In situ aerosol characterization at Cape Verde. Part 1: Particle number size distributions, hygroscopic growth and state of mixing of the marine and Saharan dust aerosol

IF 2.3 4区地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES

Tellus Series B-Chemical and Physical Meteorology Pub Date : 2011-01-01 DOI:10.3402/TELLUSB.V63I4.16345

A. Schladitz, T. Müller, A. Nowak, K. Kandler, K. Lieke, A. Massling, A. Wiedensohler

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引用次数: 40

Abstract

Particle number size distributions and hygroscopic properties of marine and Saharan dust aerosol were investigated during the SAMUM-2 field study at Cape Verde in winter 2008. Aitken and accumulation mode particles were mainly assigned to the marine aerosol, whereas coarse mode particles were composed of sea-salt and a variable fraction of Saharan mineral dust. A new methodical approach was used to derive hygroscopic growth and state of mixing for a particle size range (volume equivalent) from dp ve = 26 nm to 10 μm. For hygroscopic particles with dp ve 250 nm. The mixing state of Saharan dust in terms of the number fraction of nearly hydrophobic particles showed the highest variation and ranges from 0.3 to almost 1. This study was used to perform a successful mass closure at ambient conditions and demonstrates the important role of hygroscopic growth of large sea-salt particles. DOI: 10.1111/j.1600-0889.2011.00569.x

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佛得角的现场气溶胶表征。第1部分:海洋和撒哈拉沙尘气溶胶的颗粒数、大小分布、吸湿生长和混合状态

2008年冬季在佛得角进行的SAMUM-2实地研究期间，对海洋和撒哈拉沙尘气溶胶的颗粒数、大小分布和吸湿特性进行了调查。艾特肯模式和累积模式粒子主要属于海洋气溶胶，而粗模式粒子则由海盐和可变比例的撒哈拉矿物粉尘组成。采用了一种新的方法来推导从dp = 26 nm到10 μm的粒径范围(体积当量)的吸湿生长和混合状态。适用于吸湿性颗粒，dp值为250nm。撒哈拉沙尘混合状态在近疏水颗粒数分数上变化最大，在0.3 ~ 1之间。该研究用于在环境条件下成功地进行质量闭合，并证明了大型海盐颗粒的吸湿生长的重要作用。DOI: 10.1111 / j.1600-0889.2011.00569.x

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Tellus Series B-Chemical and Physical Meteorology 地学-气象与大气科学

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期刊介绍： Tellus B: Chemical and Physical Meteorology along with its sister journal Tellus A: Dynamic Meteorology and Oceanography, are the international, peer-reviewed journals of the International Meteorological Institute in Stockholm, an independent non-for-profit body integrated into the Department of Meteorology at the Faculty of Sciences of Stockholm University, Sweden. Aiming to promote the exchange of knowledge about meteorology from across a range of scientific sub-disciplines, the two journals serve an international community of researchers, policy makers, managers, media and the general public.