کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6317008 1619174 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of urban density on carbon dioxide exchanges: Observations of dense urban, suburban and woodland areas of southern England
ترجمه فارسی عنوان
تأثیر چگالی شهری در مبادلات دی اکسید کربن: مشاهدات مناطق متراکم شهری، حومه و جنگل جنوبی انگلستان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی
Anthropogenic and biogenic controls on the surface-atmosphere exchange of CO2 are explored for three different environments. Similarities are seen between suburban and woodland sites during summer, when photosynthesis and respiration determine the diurnal pattern of the CO2 flux. In winter, emissions from human activities dominate urban and suburban fluxes; building emissions increase during cold weather, while traffic is a major component of CO2 emissions all year round. Observed CO2 fluxes reflect diurnal traffic patterns (busy throughout the day (urban); rush-hour peaks (suburban)) and vary between working days and non-working days, except at the woodland site. Suburban vegetation offsets some anthropogenic emissions, but 24-h CO2 fluxes are usually positive even during summer. Observations are compared to estimated emissions from simple models and inventories. Annual CO2 exchanges are significantly different between sites, demonstrating the impacts of increasing urban density (and decreasing vegetation fraction) on the CO2 flux to the atmosphere.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 198, March 2015, Pages 186-200
نویسندگان
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