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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kim, Young J. Kim, Kyung W. Oh, Seung J. |
| Copyright Year | 2001 |
| Abstract | Continuous visibility monitoring has been carried out inKwangju, Korea since May 1999. The total light extinctioncoefficient b ext measured by a transmissometer andreveals seasonal trends in urban visual air quality,especially under hazy conditions with a visual range of lessthan 15 km. Seasonal atmospheric visibility under lowrelative humidity during the winter was observed to be betterthan during any other seasons. Summertime visibility wasseverely degraded due to highly increased light scattering byhygroscopic particles under high humidity atmosphericconditions. Visibility during spring and fall was alsomoderate. However, yellow sand in spring caused the lowestvisibility conditions over the measurement area for a fewdays. With continuous monitoring using the transmissometer,the daily average seasonal visual range was measured to be13.1, 9.2, 11.0, and 13.9 km in spring, summer, falland winter, respectively. Under the atmospheric humiditycondition less than 60%, visual range was observed tobe 16.1, 13.9, 15.1, and 16.6 km in spring, summer,fall, and winter, respectively. The mean light extinctionbudget by sulfate and nitrate aerosols was determined to bethe highest value of 63.71% during the summer and thelowest value of 27.08% during spring. During the `yellow sand dust' period, a mean light extinction budget by soil particles was estimated to be at an unusually high value of 44.22%. |
| Starting Page | 35 |
| Ending Page | 46 |
| Page Count | 12 |
| File Format | |
| ISSN | 01676369 |
| Journal | Environmental Monitoring and Assessment |
| Volume Number | 70 |
| Issue Number | 1-2 |
| e-ISSN | 15732959 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Publisher Date | 2001-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Ecology Atmospheric Protection/Air Quality Control/Air Pollution Environmental Management Monitoring/Environmental Analysis/Environmental Ecotoxicology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pollution Medicine Management, Monitoring, Policy and Law |
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