Analysis of air pollution in two major Korean cities: trends, seasonal variations, daily 1-hour maximum versus other hour-based concentrations, and standard exceedances
Analysis of air pollution in two major Korean cities: trends, seasonal variations, daily 1-hour maximum versus other hour-based concentrations, and standard exceedances
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DOI：
10.1016/s0269-7491(99)00284-5
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发表时间：
2000-01-01
影响因子：
8.9
通讯作者：
Nam, CW
中科院分区：
文献类型：
--
作者：
Jo, WK;Yoon, IH;Nam, CW
本文研究了韩国两大城市，包括首都首尔的一氧化碳(CO)、二氧化氮(NO2)、臭氧(O-3)和二氧化硫(SO2)在7-8年的时间段内的特征。每日1小时最大浓度和其他以小时为基础的浓度的年平均值和百分位数的变化因大院和城市类型而异。季节变化根据大院的不同而不同，但与城市类型无关。与其他夏季月份相比，首尔和大邱7月份的O-3浓度都较低。在这两个城市，所有化合物的每日1小时和8小时最大或每日平均浓度之间存在高度的相关性，P<；0.0001的R-2为0.66-0.9。结果表明，对于CO和O-3，8h标准比1h标准严格，而对于NO2和SO2，1h标准比24h标准严格。随着两市NO2、O-3和SO2最大浓度的增大，日1h最大浓度与日平均浓度的相关系数减小。对于所有目标化合物，首尔记录的浓度高于相关1小时、8小时和24小时标准的天数比大邱高得多。(C)2000爱思唯尔科学有限公司。保留所有权利。
This study considers the characteristics of carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O-3) and sulfur dioxide (SO2) in two major South Korean cities, including the capital city of Seoul, over a time period of 7-8 years. Changes in the annual mean and percentiles of the daily 1-h maximum and other hour-based concentrations varied according to the compound and city type. Seasonal variations varied according to the compound,:yet not with the city type. Both Seoul and Taegu exhibited lower O-3 concentrations in July compared to other summer months. There was a high degree of correlation between the daily 1- and 8-h maximum or daily mean concentrations of all compounds in both cities, with an R-2 Of 0.66-0.90 at p < 0.0001. It was indicated that for CO and O-3, the 8-h standard was more stringent than the 1-h standard, while for NO2 and SO2, the 1-h standard was more stringent than the 24-h standard. The correlation coefficients between the daily 1-h maximum and daily mean concentrations decreased as the maximum concentration values of NO2, O-3, and SO2 increased in the two cities. For all the target compounds, Seoul recorded a substantially higher frequency of days with concentrations above the relevant 1-, 8-, and 24-h standards compared to Taegu. (C) 2000 Elsevier Science Ltd. All rights reserved.