کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
143714 163465 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spatio-temporal variations of ozone and nitrogen dioxide concentrations under urban trees and in a nearby open area
ترجمه فارسی عنوان
تغییرات زمانی-مکانی غلظت ازن و دی اکسید نیتروژن در زیر درختان شهری و در یک منطقه نزدیک باز
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی


• O3 and NO2 concentrations under the Q. ilex canopies and in a nearby open area were measured with passive samplers.
• Quercus ilex attenuated the NO2 pollution in all seasons and O3 only in October 2013.
• In April and July, O3 concentrations under the Q. ilex canopy increased compared to open-field.

The evergreen Quercus ilex L. is one of the most common trees in Italian urban environments and is considered effective in the uptake of particulate and gaseous atmospheric pollutants. However, the few available estimates on O3 and NO2 removal by urban Q. ilex originate from model-based studies (which indicate NO2/O3 removal capacity of Q. ilex) and not from direct measurements of air pollutant concentrations. Thus, in the urban area of Siena (central Italy) we began long-term monitoring of O3/NO2 concentrations using passive samplers at a distance of 1, 5, 10 m from a busy road, under the canopies of Q. ilex and in a nearby open-field. Measurements performed in the period June 2011–October 2013 showed always a greater decrease of NO2 concentrations under the Q. ilex canopy than in the open-field transect. Conversely, a decrease of average O3 concentrations under the tree canopy was found only in autumn after the typical Mediterranean post-summer rainfalls. Our results indicate that interactions between O3/NO2 concentrations and trees in Mediterranean urban ecosystems are affected by temporal variations in climatic conditions. We argue therefore that the direct measurement of atmospheric pollutant concentrations should be chosen to describe local changes of aerial pollution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Urban Climate - Volume 12, June 2015, Pages 119–127
نویسندگان
, , , ,