Bursts of intermediate ions in atmospheric air

被引：112
作者：
Horrak, U [1 ]
Salm, J [1 ]
Tammet, H [1 ]
机构：
[1] Tartu State Univ, Inst Environm Phys, EE-2400 Tartu, Estonia
来源：
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 1998年 / 103卷 / D12期
关键词：
D O I：
10.1029/97JD01570
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
The mobility spectrum of air ions has been measured at Tahkuse Observatory in Estonia for several years. The average concentration of intermediate ions with mobilities of 0.05-0.5 cm(2) V-1 s(-1) in atmospheric air is about 50 cm(-3). On the level of this low background, high concentration bursts of intermediate air ions occur occasionally. A burst can be followed by subsequent evolution of intermediate ions into larger ones. To explain the bursts of intermediate air ions, two hypotheses can be advanced: (1) A burst of neutral particles occurs due to homogeneous nucleation, and the particles are charged by the attachment of cluster ions. (2) The cluster ions grow by ion-induced nucleation in proper environmental conditions.
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收藏
页码：13909 / 13915
页数：7
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