دانلود مقاله ISI انگلیسی شماره 70612
عنوان فارسی مقاله

تغییرات فضا - زمانی جزیره گرمایی شهر در دهلی نو

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
70612 2014 15 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Spatio – temporal variations of urban heat island over Delhi
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Urban Climate, Volume 10, Part 1, December 2014, Pages 119–133

کلمات کلیدی
تجمع حرارت شهری؛ MODIS؛ AOD؛ پوشش زمین؛ حرارتی
پیش نمایش مقاله
پیش نمایش مقاله تغییرات فضا - زمانی جزیره گرمایی شهر در دهلی نو

چکیده انگلیسی

Temporal and spatial trends of the surface urban heat island (UHI) formation over Delhi are examined with respect to aerosol load and land-cover variations. The study reveals that temperatures over Delhi are higher than those over the surrounding regions almost through-out the year during the night time. The nocturnal heat island intensity is minimum (0–2 K) during the monsoon months and maximum during the month of March (4–6 K). The UHI trends during the day-time are however, significantly different. It is observed that a day-time cool island forms over Delhi twice during the year in the months of May–June and October–December. Analysis of temporal variations in urban heat island intensity (UHII) and aerosol load over Delhi reveals a significant negative correlation between UHII and aerosol optical depth (AOD). Spatial analysis of LST, land-cover and AOD for the months of March, May and November confirms the significant role of AOD along with land-cover variables such as percentage area under the classes built-up, rock, vegetation and bare soil. Comparative analysis of LST in the regions lying north, south, east and west of Delhi in relation to the prevailing land-cover suggests that thermal inertia is also a very important factor determining the urban-rural thermal structure.

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