LIDAR RESEARCHER: Professor Chiao-Yao She

RESEARCH ASSOCIATES: Professor David A. Krueger, Dr. Bifford P. Williams

MAILING ADDRESS: Physics Department, Colorado State University, 200 West Lake Street, Frot Collins, CO 80523

TELEPHONE NUMBER: 970-491-6261

FAX NUMBER: 970-491-7947

E-MAIL ADDRESS: joeshe@lamar.colostate.edu

WEB SITE: http://cedarweb.hao.ucar.edu/instr/csl.html

DATE: August 26, 2003

LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.):

Fort Collins, CO, U.S.A. (40.59N, 105.14W)

SITE ELEVATION: 1.57km

PARAMETER(S) OR CONSTITUENT(S) MEASURED:

Mesopause region sodium density

simultaneous measurement of temperature and horizontal (zonal and meridional) wind

24-hour continuous, weather permitting

RESEARCH OBJECTIVES:

long-term temperature changes in the mesopause region

atmospheric dynamics and tides in the mesopause region

SPONSOR: NSF

MEASUREMENT TECHNIQUE:

narrowband resonance backscatter and detection from sodium atoms

MEASUREMENT RANGE: 80 - 110 km

VERTICAL RESOLUTION: 150 meter

FREQ. OF MEASUREMENT (TYPICALLY): ~ 90 hours per week, year round

MEASUREMENT TIMES (TYPICALLY): 2 to 60-minute resolution, day or night

LASER TYPE (s): CW Yag pumped Coherent 899-21 ring dye laser as seed, Nd:YAG frequency-doubled pump source for a pulsed dye amplifier

WAVELENGTH: 589 nm

LASER ENERGY/PULSE: 20 mJ/pulse

PULSE REPETITION RATE: 50 Hz

RECEIVER SIZE AND CONFIGURATION: Twin 35-cm diameter, Celestron

DETECTORS USED: Twin PMT

SIGNAL PROCESSING: photon counting

ANALOG-T0-DIGITAL CONVERTER: Optech

COMPUTER: Two Pc's

PUBLICATIONS (5 recent and/or significant):

She, C. Y., Jim Sherman, Joe Vance, Titus Yuan, Zhilin Hu, B. P. Williams, Kam Arnold, Phil Acott, and David A. Krueger Evidence of solar cycle effect in the mesopause region: Observed temperatures in 1999 and 2000 at 98.5 km over Fort Collins, CO (41 o N, 105 o W), J. Atmo. Solar-Terr. Phys. 64, 1651-1657, 2002.

She, C. Y., and D. A. Krueger, Impact of natural variability in the 11-year mesopause region temperature observation over Fort Collins, CO (41N, 105W), Adv. Space Phys. (In press).

She, C. Y., Jim Sherman, Tao Yuan, B. P. Williams, Kam Arnold, T. D.Kawahara, Tao Li, LiFang Xu, J. D. Vance and David A. Krueger, The first 80-hour continuous lidar campaign for simultaneous observation of mesopause region temperature and wind, Geophys. Res. Lett.30, 10.1029/2002GL016412, 2003.

Arnold, K. S., and C. Y. She, Metal fluorescence lidar (light detection and ranging) and the middle atmosphere, Contemporary Physics, 44, 35-49, 2003.

She, C. Y., Jim Sherman, Tao Yuan, B. P. Williams, Kam Arnold, T. D.Kawahara, Tao Li, LiFang Xu, J. D. Vance and David A. Krueger, The first 80-hour continuous lidar campaign for simultaneous observation of mesopause region temperature and wind, Geophys. Res. Lett.30, 10.1029/2002GL016412, 2003.

COMMENTS: This lidar has been in routine nighttime operation since May 1991, and on 24-hour continuous basis, since April 2002.