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Features: High-power differential-absorption lidar Range: 3 - 12 km (SFH outside the PBL)

Institut für Meteorologie und Klimaforschung, Bereich Atmosphärische Umweltforschung (IMK-IFU), Garmisch-Partenkirchen Lidar Sounding of Free-tropospheric Water Vapour at a High-altitude Station Thomas Trickl, Hannes Vogelmann. Features: High-power differential-absorption lidar

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Features: High-power differential-absorption lidar Range: 3 - 12 km (SFH outside the PBL)

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  1. Institut für Meteorologie und Klimaforschung, Bereich Atmosphärische Umweltforschung (IMK-IFU), Garmisch-Partenkirchen Lidar Sounding of Free-tropospheric Water Vapour at a High-altitude Station Thomas Trickl, Hannes Vogelmann Features: High-power differential-absorption lidar Range: 3 - 12 km (SFH outside the PBL) Vertical resolution: 50-250 m Accuracy: 5 % under average conditions Wide spectral tuning range Good overlap with Zugspitze FTIR (2962 m) Other instrumentation: 2 high-spectral-resolution FTIRs (Garmisch, Zugspitze), GPS, research aeroplane, in-situ instrumentation NDSC (NDACC) primary site 2675 m a.s.l.

  2. Vertical range of ground-based DIAL measurements

  3. History of the narrow-band tunable pulsed lasers Dye lasers: 1975: Wallenstein, Hänsch: E = 0.5 mJ, Δt = 10 ns, Δ = 85 MHz (460 nm) 1976: Blit, Ganiel, Treves: E = 50 mJ, Δt = 0.5 ms, Δ = 30 MHz (585 nm) 1987: Cromwell, Trickl, Kung, Lee: E = 130 mJ, Δt = 10 ns, Δ = 52 MHz (563 nm) 1997: Eikema, Ubachs, Vassen, Hogervorst: E = 220 mJ, Δt = 6.5 ns, Δ = 90 MHz (585 nm) Solid-state lasers: 1996: Grützmacher, Steiger: 265 mJ at 729 nm Trickl, Vogelmann: E =700 mJ, Δ = 100 MHz (800 nm) ???

  4. Durch Minimum an

  5. June 2004: Start of lidar measurements Noon! ETH Zürich

  6. Intrusion November 11, 2004 ETH Zürich Zugspitze

  7. Validation, October 2005 Radiosonde: Meteorological Institute, University of Munich, launched in the valley Conclusions: 1. An order-of-magnitude increase in S/N is possible. 2. The planned range up to at least 12 km looks realistic.

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