Long-term observations of the background aerosol at Cabauw, The Netherlands

Show full item record



Permalink

http://hdl.handle.net/10138/315654

Citation

Mamali , D , Mikkilä , J , Henzing , B , Spoor , R , Ehn , M , Petäjä , T , Russchenberg , H & Biskos , G 2018 , ' Long-term observations of the background aerosol at Cabauw, The Netherlands ' , The Science of the Total Environment , vol. 625 , pp. 752-761 . https://doi.org/10.1016/j.scitotenv.2017.12.136

Title: Long-term observations of the background aerosol at Cabauw, The Netherlands
Author: Mamali, D.; Mikkilä, J.; Henzing, B.; Spoor, R.; Ehn, M.; Petäjä, T.; Russchenberg, H.; Biskos, G.
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2018-06-01
Language: eng
Number of pages: 10
Belongs to series: The Science of the Total Environment
ISSN: 0048-9697
URI: http://hdl.handle.net/10138/315654
Abstract: Long-term measurements of PM2.5 mass concentrations and aerosol particle size distributions from 2008 to 2015, as well as hygroscopicity measurements conducted over one year (2008-2009) at Cabauw, The Netherlands, are compiled here in order to provide a comprehensive dataset for understanding the trends and annual variabilities of the atmospheric aerosol in the region. PM2.5 concentrations have a mean value of 14.4 mu g m(-3) with standard deviation 2.1 mu g m(-3), and exhibit an overall decreasing trend of -0.74 mu g m(-3) year(-1). The highest values are observed in winter and spring and are associated with a shallower boundary layer and lower precipitation, respectively, compared to the rest of the seasons. Number concentrations of particles smaller than 500 nm have a mean of 9.2 x 10(3) particles cm(-3) and standard deviation 4.9x10(3) particles cm(-3), exhibiting an increasing trend between 2008 and 2011 and a decreasing trend from 2013 to 2015. The particle number concentrations exhibit highest values in spring and summer (despite the increased precipitation) due to the high occurrence of nucleation-mode particles, which most likely are formed elsewhere and are transported to the observation station. Particle hygroscopicity measurements show that, independently of the air mass origin, the particles are mostly externally mixed with the more hydrophobic mode having a mean hygroscopic parameter kappa of 0.1 while for the more hydrophilic mode kappa is 0.35. The hygroscopicity of the smaller particles investigated in this work (i.e., particles having diameters of 35 nm) appears to increase during the course of the nucleation events, reflecting a change in the chemical composition of the particles. (C) 2017 Elsevier B.V. All rights reserved.
Subject: Air pollution
Atmospheric particles
PM2.5
SMPS
HTDMA
BOUNDARY-LAYER DEPTH
SIZE DISTRIBUTIONS
PARTICLE FORMATION
VARIABILITY
NUMBER
IMPACT
SITE
SPECTROMETER
DEPOSITION
EVENTS
114 Physical sciences
1172 Environmental sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Mamali2018_manuscript_final_pre3pdf.pdf 1.095Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record