کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4450277 1620556 2012 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spatio-temporal variability of anions in wet precipitation of Cuiabá, Brazil
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
Spatio-temporal variability of anions in wet precipitation of Cuiabá, Brazil
چکیده انگلیسی

Spatio-temporal variability in the ionic chemical composition of atmospheric precipitation samples was investigated at twenty-six points in Cuiabá city, Brazil, during three rainfall events from October 2009 to February 2010. All samples were analyzed for pH, electrical conductivity and ions: chloride (Cl−), fluoride (F−), nitrate (NO3−), sulfate (SO42 −) and phosphate (PO43 −). The spatial dependence and variability of the rainwater's ionic composition were evaluated through semivariograms and kriging. A large proportion of the samples were characterized as acid rain: 80.77% of samples in October, 80.77% in December, and 65.38% in February. The average concentrations of Cl−, F−, NO3−, SO42 −and PO43 − were 4.43, 0.29, 3.78, 1.00 and 0.02 μeq L− 1, respectively. A strong correlation was observed between NO3−and SO42 − indicating a common anthropogenic origin of these anions. Maps generated by geostatistical techniques indicated that the highest anion concentrations occurred at the beginning of the rainy season in the industrial district and during periods of lower rainfall in the city center, indicating the important role of local emission sources.


► Spatio-temporal variability of the rainwater's anion composition was evaluated.
► Highest anion concentrations occurred at the beginning of the rainy season in the industrial district.
► During the periods of lower rainfall in the city center occurred highest anion concentrations in center city.
► We conclude an important role of anthropogenic origin of local emission sources.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Research - Volume 107, April 2012, Pages 9–19
نویسندگان
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