measured parameters: particle backscatter at 355 and 532 nm, particle extinction at 355 nm,
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
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
3rd COPS & GOP Workshop, 10/11 April
SEA-TAINER WITH SIZE THAT ALSO ALLOW EASY TRANSPORTATION ON ROAD
DETECTORS: photomultipliersPhotocathode = BialkaliQuantum efficiency @ 355 nm= 20 %Gain = 2x106
ACQUISITION: photon counting modeMinimum dwell time 100 nsBandwidth 125 MHz
RECEIVING SYSTEM: Newtonian telescope
Primary mirror diameter 0.4 mCombined focal length 1.8 mField of view 0.5 mrad
LASER: Nd:YAG laser (Quanta Systems – SYL 202)
Max. Pulse Energy@ 355nm 250 mJMaximum repetition rate 20HzBeam divergence 0.5 mradPulse duration 5 ÷ 6 ns
SPECTRAL SELECTION: based on Interference Filters
Wavelength (nm) 532 355 387 407 354.1-5 352.5-353.5Bandwidth (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 N2 H2O T(LoJ) T(HiJ)
BASIL
3rd COPS & GOP Workshop, 10/11 April
Optimized for both night-time and day-time operation
Vertical pointing capability only
BASIL Measurement precision
0
500
1000
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3500
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4500
5000
5500
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0 10 20 30 40
Random Error (%)
Hei
ght (
m)
night day
DIFA-Univ. Basilicata
• day <5% up to 2 km• night <2% up to 2 km, <20% up to 6km
Water Vapor Mixing Ratio
0
3000
6000
9000
12000
15000
1E-3 0.01 0.1 1 10
LIDARz=60 m up to 8 kmz=300 m above 8 km
8 September 2004
DIFA-Univ. Basilicata
Water vapour mixing ratio (g/kg)
Hei
ght (
m)
Lidar (20:49-21:19 GMT) Sonde (20:49 GMT)5 minute
150 meters
t=5 min, z=150 meters
Up to 13 km with 30 min time integration3rd 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
0
2
4
6
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38
160 180 200 220 240 260 280 300 320 -4 -2 0 2 4
09-Sep-04
(a)
Temperature (K)
Hei
ght (
km)
Sonde (22:00) Lidar
(0-26 km, 21:30-23:00) (26-36 km, 18:33-03:03)
T
(b)
BASIL
Up to 26 km with 1h30 min time integrationUp to 36 km with ≈ 8h min time integration
3rd COPS & GOP Workshop, 10/11 April
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
0 10 20
Random Error (K)
Hei
ght (
m)
night day
t = 5 minutez = 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)
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
Hei
gh
t a.
s.l.
(m
)
3rd COPS & GOP Workshop, 10/11 April
GMT Time
(g/Kg)
11
10
9
5
4
3
2
6
8
7
12
22:13 00:33 02:5517:32 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
Hei
gh
t a.
s.l.
(m
)
3rd COPS & GOP Workshop, 10/11 April
(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
Hei
gh
t a.
s.l.
(m
)
3rd 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
11
10
9
5
4
3
2
6
8
7
12
22:13 00:33 02:5517:32 19:52
T = 1 min, z = 300 m
Hei
gh
t a.
s.l.
(m
)
Lidar ratio 20-25 sr Typical for cirrus clouds & altostratus
Lidar ratio 40-80 sr Typical for aerosols in PBL
(K)
GMT TimeGMT Time
11
10
9
5
4
3
2
6
8
7
22:13 00:33 02:5517:32 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
Hei
gh
t a.
s.l.
(m
)
3rd COPS & GOP Workshop, 10/11 April
GMT TimeGMT Time
11
10
9
5
4
3
2
6
8
7
12
22:13 00:33 02:5517:32 19:52
Hei
gh
t 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
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)
Hei
gh
t a.
s.l.
(m
)
18:1518:05 10:25 02:1502:35
T=10min; z=75m <5km 150m >5km
01 October02 October
03 October
Log Scale
Dry stratospheric intrusion episode associated with a of tropopause folding event
3rd COPS & GOP Workshop, 10/11 April
730
5530
3130
7930
10330
12730
Hei
gh
t a.
s.l.
(m
)
UT Time
1-2 October 2005 – Water Vapour mixing ratio (g/kg)
18:05 21:40 01:15 04:50 08:25
Log Scale
3rd COPS & GOP Workshop, 10/11 April
730
5530
3130
7930
10330
12730
Hei
gh
t a.
s.l.
