1 / 33

Measured parameters: particle backscatter at 355 and 532 nm, particle extinction at 355 nm,

BASIL - DIFA-Univ. of BASILicata Raman Lidar. Location: Potenza, 40°38'45.23" N 15°48'29.32" E, 730 m asl. Measured parameters: particle backscatter at 355 and 532 nm, particle extinction at 355 nm, lidar ratio at 355 nm, particle depolarization at 355 nm, atmospheric temperature

reuben
Download Presentation

Measured parameters: particle backscatter at 355 and 532 nm, particle extinction at 355 nm,

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BASIL - DIFA-Univ. of BASILicata Raman Lidar Location: Potenza, 40°38'45.23" N 15°48'29.32" E, 730 m asl • Measured parameters: • particle backscatter at 355 and 532 nm, • particle extinction at 355 nm, • lidar ratio at 355 nm, • particle depolarization at 355 nm, • atmospheric temperature • water vapour mixing ratio. • relative humidity measurements obtained from simultaneous lidar measurements of water vapour and temperature. SEA-TAINER WITH SIZE THAT ALSO ALLOW EASY TRANSPORTATION ON ROAD 3rd COPS & GOP Workshop, 10/11 April

  2. BASIL LASER: Nd:YAG laser (Quanta Systems – SYL 202) Max. Pulse Energy@ 355nm 250 mJ Maximum repetition rate 20Hz Beam divergence 0.5 mrad Pulse duration 5 ÷ 6 ns RECEIVING SYSTEM: Newtonian telescope Primary mirror diameter 0.4 m Combined focal length 1.8 m Field of view 0.5 mrad DETECTORS: photomultipliers Photocathode = Bialkali Quantum efficiency @ 355 nm= 20 % Gain = 2x106 ACQUISITION: photon counting mode Minimum dwell time 100 ns Bandwidth 125 MHz SPECTRAL SELECTION: based on Interference Filters Aerosol/clouds N2 H2O T(LoJ) T(HiJ) Wavelength (nm) 532 355 387 407 354.1-5 352.5-353.5 Bandwidth (nm) 1.0 0.5 1.0 0.3 0.3 1.0 Out-of-band blocking 10-6 10-6 10-10 10-10 10-6 10-6 CW Transmission (%) 50 30 30 30 30 30 Optimized for both night-time and day-time operation Vertical pointing capability only 3rd COPS & GOP Workshop, 10/11 April

  3. BASIL Measurement precision Water Vapor Mixing Ratio DIFA-Univ. Basilicata 5 minute 150 meters Dt=5 min, Dz=150 meters • day <5% up to 2 km • night <2% up to 2 km, <20% up to 6km Up to 13 km with 30 min time integration 3rd COPS & GOP Workshop, 10/11 April

  4. BASIL Measurement precision Temperature BASIL BASIL Dt = 5 minute Dz = 150 meters Dt=5 min, Dz=150 meters • day < 2 K up to 2 km • night <1 K up to 2 km, <2 K up to 7 km Up to 26 km with 1h30 min time integration Up to 36 km with ≈ 8h min time integration 3rd COPS & GOP Workshop, 10/11 April

  5. 12 11 10 9 8 7 6 5 4 3 2 BASIL - DIFA - Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 06-07 September 2004 – Particle backscattering at 355 nm (m-1 sr-1) Height a.s.l. (m) 17:32 00:33 19:52 22:13 02:55 DT = 1 min, Dz = 30 m GMT Time 3rd COPS & GOP Workshop, 10/11 April

  6. 12 11 10 9 8 7 6 5 4 3 2 BASIL - DIFA - Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 06-07 September 2004 – Water vapour mixing ratio (g/Kg) Height a.s.l. (m) 17:32 00:33 19:52 22:13 02:55 GMT Time DT = 1 min, Dz = 30 m 3rd COPS & GOP Workshop, 10/11 April

  7. 12 11 10 9 8 7 6 5 4 3 2 BASIL-DIFA - Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 06 September 2004 – Particle extinction at 355 nm (m-1) Height a.s.l. (m) 17:32 00:33 19:52 22:13 02:55 GMT Time DT = 1 min, Dz = 300 m 3rd COPS & GOP Workshop, 10/11 April

