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| Titel |
A permanent Raman lidar station in the Amazon: description, characterization, and first results |
| VerfasserIn |
H. M. J. Barbosa, B. Barja, T. Pauliquevis, D. A. Gouveia, P. Artaxo, G. G. Cirino, R. M. N. Santos, A. B. Oliveira |
| 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 ; 7, no. 6 ; Nr. 7, no. 6 (2014-06-18), S.1745-1762 |
| Datensatznummer |
250115821
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| Publikation (Nr.) |
 copernicus.org/amt-7-1745-2014.pdf |
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| Zusammenfassung |
| A permanent UV Raman lidar station, designed to perform continuous
measurements of aerosols and water vapor and aiming to study and
monitor the atmosphere from weather to climatic time scales,
became operational in the central Amazon in July 2011. The automated
data acquisition and internet monitoring enabled extended hours of
daily measurements when compared to a manually operated instrument.
This paper gives a technical description of the system, presents its
experimental characterization and the algorithms used for obtaining
the aerosol optical properties and identifying the cloud layers.
Data from one week of measurements during the dry season of 2011
were analyzed as a mean to assess the overall system capability and
performance. Both Klett and Raman inversions were
successfully applied. A comparison of the aerosol optical depth
from the lidar and from a co-located Aerosol Robotic Network (AERONET) sun photometer showed
a correlation coefficient of 0.86. By combining nighttime
measurements of the aerosol lidar ratio (50–65 sr),
back-trajectory calculations and fire spots observed from
satellites, we showed that observed particles originated from biomass
burning. Cirrus clouds were observed in 60% of our
measurements. Most of the time they were distributed into three
layers between 11.5 and 13.4 km a.g.l. The systematic and
long-term measurements being made by this new scientific facility
have the potential to significantly improve our understanding of the
climatic implications of the anthropogenic changes in aerosol
concentrations over the pristine Amazonia. |
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