HR: 0800h
AN: A11B-0041    [Abstracts]
TI: Comparison of Ozone Measurements From a Tethered Balloon Sampling Platform at South Pole Station in December, 2003
AU: * Johnson, B J
EM: bryan.johnson@noaa.gov
AF: National Oceanic and Atmospheric Administration, 325 Broadway, R/CMDL1, Boulder, CO 80305-3328 United States
AU: Oltmans, S J
EM: samuel.j.oltmans@noaa.gov
AF: National Oceanic and Atmospheric Administration, 325 Broadway, R/CMDL1, Boulder, CO 80305-3328 United States
AU: Helmig, D
EM: detlev.helmig@colorado.edu
AF: Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309-0450 United States
AB: Ozone was measured from a tethered balloon platform during the 2003/2004 Antarctic Tropospheric Chemistry Investigation (ANTCI) at South Pole, Antarctica. Electrochemical concentration cell (ECC) ozonesondes were used during the 52 ascent/descent profile measurements from December 13-30, 2003. Five of the measurements used dual ECC ozonesondes. Quality data checks were done before and after each tether run by comparing to a surface ozone ultra-violet absorption (UV) monitor located next to the tether balloon site at 2 meters above ground level. During the 18 day period, ozonesonde spot measurement checks at the surface agreed to within 3 percent of the continuous ozone measurements under ambient concentrations ranging from 19 to 51 ppbv. This agreement was also consistent when compared to the nearby NOAA Climate Monitoring and Diagnostics Lab (CMDL) UV instrument sampling at 17 meters above ground level. However, during a 5-day period of stable conditions with relatively high surface ozone (near 45 ppbv), the 17 meter location measured 2 to 3 ppbv lower ozone than the 2 meter site due to the steep vertical gradient in ambient ozone. The ECC sonde and UV monitor agreement was also consistent during several vertical profiles up to 100 meters when the surface ozone monitor was connected to a long Teflon sampling tube attached to the tether platform.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0365 Troposphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting