RESEARCH ASSOCIATES: Helmut Giehl

MAILING ADDRESS: Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, Germany

TELEPHONE NUMBER: (+49)-8821-183-209

FAX NUMBER: (+49)-8821-73573

E-MAIL ADDRESS: trickl@ifu.fhg.de

WEB SITE: http://www.ifu.fhg.de

DATE: August 14, 2001

LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.): Garmisch-Partenkirchen, Germany, 47.5 N, 11.0 E

SITE ELEVATION: 730 m a.s.l.

PARAMETER(S) OR CONSTITUENT(S) MEASURED: Tropospheric ozone

RESEARCH OBJECTIVES AND SPONSOR: Investigation of ozone in the lower troposphere; sponsors: Deutsche Bundesstiftung Umwelt, European Union, Fraunhofer Society

MEASUREMENT TECHNIQUE: Mobile three-wavelength DIAL

MEASUREMENT RANGE: 0.2 to 4 km above ground

VERTICAL RESOLUTION: dynamically set, 0.05 to 0.3 km

FREQ. OF MEASUREMENT (TYPICALLY): 1 measurement per hour during selected episodes

MEASUREMENT TIMES (TYPICALLY): 10 min

LASER TYPE AND WAVELENGTH (s): Quadrupled Nd:YAG, Raman shifted in hydrogen and deuterium; 266 nm, 289 nm, 299 nm

LASER ENERGY/PULSE: 0.12 J (266 nm)

PULSE REPETITION RATE: 30 Hz

RECEIVER SIZE AND CONFIGURATION: 317 mm Newtonian telescope

DETECTORS USED: 4 Hamamatsu H5783P-06 PMTs

SIGNAL PROCESSING: 8 channels with 12 bit/20 MHz transient digitizers

ANALOG-T0-DIGITAL CONVERTER: 12 bit/20 MHz (Licel)

COMPUTER: PC

PLATFORM (if applicable): truck

PUBLICATIONS (5 recent and/or significant):

P. Brenner, O. Reitebuch, K. Schäfer, T. Trickl, A. Stichternath, A Novel Mobile Vertical-sounding System for Ozone Studies in the Lower Troposphere, in: Advances in Atmospheric remote Sensing with Lidar, A. Ansmann et al., Eds., Springer (1997) 383-386

P. Seibert, H. Feldmann, B. Neininger, M. Bäumle, T. Trickl, South foehn and ozone in the East Alps - case study and climatological aspects, Atmos. Environ. 34 (2000) 1379-1394

T. Trickl, Transport Studies by Lidar Sounding - the IFU Activities in 2000, A contribu-tion to subproject TOR 2, EUROTRAC Annual Report 2000, published by GSF-For-schungszentrum (München, Germany), in press

COMMENTS: The accuracy of the ozone mixing ratio is about 3 ppb up to about 2.0 km and slightly worse above this. The lidar was damaged during the May-1999 inundations in the Loisach valley and is currently rebuilt.