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 transcript:

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

DETECTORS: photomultipliers Photocathode = Bialkali Quantum 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 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) Bandwidth (nm) Out-of-band blocking CW Transmission (%) 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

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

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

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) September 2004 – Particle backscattering at 355 nm (m -1 sr -1 ) 17:32 19:  T = 1 min,  z = 30 m Height a.s.l. (m) 3 rd COPS & GOP Workshop, 10/11 April

GMT Time (g/Kg) :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) September 2004 – Water vapour mixing ratio Height a.s.l. (m) 3 rd COPS & GOP Workshop, 10/11 April

(m -1 ) 02:55 GMT Time :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

(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 :13 00:33 02:55 17:32 19:52  T = 1 min,  z = 300 m Height a.s.l. (m) Lidar ratio sr Typical for cirrus clouds & altostratus Lidar ratio sr Typical for aerosols in PBL

(K) GMT Time :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

GMT Time :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

GMT Time BASIL (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 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

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

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

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

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

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

BACK-UP SLIDES

GMT Time Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 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

GMT Time Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 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

GMT Time Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 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

WATER VAPOUR MIXING RATIO TEMPERATURE

GMT Time Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) October 2005 – Temperature (K) Height a.s.l. (m) 17:5504:1514:5522:55  T=10min;  z=600 m 11 October 12 October

GMT Time Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) October 2005 – Temperature error (K) Height a.s.l. (m) 17:5504:1514:5522:55  T=10min;  z=600 m 11 October 12 October

GMT Time Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 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

GMT Time Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 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

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

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

GMT Time Univ. of Basilicata Lidar (Lat: 40°38'45.23" N, Long: 15°48'29.32" E, Site elevation: 730 m) 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

16:1219:2422: 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

GMT Time 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

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

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

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