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| Titel |
Pure rotational-Raman channels of the Esrange lidar for temperature and particle extinction measurements in the troposphere and lower stratosphere |
| VerfasserIn |
P. Achtert, M. Khaplanov, F. Khosrawi, J. Gumbel |
| 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 ; 6, no. 1 ; Nr. 6, no. 1 (2013-01-11), S.91-98 |
| Datensatznummer |
250017373
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| Publikation (Nr.) |
 copernicus.org/amt-6-91-2013.pdf |
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| Zusammenfassung |
| The Department of Meteorology at Stockholm University operates the
Esrange Rayleigh/Raman lidar at Esrange (68° N,
21° E) near the Swedish city of Kiruna. This paper
describes the design and first measurements of the new pure
rotational-Raman channel of the Esrange lidar. The Esrange lidar
uses a pulsed Nd:YAG solid-state laser operating at 532 nm
as light source with a repetition rate of 20 Hz and a pulse
energy of 350 mJ. The minimum vertical resolution is 150 m and
the integration time for one profile is 5000 shots. The newly
implemented channel allows for measurements of atmospheric
temperature at altitudes below 35 km and is currently
optimized for temperature measurements between 180 and
200 K. This corresponds to conditions in the lower Arctic
stratosphere during winter. In addition to the temperature
measurements, the aerosol extinction coefficient and the aerosol
backscatter coefficient at 532 nm can be measured
independently. Our filter-based design minimizes the systematic
error in the obtained temperature profile to less than
0.51 K. By combining rotational-Raman measurements
(5–35 km height) and the integration technique
(30–80 km height), the Esrange lidar is now capable of
measuring atmospheric temperature profiles from the upper
troposphere up to the mesosphere. With the improved setup, the
system can be used to validate current lidar-based polar
stratospheric cloud classification schemes. The new capability of
the instrument measuring temperature and aerosol extinction
furthermore enables studies of the thermal structure and variability
of the upper troposphere/lower stratosphere. Although several lidars
are operated at polar latitudes, there are few instruments that are
capable of measuring temperature profiles in the troposphere,
stratosphere, and mesosphere, as well as aerosols extinction in the
troposphere and lower stratosphere with daylight capability. |
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