system by absorbing more outgoing infrared radiation (positive feedback), they also produce a cooling through the reflection and reduction in absorption of solar radiation (negative feedback) (Cubasch & Cess, 1990). It is generally assumed that low clouds become more reflective as temperatures increase, thereby introducing a negative feedback, whilst the feedback from high clouds depends upon their height and coverage and could be of either sign (Gates et al., 1992).
Greenhouse Gases
-Carbon Dioxide
·Sources
·Sinks
·Carbon Cycle
·Concentrations
·Equilibrium
-Methane
·Sources
·Sinks
·Concentrations
-Nitrous Oxide
·Sources
·Sinks
·Concentrations
-Halocarbons
·Sources
·Sinks
·Concentrations
-Ozone
-Other Gases
-Lifetimes
-Summary
Greenhouse Forcing
-Forcing Factors
-GWPs
-ΔF-ΔC
-1765 to 1990
-Ozone
Aerosols
-Sources & Sinks
-Forcing
·Direct
·Indirect
-Total Forcing
Climate Variations
-Surface Temp.
-Precipitation
-Other
·Stratosphere
·Cryosphere
·Atmos. Circulation
·Cloudiness
Detection
-Modelling
-Attribution
·Latitudes.
·Stratosphere
·Precipitation
·Sea Level
·Fingerprints
-When?
Future Climate
-GCM Simulations
-Feedbacks
·Water Vapour
·Clouds
·Ice Albedo
·G-house Gases
-21st Century
Impacts
-Agriculture
-Forestry
-Ecosystems
-Water Resources
-Oceans/Coasts
-Human & Health
Responses
-Stabilising
-FCCC
-Kyoto Protocol
-UK Programme
·Energy Demand
·Energy Supply
-Evaluation