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| Titel |
High-frequency boundary layer profiling with reusable radiosondes |
| VerfasserIn |
D. Legain, O. Bousquet, T. Douffet, D. Tzanos, E. Moulin, J. Barrie, J.-B. Renard |
| 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. 8 ; Nr. 6, no. 8 (2013-08-29), S.2195-2205 |
| Datensatznummer |
250085049
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| Publikation (Nr.) |
 copernicus.org/amt-6-2195-2013.pdf |
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| Zusammenfassung |
| A new system for high-frequency boundary layer profiling based upon
radiosondes and free balloons was tested during the field phases of the
Boundary Layer Late Afternoon and Sunset Turbulence experiment (BLLAST 2011,
Lannemezan, France) and of the Hydrological cycle in the Mediterranean
Experiment (HyMeX, 2012). The system consists of a conventional Vaisala
receiver and a GPS radiosonde (pressure, wind, humidity and temperature),
that is tied to a couple of inflated balloons. The principle of the sounding
system is to permit the first balloon to detach from the rawinsonde at a
predetermined altitude, allowing for the rawinsonde to slowly descend with the
second balloon to perform a second, new sounding. The instrumentation is
then eventually recovered. The expecting landing area is anticipated before
the flight by estimating the trajectory of the probe from a forecasted wind
profile and by specifying both the balloon release altitude and the mean
ascent and descent rates of the system. The real landing point is determined
by the last transmission of the radiosonde GPS and the visual landmark
provided by the second balloon. Seventy-two soundings were performed during
BLLAST (62) and HyMeX (10), with a recovery rate of more than 80% during
the BLLAST field campaign. Recovered radiosondes were generally reused
several times, often immediately after recovery, which definitely
demonstrates the high potential of this system. |
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