Heat island phenomenon
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Transcript of Heat island phenomenon
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Heat Island Heat Island PhenomenonPhenomenon
Takatoshi AKAI
23-1JOCV
Malindi Marine National Park
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TOPICSWhat is Heat Island Phenomenon (H.I.P.)Cause of H.I.P.H.I.P. and the City Type DisasterHow to cool down our city.Case Study: in JapanConclusion
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What is Heat Island Phenomenon (H.I.P.)
• Last 100 years, average temperature on the earth raised 0.74 .℃
• In the temperature chart, urban areas looks like island.
• In Japan, within last 100 years,
temperature raised
3 in Tokyo, ℃2.6 in Nagoya, ℃2.3 in Sapporo.℃
Tokyo↑3℃
Nagoya↑2.6℃
Sapporo↑2.3℃
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Looks like an island!!
• Compare the temperature in Tokyo between 1981 and 1999.
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Cause of Heat Island Phenomenon ① Green land ↓ and heat stays on the ground. ↑ ② asphalt and concrete, so heat does not go out. ③ Human activities, such as cars, air conditioner,
electric machines emit heat. Heat Island
↑Air Conditioning
↓Green land and water↑asphalt and concrete↓Heat reflection
↑Heat emit by human act
↓evaporation
↑land temp.
↑reflection heat
Building heat up
Heat from factory
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H.I.P. and the City Type Disaster 1
• Hay fever (especially on September)
⇒ Pollen spread when warm enough.
⇒ Difficult to absorb pollen in asphalt.
⇒ 60 % of Japanese got hay fever. (mimi pia)
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H.I.P. and the City Type Disaster 2
• Flood
⇒ Heavy rain by global warming.
⇒ Rain go into subway and underground shopping arcade.
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How to cool down our city?
• Green roof, Green wall, Green curtain, and Box Gardening
• Adjust temperature of air-conditioner
• Cool Biz, Warm Biz
• Spread water (Uchi-mizu: Hit water)
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Case Study in Japan: Green Roof (Okujo Ryokuka:屋上緑化 )
• Cool down temperature.
• Stress free and get more customer.
• Able to get subvention from government.
• Cultivation and garbage compost at green roof.
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Conclusion
• Heat Island phenomenon is negative heritage of our development.
• H.I.P. will be cause some disaster.
• To stop H.I.P., we can practice one by one, and its not so difficult.