مؤتمر
Sudden high concentration of TSP affected by atmospheric boundary layer in Seoul metropolitan area during duststorm period
| العنوان: | Sudden high concentration of TSP affected by atmospheric boundary layer in Seoul metropolitan area during duststorm period |
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| المؤلفون: | Choi, H., Zhang, Y. H., Kim, K. H. |
| المساهمون: | Choi, H (reprint author), Kangnung Natl Univ, Dept Atmospher Environm Sci, Kangnung 210702, Gangwondo, South Korea., Kangnung Natl Univ, Dept Atmospher Environm Sci, Kangnung 210702, Gangwondo, South Korea., Peking Univ, Coll Environm Sci & Engn, Joint Key Lab Environm Simulat & Pollut Control, Beijing 100871, Peoples R China., Sejong Univ, Dept Earth & Environm Sci, Seoul 143747, South Korea. |
| المصدر: | EI ; SCI |
| سنة النشر: | 2008 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | TSP, PM10, PM2.5, dust storm, convective boundary layer, frontal passage, LONG-RANGE TRANSPORT, ASIAN DUST, YELLOW SAND, ACE-ASIA, KOREA, CIRCULATION, SIMULATION, AEROSOLS, ISLAND, MODEL |
| الوصف: | Hourly concentrations of TSP, PM10, PM2.5 near the surface at Seoul city were examined from March 20 to March 25, 2001 (duststorm event) in order to investigate the effect of a duststorm generated in China on the local aerosol concentration in Korea, The ratios of fine to coarse particles such as TSP to PM10, TSP to PM2.5 and PM10-PM2.5 to PM2.5 showed that a great amount of dust transported from the origin of the duststorm was remarkable with a maximum ratio of 9.77 between TSP and PM2.5. Back trajectories every 6 h showed the movement of dust particles in the lower atmosphere near 500 in to 1500 m (atmospheric boundary layer), which implied transport from Baotou in inner Mongolia of northern China to the direction of Seoul city in Korea and then the back trajectories passed near the southern border of Mongolia and Baotou through Zengzhou in the midlevels (3000 m) and low levels (500 m) of China, finally reaching Seoul city. So, the TSP concentration at Seoul city was partially influenced by the duststorm, under the prevailing westerly wind and the transported aerosols could influence high concentrations of pollutants of TSP, PM 10 and PM2.5 in Seoul. The sudden high concentrations of TSP and PM10 were found for a few hours, especially at 1500 to 1800 LST, March 22. At 1200 LST, before the passage of a cold front through the Korean peninsula, the convective boundary layer (CBL) near Seoul was not shallow, but at 1500 LST, under the frontal passage, the CBL was remarkably thinner (less than 300 m), due to the compression of the boundary layer by the intrusion of cold air. This resulted in the increase of the TSP concentration, even though the mixed layer above maintained almost the same depth. At 1800 LST shortly after the frontal passage, that is, near sunset, the nocturnal cooling of the ground caused air parcels to cool, thereby enhancing the shallower nocturnal surface inversion layer and producing the maximum concentration of TSP of 1388 mu g/m(3) near Seoul city. (C) 2008 Elsevier Ltd. All rights reserved. ... |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| تدمد: | 0160-4120 |
| العلاقة: | ENVIRONMENT INTERNATIONAL.2008/7/1,34(635-647).; 959454; http://hdl.handle.net/20.500.11897/248771Test; WOS:000257619600010 |
| DOI: | 10.1016/j.envint.2007.12.023 |
| الإتاحة: | https://doi.org/20.500.11897/248771Test https://doi.org/10.1016/j.envint.2007.12.023Test https://hdl.handle.net/20.500.11897/248771Test |
| رقم الانضمام: | edsbas.37159D0D |
| قاعدة البيانات: | BASE |
| تدمد: | 01604120 |
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| DOI: | 10.1016/j.envint.2007.12.023 |