西安市雁塔区10月O_3时空变化规律  

Vertical and temporal variation of O_3 in October in the Yanta District of Xi'an

作　　者：李凌霜 赵景波[1,2] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062 [2]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,西安710061

出　　处：《地球环境学报》2015年第5期299-306,共8页Journal of Earth Environment

基　　金：国家科技部科技支撑项目(2007BAC30B01)

摘　　要：根据2013年10月对西安市雁塔区84m高度范围的昼夜观测资料，研究了O3的日变化规律、垂直分布以及气象因素对其的影响。结果表明：O3浓度日变化规律较为明显，呈单峰型分布，早晨浓度开始上升，于14：30左右达到峰值，在16：30之后开始降低并趋于平稳，并且O3浓度昼夜变化可分为3个阶段，8：30—16：30为O，浓度最高阶段，18：30-00：30为O3浓度居中阶段，2：30-6：30为03浓度最低和降低阶段。垂直高度上O3浓度随高度上升而升高，并且O3浓度的垂直梯度变化分为低-中-高3个阶段，1～30m为O3浓度最低层段，36～66m为03浓度居中层段，70-84m为O3浓度最高层段。O3浓度与NOx浓度的日变化呈明显负相关，相关系数为-0．2l。O3浓度的变化曲线与温度垂向变化曲线相似，呈现出同升同降的特点，两者呈明显正相关，相关系数为0．72。O3浓度与湿度的日变化呈现出相反的趋势，两者呈现明显的负相关性，相关系数为-0．76。According to the range of 84 m day and night observation data in October 2013 in the Yanta District of southern Xi＇an City, this paper analysed the concentration of 03 daily variation regularity, the vertical distribution, and the influence of various factors. The results showed that the concentration of 03 variation was relatively obvious, the distribution type was unimodal and the concentration began to rise in the morning, arrived peak at 14：30 around and then leveled off. It also showed that the concentration of 03 daily variation could be divided into 3 phases： 03 concentration reached high level from 8：30 to 16：30, reached middle level from 18：30 to 00：30, reached low and reduced level from 2：30 to 6：30. In the vertical height, 03 concentration increased with altitude and from 8：30 to 14：30 was the largest stage of 03 concentration variation. It also showed that 03 concentration in the vertical height can be divided into 3 phases： 03 concentration reached lowest level from 1 m to 30 m, reached middle level from 36 m to 66 m, reached highest level from 70 m to 84 m. In the vertical height, 03 concentration increased with altitude and from 8：30 to 14：30 was the largest stage ofO3 concentration variation. The daily variation of 03 concentration and NOx concentration showed the opposite trend, and they had significantly negative correlation, the correlation coefficient was -0.21.03 concentration variation curves and temperaturevariation curves were similar, presented the trend of rise and fall at the same time, they had significant positive correlation, the correlation coefficient was 0.72. 03 concentration and the moisture daily variation presented a contrary trend, and they showed obvious negative correlation, the correlation coefficient was - 0.76

关 键 词：O3浓度 日变化 垂直分布 西安雁塔区 

分 类 号：X51[环境科学与工程—环境工程]