On small particles in the Arctic summer boundary layer : observations at two different heights near Ny-Alesund, Svalbard

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

Tellus Series B-Chemical and Physical Meteorology Pub Date : 2009-04-01 DOI:10.1111/J.1600-0889.2008.00412.X

J. Ström, Ann-Christine Engvall, F. Delbart, R. Krejci, R. Treffeisen

引用次数: 38

Abstract

Concurrent observations of particle number densities and size distributions observed at two different heights (near ocean level and 475 m above sea level) in Ny-Alesund, Svalbard were studied with respect to the diurnal variation during a summer period in June 2004. The results show that observed variation in particle number density in the Arctic boundary layer may be strongly modulated by vertical mixing and dilution. The particles appeared to be formed in the early morning when solar intensity reached about 30% of the mid-day intensity. Based on differences in the observed number densities at the two heights it appears as if particles are formed in the lower part of the boundary layer. The formation rate of 10 nm diameter particles is estimated to be 0.11 cm -3 s -1 and the growth rate is in a range between 1 and 2 nm h -1 . DOI: 10.1111/j.1600-0889.2008.00412.x

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北极夏季边界层中的小颗粒:在斯瓦尔巴群岛新奥勒松附近两个不同高度的观测

研究了2004年6月夏季在斯瓦尔巴群岛新奥勒松两个不同高度(近海平面和海拔475 m)同时观测到的颗粒数密度和粒径分布的日变化。结果表明，观测到的北极边界层粒子数密度变化可能受到垂直混合和稀释的强烈调制。这些粒子似乎是在太阳强度达到正午强度30%左右的清晨形成的。根据在两个高度观测到的数密度的差异，似乎粒子是在边界层的下部形成的。10 nm直径颗粒的形成速率估计为0.11 cm -3 s -1，生长速率在1 ~ 2 nm h -1之间。DOI: 10.1111 / j.1600-0889.2008.00412.x

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来源期刊

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.