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| Titel |
Ceilometer aerosol profiling versus Raman lidar in the frame of the INTERACT campaign of ACTRIS |
| VerfasserIn |
F. Madonna, F. Amato, J. Hey, G. Pappalardo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 5 ; Nr. 8, no. 5 (2015-05-29), S.2207-2223 |
| Datensatznummer |
250116370
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| Publikation (Nr.) |
 copernicus.org/amt-8-2207-2015.pdf |
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| Zusammenfassung |
Despite their differences from more advanced and more powerful lidars, the
low construction and operation cost of ceilometers (originally designed for
cloud base height monitoring) has fostered their use for the quantitative
study of aerosol properties. The large number of ceilometers available
worldwide represents a strong motivation to investigate both the extent to
which they can be used to fill in the geographical gaps between advanced
lidar stations and also how their continuous data flow can be linked to
existing networks of the more advanced lidars, like EARLINET (European
Aerosol Research Lidar Network).
In this paper, multi-wavelength Raman lidar measurements are used to
investigate the capability of ceilometers to provide reliable information
about atmospheric aerosol properties through the INTERACT (INTERcomparison
of Aerosol and Cloud Tracking) campaign carried out at the CNR-IMAA
Atmospheric Observatory (760 m a.s.l., 40.60° N, 15.72° E), in the framework
of the ACTRIS (Aerosol Clouds Trace gases Research InfraStructure) FP7
project. This work is the first time that three different commercial
ceilometers with an advanced Raman lidar are compared over a period of 6 months. The comparison of the attenuated backscatter coefficient profiles
from a multi-wavelength Raman lidar and three ceilometers (CHM15k, CS135s,
CT25K) reveals differences due to the expected discrepancy in the signal to noise ratio (SNR) but
also due to changes in the ambient temperature on the short and mid-term
stability of ceilometer calibration. Therefore, technological improvements
are needed to move ceilometers towards operational use in the monitoring of
atmospheric aerosols in the low and free troposphere. |
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