  8. 12 11 10 9 8 7 6 5 4 3 2 BASIL-DIFA - Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 06 September 2004 – Extinction-to-backscatter ratio at 355 nm (sr) Height a.s.l. (m) 17:32 00:33 19:52 22:13 02:55 GMT Time GMT Time Lidar ratio 20-25 sr Typical for cirrus clouds & altostratus DT = 1 min, Dz = 300 m Lidar ratio 40-80 sr Typical for aerosols in PBL

  9. BASIL-DIFA - Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 06 September 2004 – Temperature (K) 11 10 9 8 Height a.s.l. (m) 7 6 5 4 3 2 17:32 00:33 19:52 22:13 02:55 GMT Time GMT Time DT = 5 min, Dz = 300 m 3rd COPS & GOP Workshop, 10/11 April

  10. 12 11 10 9 8 7 6 5 4 3 2 BASIL- DIFA - Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 06 September 2004 – Relative humidity (with respect to water) % Height a.s.l. (m) 17:32 00:33 19:52 22:13 02:55 GMT Time GMT Time Upper tropospheric humidification due to cirrus sublimation DT = 10 min, Dz = 300 m

  11. BASIL (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 01-03 October 2005 – Water Vapour mixing ratio Dry stratospheric intrusion episode associated with aof tropopause folding event (g/Kg) 12730 10330 7930 Height a.s.l. (m) 5530 Log Scale 3130 730 18:05 02:35 10:25 02:15 18:15 GMT Time 01 October 03 October 02 October DT=10min; Dz=75m <5km 150m >5km 3rd COPS & GOP Workshop, 10/11 April

  12. 1-2 October 2005 – Water Vapour mixing ratio (g/kg) 12730 10330 7930 Height a.s.l. (m) 5530 Log Scale 3130 730 01:15 04:50 08:25 18:05 21:40 UT Time 3rd COPS & GOP Workshop, 10/11 April

  13. 1-2 October 2005 – Atmospheric temperature (K) 12730 10330 7930 Height a.s.l. (m) 5530 3130 730 01:15 04:50 08:25 18:05 21:40 UT Time 3rd COPS & GOP Workshop, 10/11 April

  14. 1-2 October 2005 – Relative humidity (%) 12730 10330 7930 Height a.s.l. (m) 5530 Log Scale 3130 730 01:15 04:50 08:25 18:05 21:40 UT Time 3rd COPS & GOP Workshop, 10/11 April

  15. WATER VAPOUR MIXING RATIO DT=10min; Dz=150m

  16. Data provided for assimilation purposes: Specific humidityAtmospheric temperature • Based on the requests from the data assimilation people, • 10 minute integration time (6 profiles per hour) This allows to get a measuement error not exceeding 20 % up to approx. 7-8 km at night and up to approx. 4 km in daytime. Vertical resolution for water vapour: 75 mup to5 km 150 m above 5 km Vertical resolution for temperature 600 m Data have been delivered in NetCDF format. 3rd COPS & GOP Workshop, 10/11 April

  17. BACK-UP SLIDES

  18. Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 11-12 October 2005 – Water Vapour mixing ratio (g/Kg) 12730 10330 7930 Height a.s.l. (m) 5530 3130 730 17:55 22:55 04:15 13:35 14:55 09:25 GMT Time 12 October 11 October DT=10min; Dz=75m <5km 150m >5km

  19. Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 11-12 October 2005 – Water Vapour mixing ratio (g/Kg) 12730 10330 7930 Height a.s.l. (m) 5530 Log Scale 3130 730 17:55 22:55 04:15 13:35 14:55 09:25 GMT Time 12 October 11 October DT=10min; Dz=75m <5km 150m >5km

  20. Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 11-12 October 2005 – Relative error (%) 12730 10330 7930 Height a.s.l. (m) 5530 Log Scale 3130 730 17:55 22:55 04:15 13:35 14:55 09:25 GMT Time 12 October 11 October DT=10min; Dz=75m <5km 150m >5km

