DOI: 10.1016/j.atmosenv.2013.09.054
Scopus记录号: 2-s2.0-84886257106
论文题名: Aerosol size distributions observed at Naiman in the Asian dust source region of Inner Mongolia
作者: Park S ; -U ; , Park M ; -S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 82 起始页码: 17
结束页码: 23
语种: 英语
英文关键词: Aerosol size distribution
; Asian dust particle
; Dust source region
; Naiman site
; Spectral mass concentration distribution
Scopus关键词: Aerosol size distributions
; Asian dust
; Dust sources
; Mass concentration
; Naiman site
; Advection
; Aerosols
; Gages
; Meteorological instruments
; Microchannels
; Particle size
; Size distribution
; Dust
; aerosol
; atmospheric pollution
; concentration (composition)
; dust
; flux measurement
; observational method
; particle size
; pollutant source
; size distribution
; advection
; aerosol size distribution
; air sampling
; article
; Asian
; dust
; environmental parameters
; mass
; Mongolia
; particulate matter
; priority journal
; quartz crystal microbalance
; Asia
; China
; Naiman
; Nei Monggol
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Aerosol size distributions of observed mass concentrations at the Naiman site in Inner Mongolia that is one of the major Asian dust source regions have been examined for the period from April 2010 to July 2012. The total number of 262 sampled data using the 10-stage quartz crystal microbalance (QCM) cascade impactor is obtained by presetting the frequency changes of 40Hz during April 2010, 60Hz for the period of 28 April-16 September 2010 and 70Hz from 1 November 2010-29 July 2012. The total mass concentrations (PM10) measured by the QCM cascade impactor are modified to have the same sampling time of 60min with the help of the 1-h averaged PM10 concentration measured by the beta gauge at the same site. These modified QCM data are classified into the local dust emission case of 196 and the dust advection case of 66. The local dust emission case is defined when the calculated dust flux with the two-level (3m and 15m high) measured PM10 concentrations by the beta-gauge is upward and the PM10 concentration measured at 3m high exceeds 100μgm-3 while all the rest of QCM sampled data are classified as the dust advection case. The results indicate that the spectral mass concentration distribution of the local dust emission case shows a two-modal distribution with one additional mode of the large particle that cannot be resolved by the QCM cascade impactor whereas that of the advection case reveals a three-modal distribution with one additional unresolved large particle mode. The percent spectral mass concentration distribution of the unresolved mode (stage 1) for the local dust emission case is larger than that for the dust advection case. The modal distributions of both cases can be regressed optimally with log-normal distribution functions. The resolved log-normal distribution functions of the mass concentration distribution by the QCM cascade impactor are found to be the particle mean diameter (the standard deviation) of 0.28 (2.07) and 3.15μm (1.41μm) for the local emission case and 0.16 (1.51), 0.60 (1.41) and 2.88μm (1.38μm) for the advection case. This clearly suggests that the spectral mass concentration shifts toward the larger particle size for the local emission case. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81231
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Atmospheric and Environmental Modeling, Byucksan 1-cha Digital Valley RM. 1101-2, Guro-dong, Guro-gu, Seoul 152-775, South Korea; Weather Information Service Engine, Center for Atmospheric Science and oEarthquake Research, 12Fl., 434, World Cup buk-ro, Mapo-gu, Seoul 121-835, South Korea
Recommended Citation:
Park S,-U,, Park M,et al. Aerosol size distributions observed at Naiman in the Asian dust source region of Inner Mongolia[J]. Atmospheric Environment,2014-01-01,82