Forest fires in Northern region of Portugal: Impact on PM levels

被引:14
作者
Slezakova, Klara [1 ,2 ]
Morais, Simone [2 ]
Pereira, Maria do Carmo [1 ]
机构
[1] Univ Porto, Fac Engn, Dept Engn Quim, LEPAE, P-4200465 Oporto, Portugal
[2] Inst Super Engn Porto, REQUIMTE, P-4200072 Oporto, Portugal
关键词
Air pollution; Forest fires; PM10; PM2.5; Climate change; PARTICULATE AIR-POLLUTION; TRAFFIC EMISSIONS; MORTALITY; AEROSOL; MATTER; PARTICLES; URBAN; EXPOSURE; QUALITY;
D O I
10.1016/j.atmosres.2012.07.012
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Every year European citizens become victims of devastating fires, which are especially disastrous for Southern European countries. Apart from the numerous health and economic consequences, fires generate hazardous pollutants that are introduced into the environment, thus representing serious risks for public health. In that regard, particulate matter (PM) is of a major concern. Thus, the objectives of this work were to characterize the trend of forest fire occurrences and burnt area during the period of 2005 and 2010 and to study the influence of forest fires on levels of particulate matter PM10 and PM2.5. In 2010, 22,026 forest fires occurred in Portugal. The northern region was the most affected by forest fires, with 27% of occurrences in Oporto district. The annual means of PM10 and PM2.5 concentrations at two urban background sites were 25 +/- 14 mu g m(-3) and 8.2 +/- 4.9 mu g m(-3), and 17 +/- 13 mu g m(-3) and 73 +/- 5.9 mu g m(-3), respectively. At both sites the highest levels of PM fractions were observed during July and August of 2010, corresponding to the periods when majority (66%) of forest fires occurred. Furthermore, PM10 daily limit at the two sites was exceeded during 20 and 5 days, respectively; 56%, and respectively 60% of those exceedances occurred during the forest fire season. Considering that the risks of forest fire ignition and severity are enhanced with elevated temperatures, the climate change might increase the environmental impacts of forest fires. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:148 / 153
页数:6
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