Urban Heat Island Effect: Difference between revisions
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==Investigation== | ==Investigation== | ||
Powerpoint | |||
*[https://weather.ap.polyu.edu.hk/secure/education/urban_heat_island_effect/Urban_Heat_Island_Effect_Eng_v5.ppt Urban Heat Island Effect] (Contributed by Matthew Wong of the Department of Applied Physics, The Hong Kong Polytechnic University) | *[https://weather.ap.polyu.edu.hk/secure/education/urban_heat_island_effect/Urban_Heat_Island_Effect_Eng_v5.ppt Urban Heat Island Effect] (Contributed by Matthew Wong of the Department of Applied Physics, The Hong Kong Polytechnic University) | ||
*[https://weather.ap.polyu.edu.hk/secure/education/urban_heat_island_effect/Weather_and_Our_Environment_Eng_v2.ppt Weather and Our Environment] (Contributed by Matthew Wong of the Department of Applied Physics, The Hong Kong Polytechnic University) | *[https://weather.ap.polyu.edu.hk/secure/education/urban_heat_island_effect/Weather_and_Our_Environment_Eng_v2.ppt Weather and Our Environment] (Contributed by Matthew Wong of the Department of Applied Physics, The Hong Kong Polytechnic University) | ||
*[ | |||
Worksheet | |||
*[[Media:Micro_Urban_Heat_Island_Effect_Worksheet_Eng_v6(CC).doc|Micro Urban Heat Island Effect]] (Worksheet) [[File:Cclogo.jpg]](Contributed by Matthew Wong of the Department of Applied Physics, The Hong Kong Polytechnic University)[[Image:NEW.gif]] | |||
*[[Media:Micro_Urban_Heat_Island_Effect_Worksheet_Chi_v6(CC).doc|城市微熱島效應]] (Worksheet) [[File:Cclogo.jpg]] (撰稿人：香港理工大學應用物理學系黃文翰)[[Image:NEW.gif]] | |||
*[https://weather.ap.polyu.edu.hk/secure/education/urban_heat_island_effect/F1_climatic_change_project_handbook_09_10_teachers_edition.doc F.1 climatic change project handbook 09-10 teachers edition] (contributed by Mr Vincent Lee of Tak Sun Secondary School) | *[https://weather.ap.polyu.edu.hk/secure/education/urban_heat_island_effect/F1_climatic_change_project_handbook_09_10_teachers_edition.doc F.1 climatic change project handbook 09-10 teachers edition] (contributed by Mr Vincent Lee of Tak Sun Secondary School) | ||
*[ | *[[Media:Investigation_on_Heat_Island_Effect_Chi(CC)v3.doc|熱島效應研究]] (Worksheet)[[File:Cclogo.jpg]] (撰稿人：博愛醫院陳楷紀念中學林耀基)[[Image:NEW.gif]] | ||
*[[Media:Investigation_on_Heat_Island_Effect_Eng_CC_v3.doc|Investigation on Micro Urban Heat Island Effect]] (Worksheet)[[File:Cclogo.jpg]] (Contributed by Mr. Lam Yiu Kei of POH Chan Kai Memorial College)[[Image:NEW.gif]] | |||
==熱夜== | ==熱夜== | ||
Latest revision as of 07:44, 7 February 2014
Investigation
Powerpoint
- Urban Heat Island Effect (Contributed by Matthew Wong of the Department of Applied Physics, The Hong Kong Polytechnic University)
- Weather and Our Environment (Contributed by Matthew Wong of the Department of Applied Physics, The Hong Kong Polytechnic University)
Worksheet
- Micro Urban Heat Island Effect (Worksheet)
(Contributed by Matthew Wong of the Department of Applied Physics, The Hong Kong Polytechnic University)
- 城市微熱島效應 (Worksheet) (撰稿人：香港理工大學應用物理學系黃文翰)
- F.1 climatic change project handbook 09-10 teachers edition (contributed by Mr Vincent Lee of Tak Sun Secondary School)
- 熱島效應研究 (Worksheet) (撰稿人：博愛醫院陳楷紀念中學林耀基)
- Investigation on Micro Urban Heat Island Effect (Worksheet) (Contributed by Mr. Lam Yiu Kei of POH Chan Kai Memorial College)
熱夜
(From HKO Director's Blog --- 星期五, 2010年 11月 26日)
許多市民問香港天氣是否越來越熱。答案當然是‘正確’，但實際情況跟我們一般理解有所不同。
由於香港高度城市化，一些熱能特別是來自太陽的熱力會被大廈、馬路及其他建築物吸收，令市區的日間溫度通常較新界地區為低。相信大家都知道由於位於九龍市中心，天文台的日間溫度通常都是較新界地區(例如打鼓嶺)低一兩度(圖一)。
晚間時分，情況剛好逆轉。建築物及基建將日間儲存的熱能釋放，令晚間城市溫度高於郊區。
早前本港舉行了全城無冷氣日。我找同事幫忙，計算了戰後到現在六十年間天文台錄得「熱夜」的變化。熱夜是指當天低溫達到 28 度或以上的晚上。結果參考圖二。
圖二清楚指出，五十年代平均的熱夜數目基本上寥寥可數，但到本世紀第一個十年已升至每年超過 20 天。
談到熱夜，打鼓嶺的情況完全不同。該處至今仍可算是郊區。除 2004 年僅得一天外，過去十年沒有出現熱夜，風扇足可令人感到涼快。這角度看，是一個氣候宜人的地方。
那麼，未來十年城市的情況會變得怎樣? 我們將未來可能發生的排放情況(由現有生活模式完全不變至到全力減排)引致的溫度轉變匯集後，得出的平均數字是 : 到 2020 年，熱夜數目會超過兩倍，達到每年 55 天。而日間溫度達到 33 度以上的日子，也會由每年 13 天倍增至 27 天。
在愈趨炎熱的天氣下，如果我們不改變生活的模式，社會便會消耗更多的化石能源。更多二氧化碳會排放到大氣，從而令地球進一步增溫，惡性循環愈演愈烈。
Questions
Explore what materials inside the city absorb heat most. catergorise them and tell the principle behind.
References
- Mapping Manchester's urban heat island Sylvia Knight1,*, Claire Smith2, Michael Roberts3 Weather Volume 65, Issue 7, pages 188–193, July 2010http://onlinelibrary.wiley.com/doi/10.1002/wea.542/abstract
- Pupils in UK Join Climate Survey (From BBC News) http://news.bbc.co.uk/2/hi/uk_news/england/7929584.stm
- Adapting our cities for future climates: 17 February 2010 (Royal Met Soc UK) http://onlinelibrary.wiley.com/doi/10.1002/wea.602/full