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


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


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


Lidar Signals

355 nm (elastic backscatter)

387 nm (inelastic (Raman scattering at

N2 molecules)

407 nm (inelastic (Raman scattering at

H2O molecules)

geometric compression


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)


MARL science

Aerosol (Saharan dust, biomass burning)Tropical cirrusCirrus and contrailsWater vapor


Aerosol: Saharan dust


Saharan dust. June 3 2000 12°N


Aerosol: characterization ANT XXI/1


Tropical cirrus

9°S 7°S 5°S 3°S

W

E

E


Tropical cirrus: ultra thin


clouds:Total sky imager


Contrails: The cloud camera

Visual characterization of cirrus and contrails


Contrails


Water vapor by Raman scattering

ANT XXI / 1

2003


Water vapor by Raman scattering


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


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



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?



Other Infrastructure Access to

-Internet-Telephone-Fax

indoor space (not compulsory when AWI 011 is available)


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?)


Things to discuss: contribute to WP5

Student practica, working with the instrumentlecture at ADeK


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.)


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:

mobile aerosol raman lidar star kick-off debilt, 15.4.04 marl at paramaribo franz immler, otto...

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