CTB3300WCx WCC1 slides

WCC 1: Introduction to climate change CTB3300WCx: Introduction to Water and Climate Prof.dr.ir. Herman Russchenberg

Module contents  Evidence of global warming  Principle of the greenhouse effect  Sea level rise and ice cover  Clouds and precipitation  Future weather

The globally mean temperature

Climate What is climate?  Long term averaged weather (30 years)

What is climate change?  Changes of long term averaged weather (30 years)

What is anthropogenic climate change?  Man‐induced changes of long term averaged weather (30 years)

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Marine air temperature: 2 datasets

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Observed change in annual precipitation over land

Source IPCC Working  Group I

Radiation

Atmosphere

Solar light

Infrared radia;on

CO2  observation  CO2  concentration in the  atmosphere has increased

Temperature

About predictions Is it really that simple? observations predictions

Greenhouse gas

 No, we have to understand the physical processes in the climate system

Incoming Shortwave R ad iation (SWR}

Natural Fluctuations in Solar Output

SWR Reflected by the Atmosphere

Outgoing Longwave Radiation (OLR}

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SWR Absorbed by the Atmosphere

Clouds

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Surface Albedo Changes SWR

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Ozone

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Greenhouse Gases and Large Aerosols

Solar energy height Too cold to live in

Too warm to live in

Nice in the shade

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No atmosphere

Greenhouse gases

Cooling clouds

Sea level

Image by HJSP82 CC BY SA

Antarctic ice sheets

Image CC BY‐NC

Clouds and precipitat i o n

WCC 1: Introduction to climate change CTB3300WCx: Introduction to Water and Climate Prof.dr.ir. Herman Russchenberg