  21. WATER VAPOUR MIXING RATIO TEMPERATURE

  22. Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 11-12 October 2005 – Temperature (K) 12730 10330 7930 Height a.s.l. (m) 5530 3130 730 17:55 22:55 04:15 14:55 GMT Time 12 October 11 October DT=10min; Dz=600 m

  23. Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 11-12 October 2005 – Temperature error (K) 12730 10330 7930 Height a.s.l. (m) 5530 3130 730 17:55 22:55 04:15 14:55 GMT Time 12 October 11 October DT=10min; Dz=600 m

  24. Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 01-03 October 2005 – Water Vapour mixing ratio Stratospheric dry air intrusion associated with aof tropopause folding event (g/Kg) 12730 10330 7930 Height a.s.l. (m) 5530 3130 730 18:05 02:35 10:25 02:15 18:15 GMT Time 01 October 03 October 02 October DT=10min; Dz=75m <5km 150m >5km PV-streamer event

  25. Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 01-03 October 2005 – Relative error (%) 12730 10330 7930 Height a.s.l. (m) 5530 3130 730 18:05 02:35 10:25 02:15 18:15 GMT Time 01 October 03 October 02 October DT=10min; Dz=75m <5km 150m >5km

  26. Stratospheric dry air intrusion associated with aof tropopause folding event 1 October 2005 – water vapour mixing ratio (g/kg) 12730 10330 7930 Height a.s.l. (m) 5530 3130 730 01:12 04:49 08:26 17:48 21:36 GMT Time PRELIMINARY DATA DT=1min Dz=30m

  27. Stratospheric dry air intrusion associated with aof tropopause folding event PRELIMINARY DATA °K 1 October 2005 – Temperature 12730 10330 TO BE CORRECTED FOR PILE_UP 7930 Height a.s.l. (m) 5530 3130 Same trend on the temperature and humidity map The dry layer tongue is associated with lower temperatues 730 01:12 04:49 08:26 17:48 21:36 GMT Time DT=5min Dz=300m

  28. Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 26-28 October 2005 – Water Vapour mixing ratio (g/Kg) 12730 10330 7930 Height a.s.l. (m) 5530 FOG 3130 730 17:13 00:55 00:12 8:38 16:24 GMT Time PRELIMINARY DATA DT=3min Dz=120m

  29. Wave structures underlieing thick clouds and appearing to be associated with the approachig of the cloud system 12 September 2005 – Water Vapour mixing ratio (g/Kg) 6730 5530 THICK CLOUDS 4330 3130 1930 730 14:52 16:12 19:24 22:17 waves GMT Time PRELIMINARY DATA DT=1min Dz=30m 12 Oct,10:30-12 Oct, 22:20 GMT

  30. STRONG CONVECTIVE ACTIVITY 19-20 October 2005 – Water Vapour mixing ratio (g/Kg) 12730 10330 7930 Height a.s.l. (m) 5530 3130 STRONG CONVECTIVE ACTIVITY 730 10:28 14:17 03:44 21:00 GMT Time PRELIMINARY DATA DT=3min Dz=120m

  31. Cloud formation possibly associated with the propagation of a gravity wave 27-28 September 2005 – Water Vapour mixing ratio (g/Kg) 12730 10330 7930 5530 CLOUDS 3130 730 wave 14:57 19:15 23:36 03:54 06:40 GMT Time PRELIMINARY DATA DT=1min Dz=30m 27 Sept,14:55-28 Set, 18:15 GMT

  32. Cloud formation possibly associated with the propagation of a gravity wave 27-28 September 2005– Particle backscattering at 355 nm (m-1 sr-1) 12730 10330 7930 5530 CLOUDS 3130 730 wave 14:57 19:15 23:36 03:54 06:40 GMT Time PRELIMINARY DATA DT=1min Dz=30m

  33. Stratospheric dry intrusion event probably associated with aof tropospheric folding event (m-1 sr-1) 1 October 2005– Particle backscattering at 355 nm 12730 10330 7930 Height a.s.l. (m) 5530 3130 730 17:48 GMT Time PRELIMINARY DATA DT=1min Dz=30m

More Related