(m
)
UT Time
1-2 October 2005 – Atmospheric temperature (K)
18:05 21:40 01:15 04:50 08:25
3rd COPS & GOP Workshop, 10/11 April
730
5530
3130
7930
10330
12730
Hei
gh
t a.
s.l.
(m
)
UT Time
1-2 October 2005 – Relative humidity (%)
18:05 21:40 01:15 04:50 08:25
Log Scale
3rd COPS & GOP Workshop, 10/11 April
2000
4000
6000
8000
10000
0.1 1 10
Water vapour mixing ratio (g/kg)
Hei
ght (
m)
Sonde 01 Oct 05, 23:51 Lidar 10 min z = 30m
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.
3rd COPS & GOP Workshop, 10/11 April
BACK-UP SLIDES
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)
Hei
gh
t a.
s.l.
(m
)
09:2517:55 04:15 14:5522:55
T=10min; z=75m <5km 150m >5km
11 October 12 October
13:35
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)
Hei
gh
t a.
s.l.
(m
)
09:2517:55 04:15 14:5522:55
T=10min; z=75m <5km 150m >5km
11 October 12 October
13:35
Log Scale
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 (%)
Hei
gh
t a.
s.l.
(m
)
09:2517:55 04:15 14:5522:55
T=10min; z=75m <5km 150m >5km
11 October 12 October
13:35
Log Scale
0
2000
4000
6000
0.1 1 10
water vapour mixing ratio (g/kg)
Hei
ght (
m)
Sonde 23_55 11Oct05 Lidar 10 min z = 30m
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
200 220 240 260 280 300
Temperature (K)
Hei
ght (
m)
Temperature Sonde 23:55 11 Oct 05 Lidar 10 min z = 300m
WATER VAPOUR MIXING RATIO TEMPERATURE
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)
Hei
gh
t a.
s.l.
(m
)
17:55 04:15 14:5522:55
T=10min; z=600 m
11 October 12 October
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)
Hei
gh
t a.
s.l.
(m
)
17:55 04:15 14:5522:55
T=10min; z=600 m
11 October 12 October
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 150m >5km
Hei
gh
t a.
s.l.
(m
)
18:1518:05 10:25
01 October02 October
03 October
02:1502:35
Stratospheric dry air intrusion associated with a of tropopause folding event
PV-streamer event
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 (%)
Hei
gh
t a.
s.l.
(m
)
18:1518:05 10:25 02:1502:35
T=10min; z=75m <5km 150m >5km
01 October02 October
03 October
730
5530
3130
7930
10330
12730
PRELIMINARY DATAT=1min z=30m
Hei
gh
t a.
s.l.
(m
)
GMT Time
1 October 2005 – water vapour mixing ratio (g/kg)
17:48 21:36 01:12 04:49 08:26
Stratospheric dry air intrusion associated with a of tropopause folding event
730
5530
3130
7930
10330
12730
PRELIMINARY DATA
T=5min z=300m
Hei
gh
t a.
s.l.
(m
)
GMT Time
1 October 2005 – Temperature °K
17:48 21:36 01:12 04:49 08:26
TO BE CORRECTED
FOR PILE_UP
Same trend on the temperature and humidity mapThe dry layer tongue is associated with lower temperatues
Stratospheric dry air intrusion associated with a of tropopause folding event
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 DATAT=3min z=120m
Hei
gh
t a.
s.l.
(m
)
8:3817:13 16:2400:55 00:12
FOG
16:12 19:24 22:17
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 DATAT=1min z=30m 12 Oct,10:30-12 Oct, 22:20 GMT
waves
THICK CLOUDS
730
5530
3130
7930
10330
12730
GMT Time
19-20 October 2005 – Water Vapour mixing ratio (g/Kg)
PRELIMINARY DATAT=3min z=120m
Hei
gh
t a.
s.l.
(m
)
21:00 03:4414:17 10:28
STRONG CONVECTIVE ACTIVITY
STRONG CONVECTIVE ACTIVITY
23:36 03:54 06:40
GMT Time
Cloud formation possibly associated with the propagation of a gravity wave
27-28 September 2005 – Water Vapour mixing ratio
14:57 19:15
(g/Kg)
PRELIMINARY DATAT=1min z=30m
730
5530
3130
7930
10330
12730
27 Sept,14:55-28 Set, 18:15 GMT
CLOUDS
wave
23:36 03:54 06:40
GMT Time
14:57 19:15
PRELIMINARY DATAT=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
730
5530
3130
7930
10330
12730
PRELIMINARY DATAT=1min z=30m
Hei
gh
t 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