ICLAS: International Coordination-group on Laser Atmospheric Studies
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LIDAR RESEARCHER: Dr. Xinzhao Chu, Dr. Martin J. Jarvis

RESEARCH ASSOCIATES: Dr. Chester S. Gardner, Dr. Patrick J. Espy, Dr. Mark A. Clilverd

MAILING ADDRESS: University of Illinois, 1308 West Main Street, Urbana, IL 61801

TELEPHONE NUMBER: 217-333-3172

FAX NUMBER: 217-333-4303

E-MAIL ADDRESS: xchu@uiuc.edu

WEB SITE: http://eosl.csl.uiuc.edu/

DATE: November 2, 2003

LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.): Rothera, Antarctica (67.5 ° S, 68.0 ° W)


PARAMETER(S) OR CONSTITUENT(S) MEASURED: Thermal structure (30-115 km), polar mesospheric clouds, mesospheric Fe layer, and gravity waves

RESEARCH OBJECTIVES: Middle atmosphere thermal structure, characteristics and geographic differences of polar mesospheric clouds, atmospheric dynamics, and mesospheric Fe chemistry

SPONSOR: British Antarctic Survey (BAS) and NSF

MEASUREMENT TECHNIQUE: Fe Boltzmann temperature lidar based on a twin injection-seeded solid-state Alexandrite lasers



FREQ. OF MEASUREMENT (TYPICALLY): daily routine observations, year round, weather permits

MEASUREMENT TIMES (TYPICALLY): 2.5-5 minutes integration time for each profile, both daytime and nighttime observations

LASER TYPE AND WAVELENGTH (s): Twin injection-seeded frequency-doubled Alexandrite lasers (Light Age PAL 101) working at 372.099 nm and 373.819 nm. The injection seeder lasers are two external cavity diode lasers (EOSI 2010) working at fundamental wavelengths of 744.1990 nm and 747.6390 nm.

LASER ENERGY/PULSE: 100 mJ per pulse


RECEIVER SIZE AND CONFIGURATION: 40.6-cm diameter, Schmidt-Cassegrain telescope


SIGNAL PROCESSING: photon counting

ANALOG-To-DIGITAL CONVERTER: Phillips Scientific 300 MHz discriminator and SR430 multichannel scaler


PLATFORM (if applicable):

PUBLICATIONS (5 recent and/or significant):

Chu, X., W. Pan, G. Papen, C. S. Gardner, G. Swenson, and P. Jenniskens, Characteristics of Fe ablation trails observed during the 1998 Leonid meteor shower, Geophys. Res. Lett., 27, 1807-1810, 2000.

Gardner, C. S., G. C. Papen, X. Chu, and W. Pan, First lidar observations of middle atmosphere temperatures, Fe densities, and polar mesospheric clouds over the North and South Poles, Geophys. Res. Lett., 28 , 1199-1202, 2001.

Chu, X., W. Pan, G. C. Papen, C. S. Gardner, and J. A. Gelbwachs, Fe Boltzmann temperature lidar: design, error analysis, and initial results at the North and South Poles, Appl. Opt., 41, 4400-4410, 2002.

Pan, W., C. S. Gardner, and R. G. Roble, The temperature structure of the winter atmosphere at South Pole, Geophys. Res. Lett., 29, 10.1029/2002GL015288, 2002.

Chu, X., C. S. Gardner, and R. G. Roble, Lidar studies of interannual, seasonal, and diurnal variations of polar mesospheric clouds at the South Pole, J. Geophys. Res., 108 (D8), 8447, doi:10.1029/2002JD002524, 2003.

Pan, W., and C. S. Gardner, Seasonal variations of the atmospheric temperature structure from 3 to 110 km at South Pole, J. Geophys. Res., 108 (D18), 4564, doi: 10.1029/2002JD003217, 2003.

Chu, X., G. J. Nott, P. J. Espy, C. S. Gardner, J. C. Diettrich, M. A. Clilverd, and M. J. Jarvis, Lidar observations of polar mesospheric clouds at Rothera, Antarctica (67.5 ° S, 68.0 ° W), Geophys. Res. Lett. , in press, 2003.

COMMENTS: The UIUC Fe Boltzmann temperature lidar was formerly deployed on the NSF/NCAR Electra aircraft and observed Leonid meteor trails over Okinawa during the 1998 Leonid meteor shower Airborne Multi-instrument Campaign sponsored by NASA. In June and July 1999, this Fe lidar was again deployed on the NSF/NCAR Electra aircraft and made observations over the north polar cap during the Arctic Mesopause Temperature Study campaign sponsored by NSF. In November 1999, the Fe Boltzmann temperature lidar was installed at the Amundsen-Scott South Pole Station and then made two-year ground-based observations at the South Pole, sponsored by NSF. The current lidar observation at Rothera is sponsored by the British Antarctic Survey.



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