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首页> 外文期刊>Journal of the air & waste management association >Trends in Concentration of Ground-Level Ozone and Meteorological Conditions during High Ozone Episodes in the Kao-Ping Airshed, Taiwan
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Trends in Concentration of Ground-Level Ozone and Meteorological Conditions during High Ozone Episodes in the Kao-Ping Airshed, Taiwan

机译：台湾高平气域高臭氧发生期间地面臭氧浓度和气象条件的变化趋势

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摘要

This work analyzes the variations in daily maximum 1-hr ozone (O_3) concentrations and the long-term trends in annual means of hourly ambient concentrations of O_3, nitrogen oxides (nitrous oxide + nitrogen dioxide), and nonmethane hydrocarbons in the three administrative regions of Kao-Ping airshed in southern Taiwan over a recent 8-yr period. The annual or monthly means of all maxima, most 95th percentiles, and some 90th percen-tiles of the daily maximum 1-hr O_3 concentrations exceed the daily limit of 120 parts per billion by volume in all three regions, namely, Kao-hsiung City, Kso-hsiung County, and P'ing-tung County. The monthly means of daily maximum 1-hr O_3 concentrations exhibit distinct seasonal variations, with a bimodal form with the maxima in autumn and late winter to the middle of spring and a minimum in summer. The long-term variations in the annual means of hourly O_3 concentrations in the three regions exhibit increasing trends. These increases in O_3 are associated with the decline in ambient concentrations of nitrogen oxides and nonmethane hydrocarbons. High O_3 episodes occur most often in autumn and most rarely in summer. The seasonal mean mixing heights in descending order follow the order of spring, summer, autumn, and winter. Meteorological parameters in autumn and winter indicate that the ground-level O_3 tends to accumulate and trigger a high O_3 episode on a warm day with sufficient sunlight and low wind in a high-pressure system, consistent with the low mixing heights in these two seasons.
机译：这项工作分析了三个行政区域内每日最高一小时臭氧（O_3）浓度的变化以及每小时平均O_3，氮氧化物（一氧化二氮+二氧化氮）和非甲烷碳氢化合物的每小时平均浓度的长期趋势最近8年内，台湾南部的高平航空空袭。在全部三个地区，即高雄市，每日最大1小时O_3浓度的所有最大值，最多95个百分位数和大约90个百分位数的年均值或月均均值超过了百万分之120的每日限值，草雄县和屏东县。每日最高1小时O_3浓度的月平均值显示出明显的季节性变化，双峰形式的最大值在秋季和冬季末到春季中旬，在夏季最低。三个地区每小时O_3浓度年均值的长期变化呈现出上升趋势。 O_3的这些增加与周围氮氧化物和非甲烷碳氢化合物浓度的下降有关。 O_3高发发作最常发生在秋季，最罕见的发生在夏季。季节性平均混合高度从高到低依次为春季，夏季，秋季和冬季。秋季和冬季的气象参数表明，在高压天气下，在高压系统中有充足的阳光和低风的情况下，地面O_3倾向于积聚并触发高O_3事件，这与这两个季节的低混合高度一致。

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