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	Production of space charge at the boundaries of layer clouds
	Zhou, Limin; Tinsley, Brian A.
刊名	Journal of geophysical research-atmospheres
	2007-06-06
卷号	112期号:D11页码:17
ISSN号	0148-0227
DOI	10.1029/2006jd007998
通讯作者	Zhou, limin()
英文摘要	The ionosphere-earth current density j(z) creates space charge at the upper and lower boundaries of layer clouds. this occurs because clouds have an order of magnitude lower conductivity than the clear air at the same altitude, and as the current density flows through the boundaries, it creates a gradient of electric field that must be satisfied by the accumulation of space charge, according to gauss's law. we have modeled the production of space charge and its partition between charges on droplets, aerosol particles, and ions and performed sensitivity tests for the variation of a number of relevant atmospheric parameters. we find typical droplet charges of 50-100 elementary charges, positive at cloud top and negative at cloud base, consistent with recent observations. the charges are of sufficient magnitude to suggest measurable electrical effects on scavenging of ice-forming nuclei and cloud condensation nuclei. the results are relevant to the modeling of solar or internally forced changes of j(z) and space charge on cloud microphysics as a possible cause of small effects on weather and climate.
WOS关键词	AEROSOL ATTACHMENT COEFFICIENTS ; WEAK ELECTRIFICATION ; PARTICLES ; CONDUCTIVITY ; DROPLETS
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000247140800005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2383174
专题	中国科学院大学
通讯作者	Zhou, Limin
作者单位	1.Univ Texas, WB Hanson Ctr Space Sci, Richardson, TX 75083 USA 2.Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Limin,Tinsley, Brian A.. Production of space charge at the boundaries of layer clouds[J]. Journal of geophysical research-atmospheres,2007,112(D11):17.
APA	Zhou, Limin,&Tinsley, Brian A..(2007).Production of space charge at the boundaries of layer clouds.Journal of geophysical research-atmospheres,112(D11),17.
MLA	Zhou, Limin,et al."Production of space charge at the boundaries of layer clouds".Journal of geophysical research-atmospheres 112.D11(2007):17.

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