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Ecology in Action
7/23/2019 Cub Rooftop Lesson01 Presentation v5 Tedl Dwc
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Reduce the “urbanheat island efect”
Reduce amount ogreenhouse gas
Provide more spaceor agriculture
Reduce and cleanstorm water runof
Reduce energyconsumption
Increase the beautyo cities
7/23/2019 Cub Rooftop Lesson01 Presentation v5 Tedl Dwc
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A phenomenon in which the ambient air temperature in
cities is higher than in its surrounding suburban andrural areas
Causes:
Materials (such as concrete and asphalt) absorb andradiate more heat than natural surfaces found in ruralsettings
Tall buildings - more surfaces that reect and absorb lightand bloc wind
!aste heat from energy usage " includes cars# airconditioning# industries
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Transer o heat by direct contact oparticles in matter
In solids, close vibration o atomsnext to each other
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Transer o heat by uid or gas movingacross a boundary
!atural convection occurs bybuoyancy orces
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Transer o thermal energy through space This is how the sun heats the surace o the
"arth#
Radiation can be transmitted, reected and
emitted rom a surace
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Insulators$ materials that reduce the rate o heattranser
%bsorbers
$ materials that ta&e up the energy o light Reectors
$ materials that change the direction o lightwaves
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%ll colors absorb light andreect only thewavelengthso their color
'hite reects allwavelengths o light
(lac& absorbs allwavelengths o light
The energy o the absorbed light istranserred into heat energy)
(lac& suraces get hotter than other
colors#
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Provide an alternative to commonroo materials
%bsorb *+, and sunlight during
photosynthesis *reate shade
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Photosynthesis- how plants eed themselves +ccurs in the leaves o plants
Represented by the e.uation-
/ses carbon dioxide and energy rom the sun
Produces oxygen
%dditional bene0t- Photosynthesis helpsreduce global warming by convertingcarbon dioxide molecules 1a greenhousegas2
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*ondition o the roo
3tructural capacity o the roo
%ccess to the roo
*ost
Irrigation
4rainage
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This demonstration plot on a sidewal&in Portland, +R, shows the exactcomposition o the “green roo” on the
building above it5
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6easure the temperaturesinside and on the roo o the
buildings while under a heatlamp 1sun2
7raph the data
Team ob8ectives- *onstruct two identical
model buildings %ne with a blac tar
roof %ne with a rooftop
garden
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http-99www5explorechicago5org9city9en9about:the:city9green:chicago97reen:Roos:5html
http-99www5explorechicago5org9city9en9things:see:do9attractions9tourism9pepsico:rootop:garden5html
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Peter =alasChttp-99commons5wi&imedia5org9wi&i9;ile-+bli.ue:rays:>:Pengo5svg
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7/23/2019 Cub Rooftop Lesson01 Presentation v5 Tedl Dwc
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*arleigh 3amson, ITD Program, *ollege o "ngineering and %ppliedscience
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