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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.

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Presentation on theme: "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."— Presentation transcript:

1 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. Location: Potenza, 40°38'45.23" N 15°48'29.32" E, 730 m asl BASIL - DIFA-Univ. of BASILicata Raman Lidar 3 rd COPS & GOP Workshop, 10/11 April SEA-TAINER WITH SIZE THAT ALSO ALLOW EASY TRANSPORTATION ON ROAD

2 DETECTORS: photomultipliers Photocathode = Bialkali Quantum efficiency @ 355 nm= 20 % Gain = 2x10 6 ACQUISITION: photon counting mode Minimum dwell time 100 ns Bandwidth 125 MHz RECEIVING SYSTEM: Newtonian telescope Primary mirror diameter 0.4 m Combined focal length1.8 m Field of view 0.5 mrad 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 SPECTRAL SELECTION: based on Interference Filters 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 Aerosol/clouds N 2 H 2 O T(LoJ) T(HiJ) BASIL 3 rd COPS & GOP Workshop, 10/11 April Optimized for both night-time and day-time operation Vertical pointing capability only

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

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

5 22:13 00:33 02:55 GMT Time 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 ) 17:32 19:52 11 10 9 5 4 3 2 6 8 7 12  T = 1 min,  z = 30 m Height a.s.l. (m) 3 rd COPS & GOP Workshop, 10/11 April

6 GMT Time (g/Kg) 11 10 9 5 4 3 2 6 8 7 12 22:13 00:33 02:55 17:32 19:52  T = 1 min,  z = 30 m 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 Height a.s.l. (m) 3 rd COPS & GOP Workshop, 10/11 April

7 (m -1 ) 02:55 GMT Time 11 10 9 5 4 3 2 6 8 7 12 22:13 00:3317:32 19:52  T = 1 min,  z = 300 m 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 Height a.s.l. (m) 3 rd COPS & GOP Workshop, 10/11 April

8 (sr) GMT Time 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 GMT Time 11 10 9 5 4 3 2 6 8 7 12 22:13 00:33 02:55 17:32 19:52  T = 1 min,  z = 300 m Height a.s.l. (m) Lidar ratio 20-25 sr Typical for cirrus clouds & altostratus Lidar ratio 40-80 sr Typical for aerosols in PBL

9 (K) GMT Time 11 10 9 5 4 3 2 6 8 7 22:13 00:33 02:55 17:32 19:52 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  T = 5 min,  z = 300 m Height a.s.l. (m) 3 rd COPS & GOP Workshop, 10/11 April

10 GMT Time 11 10 9 5 4 3 2 6 8 7 12 22:13 00:33 02:55 17:32 19:52 Height a.s.l. (m)  T = 10 min,  z = 300 m % 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) Upper tropospheric humidification due to cirrus sublimation

11 730 5530 3130 7930 10330 12730 GMT Time 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 (g/Kg) Height a.s.l. (m) 18:15 18:0510:2502:1502:35  T=10min;  z=75m 5km 01 October 02 October 03 October Log Scale Dry stratospheric intrusion episode associated with a of tropopause folding event 3 rd COPS & GOP Workshop, 10/11 April

12 730 5530 3130 7930 10330 12730 Height a.s.l. (m) UT Time 1-2 October 2005 – Water Vapour mixing ratio (g/kg) 18:0521:40 01:1504:5008:25 Log Scale 3 rd COPS & GOP Workshop, 10/11 April

13 730 5530 3130 7930 10330 12730 Height a.s.l. (m) UT Time 1-2 October 2005 – Atmospheric temperature (K) 18:0521:40 01:1504:5008:25 3 rd COPS & GOP Workshop, 10/11 April

14 730 5530 3130 7930 10330 12730 Height a.s.l. (m) UT Time 1-2 October 2005 – Relative humidity (%) 18:0521:40 01:1504:5008:25 Log Scale 3 rd COPS & GOP Workshop, 10/11 April

15  T=10min;  z=150m WATER VAPOUR MIXING RATIO

16 Data provided for assimilation purposes: Specific humidity Atmospheric temperature Vertical resolution for water vapour: 75 m up to 5 km 150 m above 5 km Vertical resolution for temperature 600 m 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. Data have been delivered in NetCDF format. 3 rd COPS & GOP Workshop, 10/11 April

