Mobile Aerosol Raman Lidar STAR kick-off DeBilt, 15.4.04 MARL at Paramaribo Franz Immler, Otto...
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Transcript of Mobile Aerosol Raman Lidar STAR kick-off DeBilt, 15.4.04 MARL at Paramaribo Franz Immler, Otto...
Mobile Aerosol Raman Lidar
STAR kick-off DeBilt, 15.4.04
MARL at ParamariboFranz Immler, Otto SchremsAlfred-Wegener-Insitut, Bremerhaven, Germany
mobile NDSC Instrument
Mobile Aerosol Raman Lidar
Pulsed Laser
The MARL cloud observatory
LidarSupplies and Elektronics
Detektion
1.1 m Cassegrain telescope
Continuum 9030, Nd:YAG300 mJ 532,355nm 30 Hz
air conditioned container, with automated hatch, rain sensor etc.
10 channel detection:532 nm II L355 nm II LII far and near field1064 nm387 nm N2 Raman607 nm N2 Raman407 nm H2O Raman
Mobile Aerosol Raman Lidar
Laser start upopen hatchadjust PMT voltagestart measurementcontrol system statusstop measurement
Pulsed Laser
The MARL cloud observatory
LidarSupplies and Elektronics
Detektion
TSI
Total sky imager
internetControl PC
Cloud camera
Mobile Aerosol Raman Lidar
Lidar Signals
355 nm (elastic backscatter)
387 nm (inelastic (Raman scattering at
N2 molecules)
407 nm (inelastic (Raman scattering at
H2O molecules)
geometric compression
Mobile Aerosol Raman Lidar
Lidar measurement
Mie(r) 0.5 km<r<25-45 km
Mie(r)
Mie(r), gc<r < 8-18 km
Mie(r),
Radiosonde required gc = 3.5 km
Water vapor mixing ratio rel. humidity
0.5 km < r< 8-10 km, Night time
nmnm
C355532log
log 355532
color index cloud height
lidar ratio ()
Angstrom coeff optical depth
microphysical characterizationof particles (aerosol/cloud type)
Mobile Aerosol Raman Lidar
MARL science
Aerosol (Saharan dust, biomass burning)Tropical cirrusCirrus and contrailsWater vapor
Mobile Aerosol Raman Lidar
Contrails: The cloud camera
Visual characterization of cirrus and contrails
Mobile Aerosol Raman Lidar
Paramaribo: Pilot study
Punta Arenas Apr/May 2000
Prestwick, Sept/ Oct 2000
ANT XVII/4, May/June 2000
ANT XXI/1, Oct / Nov 2003
Lindenberg, April-Oct. 2003
Mobile Aerosol Raman Lidar
Requirements at the site
Save place for two 20-feet containers MARL (AWI 002) + accompanying container (AWI 011)
-spare parts-tools-additional PCs
• data storage • online data evaluation• internet router
-office space-work shop
solid ground (supporting a 10 t container) guarded
Mobile Aerosol Raman Lidar
Requirements at the site
The power supply German (Dutch?) standard 3phase high current supply:
- 5-line cable: 3Phase+Neutral+Ground (no triangle connection) - 230 V, 400 V P-P, - 32A, 50Hz, 15kW
another line (5 kW) for AWI 011 stability of the net? UPS?
Mobile Aerosol Raman Lidar
Requirements at the site
Other Infrastructure Access to
-Internet-Telephone-Fax
indoor space (not compulsory when AWI 011 is available)
Mobile Aerosol Raman Lidar
Things to discuss: infrastructure
container site- Distance to power supply - container side by side? - preparation of the ground
stability of power supply internet access:
-one fixed IP address-LAN (10 - 100 Mbit?) -and/or ISDN
Access to site: day and night ? - Possibility to sleep over - Food supply?
Accommodation?Transportation (rental car? bycicle?)
Mobile Aerosol Raman Lidar
Things to discuss: contribute to WP5
Student practica, working with the instrumentlecture at ADeK
Mobile Aerosol Raman Lidar
Things to discuss: authorities
customs- formalities-dead lines-fees-limitations (time period)
permission for laser (air control, military ?) declaration of dangerous goods
- small amounts of acetone, methanol, cooling agents, N2
-- available on site?
costs-infrastructure (internet, electricity, etc.)
Mobile Aerosol Raman Lidar
Things to discuss: schedule
MARL available from 7/04 to 12/04 campaign in dry period Sept - Nov 04 desirable to have radiosondes, in particular water vapor (snow
white. persons involved
-setup: Ingo Beninga, Wilfried Ruhe (partly engaged from Oct-Feb), Franz Immler
-measurement: David Kaiser, Franz Immler, IB, WR
-SETUP:-Campaign: