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| Titel |
Raman Lidar for Meteorological Observations, RALMO – Part 2: Validation of water vapor measurements |
| VerfasserIn |
E. Brocard, R. Philipona, A. Haefele, G. Romanens, A. Mueller, D. Ruffieux, V. Simeonov, B. Calpini |
| 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. 5 ; Nr. 6, no. 5 (2013-05-22), S.1347-1358 |
| Datensatznummer |
250017897
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| Publikation (Nr.) |
 copernicus.org/amt-6-1347-2013.pdf |
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| Zusammenfassung |
| The Raman Lidar for Meteorological Observations (RALMO) was installed at the
MeteoSwiss Regional Center of Payerne, Switzerland, in summer 2008. One of
its aims is to provide continuous vertical profiles of tropospheric water
vapor during day and night at a high temporal resolution. Twelve months
(October 2009–September 2010) of lidar data are analyzed. During this period of time, the
lidar produced 9086 profiles, representing 52.6% of the time (this figure
reached 63.2% for the first 6 months of 2011). Under cloud-free conditions,
half of the profiles reached more than 8610 m above ground level at night,
and 4050 m during the day. In order to validate the capabilities of the
instrument, the year of lidar data was compared to the collocated
radiosondes. On average, lidar water vapor mixing ratio was found to be
within 5 to 10% of radiosonde values up to 8 km at night, and within 3% up
to 3 km during the day. Relative humidity results show an agreement within 2
and 5% for day and night, respectively. An integrated water vapor comparison
also shows a good correlation with both radiosondes and GPS measurements: the
lidar had a 4.2% dry bias compared to radiosondes and a 5.3% wet bias
compared to GPS. These results validate the performance of the lidar and the
humidity profiles with a 30 min time resolution. |
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