In-situ measurement of smoke particles in the wintertime polar mesosphere between 80 and 85 km altitude

被引：38

作者：

Arnyx, K. ^{[1
]}

Sternovsky, Z. ^{[1
]}

Knappmiller, S. ^{[2
]}

Robertson, S. ^{[2
]}

Horanyi, M. ^{[1
,2
]}

Gumbel, J. ^{[3
]}

机构：

[1] Univ Colorado, LASP, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[3] Stockholm Univ, Dept Meteorol, S-10691 Stockholm, Sweden

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2008年 / 70卷 / 01期

基金：

美国国家航空航天局;

关键词：

meteoric smoke; In-situ measurement; mesosphere; dust charging;

D O I：

10.1016/j.jastp.2007.09.013

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The MAGIC sounding rocket, launched in January 2005 into the polar mesosphere, carried two detectors for charged aerosol particles. The detectors are graphite patch collectors mounted flush with the skin of the payload and are connected to sensitive electrometers. The measured signal is the net current deposited on the detectors by heavy aerosol particles. The collection of electrons and ions is prevented by magnetic shielding and a small positive bias, respectively. Both instruments detected a layer of heavy aerosol particles between 80 and 85 km with a number density approximately 10(3) cm(-3). Aerodynamic flow simulations imply that the collected particles are larger than similar to 1 nm in radius. The particles are detected as a net positive charge deposited on the graphite collectors. It is suggested that the measured positive polarity is due to the electrification of the smoke particles upon impact on the graphite collectors. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：61 / 70

页数：10

共 56 条

[21] Simulation of rocket-borne particle measurements in the mesosphere [J].