کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9458779 | 1311300 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A comparison of bulk and wet-only deposition at two adjacent sites in Melle (Belgium)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
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چکیده انگلیسی
During 9 months, the weekly bulk and wet-only precipitation depositions in an urbanised region of Flanders (Belgium) were compared at two sites with a different height and separated by 1Â km. The amount of rainfall at the two sites was similar, and the difference in ion deposition between the two sites was generally less than 5%. While the amount of rainfall measured was almost the same for both collector types, bulk deposition was significantly (p<0.02) higher than the wet deposition of all ions other than H+ and NH4+. Averaged for both sites, bulk deposition was 129% (K+), 84% (Ca2+), 51% (Clâ), 50% (Mg2+), 46% (Na+), 32% (SO42â), 27% (NO3â), 17% (Fâ), and 11% (NH4+) higher than wet-only deposition. The acidity of bulk samples was significantly (p<0.06) lower than the acidity of wet-only samples. Bulk NH4+ concentrations were only significantly (p<0.002) higher than wet-only concentrations at one site because of the sensor-related, delayed closing of the wet-only lid at the second site. Although dry deposition significantly contributed to bulk precipitation measurements, bulk deposition exceeded the wet acidifying deposition of NO3â, NH4+, and SO42â by less than 25%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 39, Issue 1, January 2005, Pages 7-15
Journal: Atmospheric Environment - Volume 39, Issue 1, January 2005, Pages 7-15
نویسندگان
Jeroen Staelens, An De Schrijver, Philip Van Avermaet, Gerrit Genouw, Niko Verhoest,