17 BACK-UP SLIDES

18 730 5530 3130 7930 10330 12730 GMT Time 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) Height a.s.l. (m) 09:25 17:5504:1514:5522:55  T=10min;  z=75m 5km 11 October 12 October 13:35

19 730 5530 3130 7930 10330 12730 GMT Time 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) Height a.s.l. (m) 09:25 17:5504:1514:5522:55  T=10min;  z=75m 5km 11 October 12 October 13:35 Log Scale

20 730 5530 3130 7930 10330 12730 GMT Time 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 (%) Height a.s.l. (m) 09:25 17:5504:1514:5522:55  T=10min;  z=75m 5km 11 October 12 October 13:35 Log Scale

21 WATER VAPOUR MIXING RATIO TEMPERATURE

22 730 5530 3130 7930 10330 12730 GMT Time 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) Height a.s.l. (m) 17:5504:1514:5522:55  T=10min;  z=600 m 11 October 12 October

23 730 5530 3130 7930 10330 12730 GMT Time 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) Height a.s.l. (m) 17:5504:1514:5522:55  T=10min;  z=600 m 11 October 12 October

24 730 5530 3130 7930 10330 12730 GMT Time 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 (g/Kg)  T=10min;  z=75m 5km Height a.s.l. (m) 18:15 18:0510:25 01 October 02 October 03 October 02:1502:35 Stratospheric dry air intrusion associated with a of tropopause folding event PV-streamer event

25 730 5530 3130 7930 10330 12730 GMT Time 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 (%) Height a.s.l. (m) 18:15 18:0510:2502:1502:35  T=10min;  z=75m 5km 01 October 02 October 03 October

26 730 5530 3130 7930 10330 12730 PRELIMINARY DATA  T=1min  z=30m Height a.s.l. (m) GMT Time 1 October 2005 – water vapour mixing ratio (g/kg) 17:4821:36 01:1204:4908:26 Stratospheric dry air intrusion associated with a of tropopause folding event

27 730 5530 3130 7930 10330 12730 PRELIMINARY DATA  T=5min  z=300m Height a.s.l. (m) GMT Time 1 October 2005 – Temperature °K 17:4821:36 01:1204:4908:26 TO BE CORRECTED FOR PILE_UP Same trend on the temperature and humidity map The dry layer tongue is associated with lower temperatues Stratospheric dry air intrusion associated with a of tropopause folding event

28 730 5530 3130 7930 10330 12730 GMT Time 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) PRELIMINARY DATA  T=3min  z=120m Height a.s.l. (m) 8:38 17:13 16:24 00:5500:12 FOG

29 16:1219:2422:17 730 3130 1930 4330 5530 6730 GMT Time Wave structures underlieing thick clouds and appearing to be associated with the approachig of the cloud system 12 September 2005 – Water Vapour mixing ratio 14:52 (g/Kg) PRELIMINARY DATA  T=1min  z=30m 12 Oct,10:30-12 Oct, 22:20 GMT waves THICK CLOUDS

30 730 5530 3130 7930 10330 12730 GMT Time 19-20 October 2005 – Water Vapour mixing ratio (g/Kg) PRELIMINARY DATA  T=3min  z=120m Height a.s.l. (m) 21:00 03:4414:17 10:28 STRONG CONVECTIVE ACTIVITY

31 23:3603:5406:40 GMT Time Cloud formation possibly associated with the propagation of a gravity wave 27-28 September 2005 – Water Vapour mixing ratio 14:5719:15 (g/Kg) PRELIMINARY DATA  T=1min  z=30m 730 5530 3130 7930 10330 12730 27 Sept,14:55-28 Set, 18:15 GMT CLOUDS wave

32 23:3603:5406:40 GMT Time 14:5719:15 PRELIMINARY DATA  T=1min  z=30m 730 5530 3130 7930 10330 12730 Cloud formation possibly associated with the propagation of a gravity wave 27-28 September 2005– Particle backscattering at 355 nm (m -1 sr -1 ) CLOUDS wave

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

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