秸秆焚烧导致湖北中东部一次严重霾天气过程的分析

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• 论文作者：周悦 ; 岳岩裕 ; 李兰 ; 刘敏 ; 周婷
• 年：2016
• 作者机构：武汉区域气候中心;武汉中心气象台;孝感市气象局;
• 论文关键词：秸秆焚烧 ; 霾天气 ; 污染物 ; 风矢量和
• 会议召开时间：2016-10-14
• 会议录名称：2016中国环境科学学会学术年会论文集（第三卷）
• 语种：中文
• 分类号：X51
• 学会代码：HJKP
• 会议名称：中国环境科学学会2016年学术年会
• 会议地点：中国海南海口
• 主办单位：中国环境科学学会
• 学会名称：中国环境科学学会
• 页数：13
• 文件大小：2619k
• 原文格式：O
• 会议级别：全国

摘要

利用地面气象要素、火点信息及污染物资料,研究了2014年6月12~13日湖北省中东部地区一次重度霾天气的成因及污染特征。结果表明:导致此次霾天气的主要原因是安徽省北部大面积秸秆焚烧所形成污染气团受偏东北气流输送的影响,12日在湖北中东部形成了两条"带状"的能见度低值区,最低能见度仅为2.1km。秸秆焚烧污染物输送气流由北向南影响湖北,主要作用于孝感-武汉-咸宁一带,3个地区PM_(2.5)峰值浓度均超过了600μg/m~3,且武汉和孝感的PM_(2.5)与PM_(10)质量浓度比值在12日增加到0.76和0.77,并出现了0.96和0.93的最大值,随着污染气团的传输,其中PM_(2.5)所占比例会出现明显下降。SO_2质量浓度的变化特征不显著,NO_2质量浓度在污染物质量浓度达到峰值前1~3小时达到峰值,而CO是秸秆焚烧产生的主要污染气体,其质量浓度变化与PM_(2.5)和PM_(10)呈正相关关系,相关系数分别为0.66和0.67。风矢量和分析表明:6月12日湖北省中东部存在明显的东北来向气流输送,污染物的输送是该时段霾天气发生的主要影响因子,而6月13日湖北省东北边界处的输送气流已经明显减弱消失,东南部风矢量和异常偏小导致的污染物堆积是该地区污染持续的主要原因。

引文

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