随着经济的快速发展，环境问题的日益严重，近年来西安市主城区近地面O3的

随着经济的快速发展，环境问题的日益严重，近年来西安市主城区近地面O3的浓度明显升高。本文主要针对西安市环境监测站2014年5月至2015年4月的数据对西安市主城区臭氧的浓度变化进行时间和空间上的分析以及对超标日臭氧的影响因素分析。结果表明：西安市2014年5月到2015年4月期间，西安市臭氧超标日主要集中在6-8月，其中臭氧共超标40天，6月超标13天，7月超标21天，8月超标6天，主要集中在夏秋两季。
臭氧的时间和空间上的变化较明显，根据臭氧分布季节变化得出臭氧浓度夏季>秋季>春季>冬季；根据月变化可知臭氧超标月为6、7、8月，臭氧浓度最大为7月，最小为1月，根据日变化可知一天之内白天浓度大于晚上浓度，浓度最高点大致出现在14:00-15:00；最小出现在7:00，空间上根据臭氧的年平均浓度可知臭氧分布为超级站>市体育场>高压开关厂>兴庆小区。
通过对比夏季臭氧超标样本日与非超标样本日各影响因素，分析臭氧污染成因得出：NOx与CO均为臭氧的前体物，与臭氧的形成有关但NOx与CO相比，NOx与臭氧的相关性较大。通过对比臭氧与颗粒物得出：超标日中O3随着颗粒物中PM2.5的上升而下降随着PM2.5的下降而上升。臭氧的浓度和气象条件密切相关。臭氧浓度随着温度的升高而升高，反之亦然；相对湿度：随着湿度的降低臭氧浓度上升，随着湿度的上升臭氧浓度下降；气压：温度升高时，气压降低，臭氧浓度升高，反之亦然；风速：风速大时，理论上应监测的臭氧浓度越大。

結果 (英文) 1:

With the rapid economic development, the increasingly serious environmental problems, main city of XI ' an, in recent years, near-ground concentrations of O3 increased significantly. This article XI May 2014 to April 2015 environmental monitoring station data of the main city of XI ' an city, ozone concentrations are time and space factors of analysis as well as the excessive effects of ozone. Results showed that: XI in May 2014 and April 2015, excessive ozone day is mainly concentrated in XI ' an city in June-August, total ozone over 40 days, in June over 13 days in July, exceeding 21 days, in August over 6 days, mainly in the summer and fall seasons.Ozone of time and space Shang of changes more obviously, according to ozone distribution season changes obtained ozone concentration summer > autumn > spring > winter; according to months changes known ozone exceeded months for 6、7、8yue, ozone concentration maximum for July, minimum for January, according to day changes known day within day concentration is greater than night concentration, concentration highest points roughly appeared in 14:00-15:00; minimum appeared in 7:00, space Shang according to ozone of average concentration known ozone distribution for Super station > Stadium > high voltage switch factory > Xingqing district.By comparing the summer ozone standard samples and the influencing factors of non standard samples, analysis of ozone pollution shows that NOx and CO are the precursors of ozone, NOx and CO associated with ozone formation than larger relationship between NOx and ozone. By contrast ozone and particulate matter that: overweight Japan O3 as particulate matter PM2.5 rise and decline with the fall and rise of PM2.5. The concentration of ozone and meteorological conditions. Ozone concentrations as the temperature increases, and vice versa, relative humidity: ozone concentration with decreasing humidity rises, with humidity rising ozone concentrations decreased air pressure: temperature rises, the less pressure, elevated ozone concentration, and vice versa, wind speed: wind speed when, in theory, should monitor the ozone concentration.

結果 (英文) 3:

With the rapid development of economy, the environmental problem is becoming more serious, and the concentration of O3 in the main city of Xi'an is obviously higher in recent years.. This paper mainly for Xi'an city environmental monitoring station may 2014 to 2015 April data of Xi'an City ozone concentration changes in time and space analysis and analysis of excessive influence factors of ozone. The results showed that the Xi'an City in May 2014 to 2015 during the month of April, Xi'an ozone exceeded, mainly concentrated in the 6-8 month, where ozone is exceeded 40 days and 6 months exceeded 13 days, July exceeding 21 days, August exceeded 6 days, mainly concentrated in summer and autumn.
Ozone time and space changes obviously. According to the distribution of ozone seasonal variation that ozone concentrations in summer > autumn > spring > winter; according to the monthly variation shows that excessive ozone month for 6, 7, 8 month, ozone concentration maximum for July, minimum in January, according to the more than diurnal variation shows a day day concentration levels in the evening, the highest concentration point generally appear at 14:00-15:00; minimum appears at 7:00, space according to the ozone annual average concentration of known ozone distribution for super station stadium in the city of > > High Voltage Switch Factory > Xingqing District. The cause of the ozone pollution is analyzed by comparing the daily and the non - standard sample of the ozone over the summer ozone.:NOx and CO are ozone precursors, but NOx and ozone are related to the formation of ozone, but the correlation between NOx and ozone is relatively large.. By comparing the ozone and particulate matter: the excessive days of O3 along with the rise of PM2.5 in the particulate matter and the rise of PM2.5. The concentration of ozone and the meteorological conditions were closely related. Ozone concentration increases with the increase of temperature, and vice versa; relative humidity: ozone concentration increased with the decrease of humidity, with the increase in humidity ozone concentration decreased; pressure: at elevated temperature, the pressure decreases, elevated ozone concentration, and vice versa; wind speed: wind speed, theory should monitoring ozone concentration is high.