基于实测PM2.5、能见度和相对湿度分辨雾霾的新方法

被引：20

作者：

马楠 ^{[1
]}

赵春生 ^{[1
]}

陈静 ^{[1
]}

徐婉筠 ^{[1
,2
]}

颜鹏 ^{[3
]}

周秀骥 ^{[1
,2
]}

机构：

[1] 北京大学物理学院大气与海洋科学系

[2] 中国气象科学研究院

[3] 中国气象局气象探测中心

来源：

中国科学:地球科学 | 2015年 / 45卷 / 02期

关键词：

能见度; 雾霾分辨; PM2.5; 气溶胶吸湿增长; 相对湿度;

D O I：

暂无

中图分类号：

X513 [粒状污染物]; P427.2 [能见度、浑浊度];

学科分类号：

0706 ; 070602 ; 070601 ;

摘要：

霾是由于气溶胶增多或相对湿度增大引起气溶胶吸湿增长而导致的能见度降低的现象,而雾是气溶胶经过活化变成雾滴而造成的低能见度事件,在气象观测中如何对两者进行准确区分一直是一个存在争议的问题.本文以雾和霾在物理性质上的客观区别为基础,介绍了一种全新的基于实测PM2.5、能见度和相对湿度来分辨雾和霾的新方法.通过对当地历史观测的气溶胶谱分布数据进行拟合和统计,并结合气溶胶吸湿增长特性计算得到判别参考值.通过将实际测量的PM2.5、能见度和相对湿度与判别参考值相比对,来估计当前状况是雾或霾的概率.本方法可操作性强,基于常规观测仪器即可实现.

引用

页码：227 / 235

页数：9

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