HR: 1340h
AN: A33B-0896    [Abstracts]
TI: Evaluation of data from the Vaisala CT25K for Estimation of PM10 Concentration and Mixing Heights in an Urban Environment
AU: * Gunter, R L
EM: laureen.gunter@noaa.gov
AF: NOAA/OAR/ARL/ATDD, 456 S. Illinois Ave, Oak Ridge, TN 37830 United States
AU: Hosker, R P
EM: ray.hosker@noaa.gov
AF: NOAA/OAR/ARL/ATDD, 456 S. Illinois Ave, Oak Ridge, TN 37830 United States
AB: During the month of August, the Urban Dispersion Project was conducted in New York City. NOAA's Atmospheric and Turbulence Division (ATDD), Oak Ridge, TN operated a Vaisala CT25K Ceilometer for a two-week timeframe during the project. Typically, ceilometer measurements are used for cloud height determination. It has been found that during dry conditions, there is a good correlation between the ceilometer near- range backscatter and in situ PM10 concentration readings. In addition, it also has been determined that the ceilometer is a suitable instrument for determining the convective mixing height (MH). Aerosol concentrations are calculated and mixing heights are estimated using data from the ceilometer during dry conditions in Manhattan. Mixing heights are compared to radiosonde data taken during the project.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0325 Evolution of the atmosphere (1610, 8125)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005