دورية أكاديمية
Aerosol Optical Hygroscopicity Measurements during the 2010 CARES Campaign
| العنوان: | Aerosol Optical Hygroscopicity Measurements during the 2010 CARES Campaign |
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| المؤلفون: | Atkinson, Dean B., Radney, James Gregory, Lum, Janel, Kolesar, Katheryn R., Cziczo, Daniel J., Pekour, Mikhail, Zhang, Qi, Setyan, Ari, Zelenyuk, Alla, Cappa, Christopher D. |
| المصدر: | Chemistry Faculty Publications and Presentations |
| بيانات النشر: | PDXScholar |
| سنة النشر: | 2015 |
| المجموعة: | Portland State University: PDXScholar |
| مصطلحات موضوعية: | Light -- Scattering -- Measurement, Aerosols -- Optical properties, Atmospheric aerosols, Chemistry, Other Civil and Environmental Engineering |
| الوصف: | Measurements of the effect of water uptake on particulate light extinction or scattering made at two locations during the 2010 CARES study around Sacramento, CA are reported. The observed influence of water uptake, characterized through the dimensionless optical hygroscopicity parameter γ, is compared with calculations constrained by observed particle size distributions and size-dependent particle composition. A closure assessment has been carried out that allowed for determination of the average hygroscopic growth factors (GF) at 85% relative humidity and the dimensionless hygroscopicity parameter κ for oxygenated organic aerosol (OA) and for supermicron particles, yielding κ = 0.1–0.15 and 0.9–1.0, respectively. The derived range of oxygenated OA κ values are in line with previous observations. The relatively large values for supermicron particles is consistent with substantial contributions of sea salt-containing particles in this size range. Analysis of time-dependent variations in the supermicron particle hygroscopicity suggest that atmospheric processing, specifically chloride displacement by nitrate and the accumulation of secondary organics on supermicron particles, can lead to substantial depression of the observed GF. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| العلاقة: | https://pdxscholar.library.pdx.edu/chem_fac/104Test; https://pdxscholar.library.pdx.edu/context/chem_fac/article/1103/viewcontent/atkinson_aerosol_optical_hygroscopicity.pdfTest |
| DOI: | 10.5194/acp-15-4045-2015 |
| الإتاحة: | https://doi.org/10.5194/acp-15-4045-2015Test https://pdxscholar.library.pdx.edu/chem_fac/104Test https://pdxscholar.library.pdx.edu/context/chem_fac/article/1103/viewcontent/atkinson_aerosol_optical_hygroscopicity.pdfTest |
| رقم الانضمام: | edsbas.B858223D |
| قاعدة البيانات: | BASE |
| DOI: | 10.5194/acp-15-4045-2015 |
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