Experimental investigation of ozone accumulation overnight during a wintertime ozone episode in south Taiwan

Lin, Ching Ho; Wu, Yung‐Fu; Lai, Chin-Hsing; Lin, Peihua; Lai, Hsin-Chih; Lin, Pay Liam

doi:10.1016/j.atmosenv.2004.05.003

Cited by 33 publications

(22 citation statements)

References 18 publications

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“…21 Similarly, 40% of total ground-level O 3 was attributed to transported O 3 in Taiwan. 15 A significant component of ground-level O 3 in New England is thought to be of remote origin as well, with baseline concentrations 36 Mid-Atlantic (United States) 600-1200 July 12, 1995 to July 15, 1995 Aircraft 0.06-0.10 0.10 Zhang et al 7 New York (United States) 500-1000 July 12, 1995 to July 16, 1995 Aircraft 0.08-0.10 0.10 Baumann et al 27 Tennessee c Averaging times for mobile measurements (aircraft, ozonesonde) were on the order of seconds; fixed measurement averaging times ranged from 30 min (Dayan and Levy 29 ) to 1 hr (Kastner-Klein et al, 9 Williams et al 42 ). No averaging time was listed for Heidam et al 17 representative of transport.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The Impact of Background Ozone on Compliance with Revised National Ambient Air Quality Standards

Williams

Potter

Clarkson

et al. 2009

Journal of the Air & Waste Management Association

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Section: Discussionmentioning

confidence: 99%

“…14 A study in Taiwan measured background O 3 concentrations between 0.078 and 0.086 ppm in a layer between 600 and 900 m above ground level. 15 In Spain, the nocturnal (background) O 3 concentration varied between 0.06 and 0.08 ppm. 16 Likewise, O 3 is not limited to populated, industrialized areas.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Background Ozone on Compliance with Revised National Ambient Air Quality Standards

Williams

Potter

Clarkson

et al. 2009

Journal of the Air & Waste Management Association

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“…High solar radiation and air temperatures, low cloud cover giving clear sky conditions as well as a stable atmosphere are the main meteorological factors conducive to ozone formation in Hong Kong (Lee et al 2002) as in other parts of the world. Among the meteorological factors, solar radiation and air temperature have been found to correlate strongly with ozone concentrations on a day-today basis (Lin et al 2004;Tu et al 2007). Urban ozone concentrations are enhanced by increases in ambient temperature which accelerate the conversion rates in the atmospheric chemistry.…”

Section: Photochemical Pollution In Hong Kongmentioning

confidence: 99%

“…Air temperature and ozone formation Meteorological conditions are known to influence ozone by affecting the photochemical environment, atmospheric circulation, and biogenic emissions of hydrocarbons (Lin et al 2004). High solar radiation and air temperatures, low cloud cover giving clear sky conditions as well as a stable atmosphere are the main meteorological factors conducive to ozone formation in Hong Kong (Lee et al 2002) as in other parts of the world.…”

Section: Photochemical Pollution In Hong Kongmentioning

confidence: 99%

The emergence of urban ozone episodes in autumn and air temperature rise in Hong Kong

Lee

Wenig

Yang

2009

Air Qual Atmos Health

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“…These back air trajectories were calculated from interpolated wind fields (Fig. 6a), using a method that was described in detail in our previous work (Lin and Chang, 2002;Lin et al, 2004). Banta et al (1998) employed a similar approach to analyze the city plume transport in Nashville, Tennessee.…”

Section: Daily Evolution Of Ozone Reservoir Layersmentioning

confidence: 99%

Ozone reservoir layers in a coastal environment – a case study in southern Taiwan

Lin

Lai

2010

Atmos. Chem. Phys.

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Abstract. The air layer between the nocturnal boundary layer and the top of the daily mixing layer in an ozonepolluted area is known to serve as an ozone reservoir since the ozone that is produced in the mixing layer on the preceding day is effectively preserved throughout the night in the air layer. Ozone reservoir layers existing at night can enhance the accumulation of surface ozone on the following day. However, our knowledge of the characteristics of ozone reservoir layers and their effects on the daily ozone accumulations is limited. In this work, ozone reservoir layers were experimentally investigated at a coastal, near-mountain site in southern Taiwan, 30 km away from the coastline. Tethered ozone soundings were performed to obtain vertical profiles of ozone and meteorological variables during a four-day ozone episode in November 2006. Observation-based methods are adopted to evaluate the effects of the ozone reservoir layers on the surface ozone accumulation during the fourday ozone episode. Ozone reservoir layers were found to develop every evening with a depth of 1200-1400 m. Ozone concentrations within the reservoir layers reached over 140 parts per billion (ppb). From each evening to midnight, the size of the ozone reservoir layer and the ozone concentration inside dramatically changed. As a result, a concentrated, elevated ozone reservoir layer formed with a depth of 400 m at 800-1200 m every midnight. For the rest of each night, the elevated ozone reservoir layer gradually descended until it reached 500-900 m in the next morning. The observed ozone reservoir layer is formed by the invasion of a cool, marine air mass into a relatively warm, ozone-rich mixing layer in the evening. The descending is related to nocturnal coastalCorrespondence to: C.-H. Lin (chlin@mail.fy.edu.tw) subsidence as well. The ozone concentration at the study site was maximal at 15:00-17:00 LT daily because of the addition of the daily produced ozone on the preceding day. The rate of increase of surface ozone concentration due to the downward mixing of the ozone in the ozone reservoir layers can be as high as 12-24 ppb/h in the late morning. The contribution of the ozone carried over from the preceding day can be 60-85 ppb, which contributes over 50% to the daily ozone pollution as compared with ozone produced on the study day.

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Experimental investigation of ozone accumulation overnight during a wintertime ozone episode in south Taiwan

Cited by 33 publications

References 18 publications

The Impact of Background Ozone on Compliance with Revised National Ambient Air Quality Standards

The Impact of Background Ozone on Compliance with Revised National Ambient Air Quality Standards

The emergence of urban ozone episodes in autumn and air temperature rise in Hong Kong

Ozone reservoir layers in a coastal environment – a case study in southern Taiwan

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