CAJ | 학술논문

为了研究2008年北京奥运会前期污染物浓度变化特征,对北京气象塔3层高度上的大气污染物(NO_2和O_3)进行加强观测,分析其变化特征.观测结果表明,由于北京奥运会前期采取了严格的空气质量控制措施,NO_2浓度相对车辆限行前下降了45.3%,且随着高度递增逐渐降低;O_3浓度最大值和日均值有所降低,其最大值出现时间较10年前提前了1～2 h,且有4 h左右处于相对平稳状态.O_3浓度峰值主要是受NO_2的控制,O_3浓度蜂值出现时间提前反映出北京大气氧化效率不断提高.对于观测期间出现光化学污染事件,利用同期气象资料和大气污染监测数据分析,发现造成这次大气污染的主要原凶是气象因子:地而多处于弱高压场控制中,大气层结稳定,风力较弱(小于2 m/s),并伴随着连续高温、强辐射和低湿.
위료연구2008년북경오운회전기오염물농도변화특정,대북경기상탑3층고도상적대기오염물(NO_2화O_3)진행가강관측,분석기변화특정.관측결과표명,유우북경오운회전기채취료엄격적공기질량공제조시,NO_2농도상대차량한행전하강료45.3%,차수착고도체증축점강저;O_3농도최대치화일균치유소강저,기최대치출현시간교10년전제전료1～2 h,차유4 h좌우처우상대평은상태.O_3농도봉치주요시수NO_2적공제,O_3농도봉치출현시간제전반영출북경대기양화효솔불단제고.대우관측기간출현광화학오염사건,이용동기기상자료화대기오염감측수거분석,발현조성저차대기오염적주요원흉시기상인자:지이다처우약고압장공제중,대기층결은정,풍력교약(소우2 m/s),병반수착련속고온、강복사화저습.
In order to study atmospheric pollution concentration changes during the 2008 Olympic Games in Beijing, atmospheric pollutants( NO_2 and O_3) at 3 altitude levels of Beijing meteorological tower were observed, and their variations were analyzed. The results indicate that by the strict measures for improving the air quality before Olympic Games, NO_2 concentration reduced by 45. 3% and decreased gradually with the increasing height; both the maximum of O_3 concentrations and the daily average O_3 concentrations decreased. The appear-ance time of O_3 maximum concentration was brought forward about 1～2 h than 10 years ago, and kept stably a-round 4 h. The O_3 peak concentrations were mainly influenced by NO_2. The O_3 concentration peak appeared a-head of schedule,which showed that Beijing atmospheric oxidation efficiency continued to increase. According to the analysis meteorological data and atmospheric pollution monitoring data the meteorological factors for photo-chemical pollution event were found as follows: weak-rield control of high-voltage, stable atmospheric stratifica-tion, weaker wind force ( the wind velocity was less than 2 m/s) , and accompanied by a continuous high temper-ature, strong radiation and low humidity.