Mixture state and size of Asian dust particles collected at southwestern Japan in spring 2000

doi:10.1029/2003JD003869

	Mixture state and size of Asian dust particles collected at southwestern Japan in spring 2000
	Zhang, DZ ; Iwasaka, Y ; Shi, GY ; Zang, JY ; Matsuki, A ; Trochkine, D
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2003-12-17
卷号	108 期号:D24
关键词	Asian dust composition size
ISSN号	2169-897X
DOI	10.1029/2003JD003869
英文摘要	Atmospheric particles were collected at Kumamoto (32degrees48'N, 130degrees45'E), a coastal city in southwestern Japan, during three dust storm events in spring 2000. The elemental composition and size of individual dust particles and their mixture state with sea salt, sulfate, and nitrate were analyzed using electron microscopes and an energy dispersive X-ray spectrometer. About 60similar to85% of dust particles were internally mixed with sea salt. Weather records indicated these particles were most probably formed by the collisions and coagulations of dust particles and sea-salt particles. The relative weight ratios of mineral components to sea salt in individual particles showed that the mixtures of particles were dominated by mineral, by sea salt, or by both. Size distributions of the particles segregated by the mixture levels of mineral and sea salt in the three dust storm events were similar and all distributions showed a diameter range of 1similar to8 mum with maximum mode around 3 mum. Out of 1similar to8 mum, dust particles were rarely detected. The combination of dust particles with sea salt caused an increase in size of the dust particles. Therefore the decrease of particle concentrations in the range of diameter >3 mum suggests the critical diameter for dust particle dispersion was possibly around 3 mum and a dust particle might be removed rapidly if it became larger than this scale in the marine atmosphere. Detection of sulfate and nitrate revealed that 91% or more dust particles contained sulfate and 27% or less contained nitrate. The comparisons of the relative weight ratios of sodium, sulfur, and chlorine in mixture particles and in sea-salt particles confirmed previous results that mineral materials could enhance particulate sulfate and nitrate formation and restrain chlorine depletion from the sea-salt components in mixture particles.
WOS关键词	NORTH PACIFIC-OCEAN ; MARINE BOUNDARY-LAYER ; LONG-RANGE TRANSPORT ; SEA-SALT SULFATE ; STORM PARTICLES ; EAST-ASIA ; MINERAL AEROSOL ; TROPOSPHERIC CHEMISTRY ; APRIL 1998 ; ACID-RAIN
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000187858300012
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25770]
专题	自然资源部第一海洋研究所
通讯作者	Zhang, DZ
作者单位	1.Prefectural Univ Kumamoto, Fac Environm & Symbiot Sci, Kumamoto 8628502, Japan 2.Nagoya Univ, Grad Sch Environm Sci, Nagoya, Aichi 4648601, Japan 3.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China 4.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 5.Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan
推荐引用方式 GB/T 7714	Zhang, DZ,Iwasaka, Y,Shi, GY,et al. Mixture state and size of Asian dust particles collected at southwestern Japan in spring 2000[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2003,108(D24).
APA	Zhang, DZ,Iwasaka, Y,Shi, GY,Zang, JY,Matsuki, A,&Trochkine, D.(2003).Mixture state and size of Asian dust particles collected at southwestern Japan in spring 2000.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,108(D24).
MLA	Zhang, DZ,et al."Mixture state and size of Asian dust particles collected at southwestern Japan in spring 2000".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 108.D24(2003).