Cloud condensation nuclei measurements in the high troposphere and in jet aircraft exhaust

被引：12
|
作者：
Hudson, JG [1 ]
Xie, YH [1 ]
机构：
[1] Univ Nevada, Desert Res Inst, Reno, NV 89506 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 09期
关键词：
D O I：
10.1029/97GL03705
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Extensive measurements of cloud condensation nuclei (CCN) spectra (1 to 0.02% supersaturation; S) at altitudes up to 12 km are presented. These were similar to many marine boundary layer measurements when normalized to standard sea level pressure. Extremely low CCN concentrations (< 10 cm(-3)) were sometimes found in association with very high CN (condensation nuclei) concentrations (> 3000 cm(-3)). This was suggestive of cloud scavenging of CCN and production of small particles. Measurements in the exhaust of a B-757 jet aircraft showed very high CCN/CN ratios and enhancements of CCN concentrations for all S. This suggests a greater impact of jet aircraft on clouds and climate than previous measurements.
引用
收藏
页码：1395 / 1398
页数：4
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