咸宁城区降水对PM_(2.5)和O_3的清除作用的初步分析
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摘要
为了研究咸宁城区降水对PM_(2.5)和O_3质量浓度的影响,采用清除效率与降水时间、降水量总量和降水前其质量浓度关系的方法分析咸宁城区2015年1月至2016年12月的211次降水数据,结果表明:降水对二者的清除效果随雨强、降水持续时间及降水总量增加而增加;当降水开始前PM_(2.5)、O_3质量浓度较低时,降水对其清除效果不理想,降水开始前二者浓度较高时,降水对其有明显的清除作用。结论:当降水量大于5.0 mm时,且降水过程前PM_(2.5)和O_3质量浓度大于65μg/m~3时,降水的清除效果随着降水量的增加而越明显。
To study the influence of rainfall on mass concentration of PM_(2.5) and O_3 in urban areas, we analyzed211 rainfall data from January 2015 to December 2016 in Xianning by analyzing the relation between scavenging efficiency and rainfall time, total rainfall amount and the mass concentration of PM_(2.5) and O_3 before rainfall. The results showed that the scavenging effect increased with the increase of rainfall intensity, time of duration and total amount, in case of lower mass concentration of PM_(2.5) and O_3 before rainfall, the scavenging effect was not so obvious; in case of higher mass concentration of PM_(2.5) and O_3 before rainfall, rainfall had obvious scavenging effect on them. In conclusion: when the rainfall amount is greater than 5.0 mm and the mass concentration of PM_(2.5) and O_3 are greater than 65 μg/m~3, the scavenging effect of rainfall is more obvious with the increase of rainfall amount.
To study the influence of rainfall on mass concentration of PM_(2.5) and O_3 in urban areas, we analyzed211 rainfall data from January 2015 to December 2016 in Xianning by analyzing the relation between scavenging efficiency and rainfall time, total rainfall amount and the mass concentration of PM_(2.5) and O_3 before rainfall. The results showed that the scavenging effect increased with the increase of rainfall intensity, time of duration and total amount, in case of lower mass concentration of PM_(2.5) and O_3 before rainfall, the scavenging effect was not so obvious; in case of higher mass concentration of PM_(2.5) and O_3 before rainfall, rainfall had obvious scavenging effect on them. In conclusion: when the rainfall amount is greater than 5.0 mm and the mass concentration of PM_(2.5) and O_3 are greater than 65 μg/m~3, the scavenging effect of rainfall is more obvious with the increase of rainfall amount.
引文
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[2]周登,张帆,吴涛涛,等.冬季霾天气下武汉城区大气PM2.5的化学特征[J].湖北农业科学,2014,53(21):5009-5115.
[3]王俊秀,安俊琳,邵平,等.南京北郊大气臭氧周末效应特征分分[J].环境科学,2017,38(6):2256-2263.
[4]林旭,朱彬,安俊琳,等.南京北郊VOCs对臭氧和二次有机气溶胶潜在贡献的研究[J].中国环境科学,2015,35(4):976-986.
[5]李莹,朱凌云,张逢生,等.山西省夏季近地面O3体积分数变化特征及影响因素[J].干旱气象,2017,35(3):398-404.
[6]王俊秀,安俊琳,邵平,等.南京北郊大气臭氧周末效应特征分析[J].环境科学.2017,38(6):2256-2263.
[7]段莹,吴战平,张东海,等.贵阳市降水对PM2.5污染物湿清除作用[J].气象科技,2016,44(3):458-462.
[8]李德俊,熊守权,柳草,等.降水对武汉2次空气污染过程的湿清除特征[J].中国农学通报,2017,33(29):95-102.
[9]周彬,刘端阳,魏建苏,等.降水对气溶胶颗粒物清除作用的初步分析[J].长江流域资源与环境,2015(24):161-170.
[10]雷瑜,张小玲,唐宜西,等.北京城区PM2.5及主要污染气体“周末效应”和“假日效应”研究[J].环境科学学报,2015,35(5):1520-1528.
[11]王占山,李云婷,陈添,等.北京市臭氧的时空分布特征[J].环境科学,2014,35(12):4446-4453.
[12]陈小敏,李轲.重庆主城区人工增雨对空气质量的影响分析[J].西南师范大学学报:自然科学版,2010,35(6):152-156.
[13]郭利,张艳昆,刘树华,等.北京地区PM10质量浓度与边界层气象要素相关性分析[J].北京大学学报:自然科学版,2011,47(4):607-612.
[14]赵晨曦,王云琦,张会兰,等.北京地区冬春PM2.5和PM10污染水平时空分布及其与气象条件的关系[J].环境科学,2014(02):418-427.
[15]慕彩芸,屠月青,冯瑶.气象因子对哈密市大气可吸入颗粒物浓度的影响分析[J].气象与环境科学,2011,34(S1):75-79.
[16]郭利,张艳昆,刘树华,等.北京地区PM10质量浓度与边界层气象要素相关性分析[J].北京大学学报:自然科学版,2011,47(4):607-612.
[17]李军,孙春宝,刘咸德,等.气象因素对北京市大气颗粒物浓度影响的非参数分析[J].环境科学研究,2009,22(6):663-669.
[18]王淑英,张小玲.北京地区PM10污染的气象特征[J].应用气象学报,2002,13(S1):177-184.
[19]周江兴.北京市几种主要污染物浓度与气象要素的相关分析[J].应用气象学报,2005,16(S1):123-127.
[20]邓利群,钱骏,廖瑞雪,等.2009年8—9月成都市颗粒物污染及其与气象条件的关系[J].中国环境科学,2012,32(8):1433-1438.