Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-5297-2017 |
Ground-based characterization of aerosol spectral optical properties of haze and Asian dust episodes under Asian continental outflow during winter 2014 | |
Jung, Jinsang1; Yu, JeongAh2; Lyu, Youngsook2; Lee, Minhee2; Hwang, Taekyung2; Lee, Sangil1 | |
2017-04-24 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea |
英文摘要 | Long-range transported (LRT) haze can affect the regional radiation budget and the air quality in areas downwind of the Asian continental outflow. Because in situ observations of spectral aerosol optical properties of the LRT haze are rare, an intensive characterization of aerosol optical properties is needed. This study characterized the spectral optical properties of the LRT haze and Asian dust originating from the Asian continent. Integrated chemical and optical measurements of aerosol particles were carried out in a downwind area of the Asian continental outflow (Daejeon, South Korea) during winter 2014. High concentrations of PM10 (particulate matter with a diameter <= 10 mu m) and light scattering coefficients at 550 nm, sigma(s,550), were observed during a long-range transport (LRT) haze episode (PM10 = 163.9 +/- 25.0 mu g m(-3); sigma(s, 550) = 503.4 +/- 60.5Mm(-1) ) and Asian dust episode (PM10 = 211.3 +/- 57.5 mu g m(-3); sigma(s. 550) = 560.9 +/- 151Mm(-1)). During the LRT haze episode, no significant change in the relative contribution of PM2.5 (particulate matter with a diameter <= 2.5 mu m) chemical components was observed as particles accumulated under stagnant atmospheric conditions (13-17 January 2014), suggesting that the increase in PM2.5 mass concentration was caused mainly by the accumulation of LRT pollutants. On the other hand, a gradual decrease in Angstrm exponent (angstrom) and a gradual increase in single scattering albedo (omega) and mass scattering efficiency (MSE) were observed during the stagnant period, possibly due to an increase in particle size. These results imply that a change in particle size rather than chemical composition during the stagnant period is the dominant factor affecting the aerosol optical properties. During the Asian dust episode, a low PM2.5/PM10 ratio and angstrom(450/700) were observed with average values of 0.59 +/- 0.06 and 1.08 +/- 0.14, respectively, which were higher than those during the LRT haze episode (0.75 +/- 0.06 and 1.39 +/- 0.05, respectively), indicating that PM2.5/PM10 mass ratios and angstrom(450/700) can be used as tracers to distinguish aged LRT haze and Asian dust under the Asian continental outflow. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399916400004 |
WOS关键词 | LONG-RANGE TRANSPORT ; ATMOSPHERIC AEROSOL ; KOREAN PENINSULA ; AIR-POLLUTION ; MEGA-CITY ; URBAN ; APPORTIONMENT ; SENSITIVITY ; GUANGZHOU ; IMPACT |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/23866 |
专题 | 地球科学 |
作者单位 | 1.Korea Res Inst Stand & Sci, Ctr Gas Anal, Daejeon 34113, South Korea; 2.Natl Inst Environm Res, Dept Climate & Air Qual Res, Daejeon 34944, South Korea |
推荐引用方式 GB/T 7714 | Jung, Jinsang,Yu, JeongAh,Lyu, Youngsook,et al. Ground-based characterization of aerosol spectral optical properties of haze and Asian dust episodes under Asian continental outflow during winter 2014[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(8). |
APA | Jung, Jinsang,Yu, JeongAh,Lyu, Youngsook,Lee, Minhee,Hwang, Taekyung,&Lee, Sangil.(2017).Ground-based characterization of aerosol spectral optical properties of haze and Asian dust episodes under Asian continental outflow during winter 2014.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(8). |
MLA | Jung, Jinsang,et al."Ground-based characterization of aerosol spectral optical properties of haze and Asian dust episodes under Asian continental outflow during winter 2014".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.8(2017). |
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