Surface Ozone in Jiuzhaigou National Park, Eastern Rim of the Qinghai-Tibet Plateau, China

Located in southwestern China, Jiuzhaigou National Park is one of the most popular tourism destinations in China, famous for its unique aquatic ecosystems and beautiful forests. However, plants in the park may be at high ozone risk as a result of the intensive use of diesel tour buses in the park. I...

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Bibliographic Details
Published in:Journal of mountain science 2012-10, Vol.9 (5), p.687-696
Main Authors: Qiao, Xue, Tang, Ya, Jaffe, Daniel, Chen, Pan, Xiao, Weiyang, Deng, Guiping
Format: Article
Language:English
Subjects:
Air quality
Anthropogenic factors
Atmospheric pollution
Atmospheric sciences
Diurnal variations
Earth and Environmental Science
Earth Sciences
Ecology
Ecosystems
Environment
Environmental impact
Geography
Growing season
Meteorology
Mountains
National parks
Nocturnal boundary layer
Ozone
Ozone concentration
Ozone deposition
Ozone in troposphere
Ozone measurements
Photochemistry
Pollution monitoring
Seasonal variability
Tourism
tours
Troposphere
中国西南部
九寨沟
国家公园
地面臭氧
旅游活动
水生生态系统
臭氧浓度
青藏高原
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Summary:Located in southwestern China, Jiuzhaigou National Park is one of the most popular tourism destinations in China, famous for its unique aquatic ecosystems and beautiful forests. However, plants in the park may be at high ozone risk as a result of the intensive use of diesel tour buses in the park. In addition, Jiuzhaigou is close to a region with relatively high regional anthropogenic NOn emissions. During the growing season, also the peak season of tourism, we measured ozone concentration at two sites within the Park and these were： Jiuzhaigou Bureau （JB） and Long Lake （LL）. The results indicate that ozone concentrations were not high enough to cause foliar injury during the monitoring period, although the risk of ozone to plants was higher in spring than in summer and autumn. Diurnal ozone cycles at JB and LL displayed significantly higher ozone concentrations in the daytime than in the nighttime, suggesting photochemical production of ozone during the day and ozone deposition during the night as a result of the nocturnal boundary layer. In parallel with the seasonal change of background surface ozone in the Northern Hemisphere, maximum daily 8-h average ozone concentration （MDA8） and daily ozone concentration decreased from spring to autumn at the two sites. This temporal variation in Jiuzhaigou wasmost likely associated with the downward mixing of ozone-rich air from the free troposphere, because all the high-ozone events （MDA8 〉 70.0 ppb） were observed in spring and ozone-rich air from the free troposphere was the dominant cause. In summary, our data suggest that ozone concentrations in Jiuzhaigou were more affected by the regional-scale of background pattern in air quality and meteorological conditions than by local tourist activities.
ISSN:1672-6316
1993-0321
1008-2786
DOI:10.1007/s11629-012-2449-8