کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4442012 1311133 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
State of mixture of atmospheric submicrometer black carbon particles and its effect on particulate light absorption
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
State of mixture of atmospheric submicrometer black carbon particles and its effect on particulate light absorption
چکیده انگلیسی

The state of mixture of light-absorbing carbonaceous particles was investigated in relation to light absorption properties using electron microscopic examinations, black carbon (BC) analyses of quartz filter by thermal/optical reflectance (TOR) method, measurements with two continuous light-absorbing photometers at a suburban site of Tsukuba, about 60 km northeast of Tokyo. The volume fraction of water-soluble material (ɛ) in individual particles is important for assessing particulate light-absorbing and/or scattering of atmospheric aerosols. The values of ɛ in BC particles were evaluated by electron micrographs before and after dialysis (extraction) of water-soluble material. The mass absorption coefficient (MAC in units of m2 g−1) tended to increase with increasing the average ɛ in BC particles with the radius range of 0.05–0.5 μm. Thus, our results indicate that coatings of water-soluble material around BC particles can enhance the absorption of solar radiation. Moreover, the single scattering albedo (SSA) will increase because a large amount of coating material will scatter more light.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 43, Issue 6, February 2009, Pages 1296–1301
نویسندگان
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