The Spectral Aerosol Extinction Monitoring System (SǼMS): setup, observational products, and comparisons

The Spectral Aerosol Extinction Monitoring System (SǼMS) is presented that allows us to continuously measure the spectral extinction coefficient of atmospheric aerosol particles along an approximately 2.7 km long optical path at 30–50 m height above ground in Leipzig (51.3° N, 12.4° E), Germany. The...

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Main Authors: A. Skupin, A. Ansmann, R. Engelmann, H. Baars, T. Müller
Format: Article
Language:English
Published: Copernicus Publications 2014-03-01
Series:Atmospheric Measurement Techniques
Online Access:http://www.atmos-meas-tech.net/7/701/2014/amt-7-701-2014.pdf
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spelling doaj-e5f010c5b5aa43b392e82810812d40522020-11-24T22:35:07ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482014-03-017370171210.5194/amt-7-701-2014The Spectral Aerosol Extinction Monitoring System (SǼMS): setup, observational products, and comparisonsA. Skupin0A. Ansmann1R. Engelmann2H. Baars3T. Müller4Leibniz Institute for Tropospheric Research TROPOS, Permosserstraße 15, 04318 Leipzig, GermanyLeibniz Institute for Tropospheric Research TROPOS, Permosserstraße 15, 04318 Leipzig, GermanyLeibniz Institute for Tropospheric Research TROPOS, Permosserstraße 15, 04318 Leipzig, GermanyLeibniz Institute for Tropospheric Research TROPOS, Permosserstraße 15, 04318 Leipzig, GermanyLeibniz Institute for Tropospheric Research TROPOS, Permosserstraße 15, 04318 Leipzig, GermanyThe Spectral Aerosol Extinction Monitoring System (SǼMS) is presented that allows us to continuously measure the spectral extinction coefficient of atmospheric aerosol particles along an approximately 2.7 km long optical path at 30–50 m height above ground in Leipzig (51.3° N, 12.4° E), Germany. The fully automated instrument measures the ambient aerosol extinction coefficients from 300 to 1000 nm. The main goal of SǼMS observations are long-term studies of the relationship between particle extinction and relative humidity from below 40% to almost 100%. The setup is presented and observations (a case study and statistical results for 2009) are discussed in terms of time series of 550 nm particle optical depth, Ångström exponent, and particle size distribution retrieved from the spectrally resolved extinction. The SǼMS measurements are compared with simultaneously performed EARLINET (European Aerosol Research Lidar Network) lidar, AERONET (Aerosol Robotic Network) sun photometer, and in situ aerosol observations of particle size distribution and related extinction coefficients on the roof of our institute. Consistency between the different measurements is found, which corroborates the quality of the SǼMS observations. Statistical results of a period of 1 yr (2009) show mode extinction values of 0.09 km<sup>−1</sup> (SǼMS), 0.075 km<sup>−1</sup> (AERONET), and 0.03 km<sup>−1</sup> (in situ). &Aring;ngström exponents for this period are 0.19 (390–880 nm, SǼMS) and 1.55 (440–870 nm, AERONET).http://www.atmos-meas-tech.net/7/701/2014/amt-7-701-2014.pdf
collection DOAJ
language English
format Article
sources DOAJ
author A. Skupin
A. Ansmann
R. Engelmann
H. Baars
T. Müller
spellingShingle A. Skupin
A. Ansmann
R. Engelmann
H. Baars
T. Müller
The Spectral Aerosol Extinction Monitoring System (SǼMS): setup, observational products, and comparisons
Atmospheric Measurement Techniques
author_facet A. Skupin
A. Ansmann
R. Engelmann
H. Baars
T. Müller
author_sort A. Skupin
title The Spectral Aerosol Extinction Monitoring System (SǼMS): setup, observational products, and comparisons
title_short The Spectral Aerosol Extinction Monitoring System (SǼMS): setup, observational products, and comparisons
title_full The Spectral Aerosol Extinction Monitoring System (SǼMS): setup, observational products, and comparisons
title_fullStr The Spectral Aerosol Extinction Monitoring System (SǼMS): setup, observational products, and comparisons
title_full_unstemmed The Spectral Aerosol Extinction Monitoring System (SǼMS): setup, observational products, and comparisons
title_sort spectral aerosol extinction monitoring system (sǽms): setup, observational products, and comparisons
publisher Copernicus Publications
series Atmospheric Measurement Techniques
issn 1867-1381
1867-8548
publishDate 2014-03-01
description The Spectral Aerosol Extinction Monitoring System (SǼMS) is presented that allows us to continuously measure the spectral extinction coefficient of atmospheric aerosol particles along an approximately 2.7 km long optical path at 30–50 m height above ground in Leipzig (51.3° N, 12.4° E), Germany. The fully automated instrument measures the ambient aerosol extinction coefficients from 300 to 1000 nm. The main goal of SǼMS observations are long-term studies of the relationship between particle extinction and relative humidity from below 40% to almost 100%. The setup is presented and observations (a case study and statistical results for 2009) are discussed in terms of time series of 550 nm particle optical depth, Ångström exponent, and particle size distribution retrieved from the spectrally resolved extinction. The SǼMS measurements are compared with simultaneously performed EARLINET (European Aerosol Research Lidar Network) lidar, AERONET (Aerosol Robotic Network) sun photometer, and in situ aerosol observations of particle size distribution and related extinction coefficients on the roof of our institute. Consistency between the different measurements is found, which corroborates the quality of the SǼMS observations. Statistical results of a period of 1 yr (2009) show mode extinction values of 0.09 km<sup>−1</sup> (SǼMS), 0.075 km<sup>−1</sup> (AERONET), and 0.03 km<sup>−1</sup> (in situ). &Aring;ngström exponents for this period are 0.19 (390–880 nm, SǼMS) and 1.55 (440–870 nm, AERONET).
url http://www.atmos-meas-tech.net/7/701/2014/amt-7-701-2014.pdf
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