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題名 Desert heat island study in winter by mobile transect and remote sensing techniques 作者 Sun,Chen-Yi ;Brazel,Anthony J. ;Chow,Winston T. L. ;Hedquist,Brent C. ;Prashad,Lela 貢獻者 政大地政系 日期 2009-10 上傳時間 2013-09-13 摘要 A familiar problem in urban environments is the urban heat island (UHI), which potentially increases air conditioning demands, raise pollution levels, and could modify precipitation patterns. The magnitude and pattern of UHI effects have been major concerns of a lot of urban environment studies. Typically, research on UHI magnitudes in arid regions (such as Phoenix, AZ, USA) focuses on summer. UHI magnitudes in Phoenix (more than three million population) attain values in excess of 5°C. This study investigated the early winter period—a time when summer potential evapotranspiration >250 mm has diminished to <90 mm. An analysis of the winter magnitude of the heat island in Phoenix has been studied very little, and therefore with the aid of automobile transects, fixed stations, and remote sensing techniques, we investigated a portion of the large Phoenix metropolitan area known as the East Valley. The eastern fringes of the metropolitan area abut against breaks in sloping terrain. The highest UHI intensity observed was >8.0°C, comparable to summertime UHI conditions. Through analysis of the Oke (1998) weather factor ΦW, it was determined thermally induced nighttime cool drainage winds could account for inflating the UHI magnitude in winter. 關聯 Theoretical and Applied Climatology, 98(3/4), 323-335 資料類型 article dc.contributor 政大地政系 en_US dc.creator (作者) Sun,Chen-Yi ;Brazel,Anthony J. ;Chow,Winston T. L. ;Hedquist,Brent C. ;Prashad,Lela en_US dc.date (日期) 2009-10 en_US dc.date.accessioned 2013-09-13 - dc.date.available 2013-09-13 - dc.date.issued (上傳時間) 2013-09-13 - dc.identifier.uri (URI) http://nccur.lib.nccu.edu.tw/handle/140.119/60796 - dc.description.abstract (摘要) A familiar problem in urban environments is the urban heat island (UHI), which potentially increases air conditioning demands, raise pollution levels, and could modify precipitation patterns. The magnitude and pattern of UHI effects have been major concerns of a lot of urban environment studies. Typically, research on UHI magnitudes in arid regions (such as Phoenix, AZ, USA) focuses on summer. UHI magnitudes in Phoenix (more than three million population) attain values in excess of 5°C. This study investigated the early winter period—a time when summer potential evapotranspiration >250 mm has diminished to <90 mm. An analysis of the winter magnitude of the heat island in Phoenix has been studied very little, and therefore with the aid of automobile transects, fixed stations, and remote sensing techniques, we investigated a portion of the large Phoenix metropolitan area known as the East Valley. The eastern fringes of the metropolitan area abut against breaks in sloping terrain. The highest UHI intensity observed was >8.0°C, comparable to summertime UHI conditions. Through analysis of the Oke (1998) weather factor ΦW, it was determined thermally induced nighttime cool drainage winds could account for inflating the UHI magnitude in winter. en_US dc.format.extent 734999 bytes - dc.format.mimetype application/pdf - dc.language.iso en_US - dc.relation (關聯) Theoretical and Applied Climatology, 98(3/4), 323-335 en_US dc.title (題名) Desert heat island study in winter by mobile transect and remote sensing techniques en_US dc.type (資料類型) article en
