AEROSOL-PARTICLES IN THE MIDDLE TROPOSPHERE OVER THE NORTHWESTERN PACIFIC

被引：19

作者：

IKEGAMI, M

OKADA, K

ZAIZEN, Y

MAKINO, Y

机构：

[1] Meteorological Research Institute, Tsukuba, 305, Ibaraki

来源：

JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN | 1993年 / 71卷 / 04期

关键词：

D O I：

10.2151/jmsj1965.71.4_517

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Aircraft observation of aerosol particles was carried out at an altitude of approximately 4.5 km from 0-degrees-34-degrees-N during 7-10 March 1989. Marked spatial variation in the number concentrations of aerosol particles with radii between 0.15 and 5 mum was observed in the middle troposphere, with concentrations ranging from 0.1 to 10 cm-3. Sulfate containing particles (both H2SO4 and (NH4)2SO4) were present in the observation regions as an important background aerosol. However, high concentrations of particles were observed intermittently in the tropical atmosphere in association with the vertical transport of sea-salt particles through convective clouds. Asian dust-storm particles also contributed to high concentrations of particles with radii r greater-than-or-equal-to 1 mum at mid-latitudes. The present study suggests that the transport of sea-salt particles and mineral particles contribute strongly to increases in the number concentration of aerosol particles in the middle troposphere. Modification of sea-salt particles collected over the tropical region is also discussed in this paper.

引用

页码：517 / 528

页数：12

共 29 条

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