HR: 0800h
AN: A51B-0339    [Abstracts]
TI: Ozone Profiles Over the Industrial Coast of Southern Taiwan
AU: * Lin, C
EM: chlin@mail.fy.edu.tw
AF: Fooyin University, 151 Chinhsueh Road, Ta-Liao, Kaohsiung, 831, Taiwan
AU: Lai, C
AF: Fooyin University, 151 Chinhsueh Road, Ta-Liao, Kaohsiung, 831, Taiwan
AU: Wu, Y
AF: National Cheng-Kung University, No. 1, University Road, Tainan, 701, Taiwan
AU: Lai, H
AF: National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 101, Taiwan
AU: Lin, P
AF: Chang Jung Christian University, 396 Chang Jung Rd., Sec.1, Kway Jen, Tainan, 711, Taiwan
AB: This study presents the variations of vertical ozone profiles measured in a field study conducted nearby a costal industrial park in southern Taiwan during October 21 to November 20, 2005. The ozone profiles were measured by tethered ECC ozonesones. In each experimental day, 6-10 times of tethered ozonesondes were launched both in the daytime and night. Totally, 136 ozone profiles are acquired. The results indicate that even in the daytime the vertical ozone distributions were far from uniform. The ozone concentrations in the range of 40-160 ppb may distribute at 0-1800 m. Due to the development of sea-breeze circulations and the development of thermal internal boundary layers (TIBL) in sea breezes, three distinct ozone layers were detected, the layer in the TIBL, the layer overlaid the TIBL and under the return sea breeze, and the return sea-breeze layer. The ozone concentration in a TIBL is relatively lower than the other two layers due to the titration of fresh NO emission from surface sources. Ozone in a return sea-breeze layer is relatively higher than the other two layers possibly due to the transport of inland ozone-rich air by the return sea breeze. In the nighttime, elevated ozone-depleted layers with nearly zero ozone were detected to distribute among ozone residual layers with ozone concentrations in the range of 60-120 ppb. The elevated ozone-depleted layers are formed likely by the NO plumes from the nearby industrial park.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0350 Pressure, density, and temperature
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting