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Urban Climates How does human activity affect climate?

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Presentation on theme: "Urban Climates How does human activity affect climate?"— Presentation transcript:

1 Urban Climates How does human activity affect climate?

2 The Effects of the Urban Climate in the U.K. WHY?

3 Urban Heat Island London night – May Why best at night? In high pressure? Where highest? Where lowest? Range? Draw a cross-section

4 Urban heat Island cross-section – USA City

5 Albedos Nearer to 1 = more energy reflected Car engines / exhausts Buildings with central heating Impact of parks? when greatest?

6 Urban Rainfall Suns energy absorbed by buildings Decreased air pressure Increased air pressure Cumulus cloud where rising warm air meets colder air Convectional rain More dust particles for condensation nuclei

7 Urban Winds Wind is funnelled by tall buildings Prevailing wind Gusty winds may be two or three times stronger than average canyon effect of tall buildings

8 Future Trends – different cities What are the advantages and disadvantages of the urban microclimate for a city dweller? What trends can we see for all cities?


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