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长沙地区雾霾特征及影响因子分析

Keywords: 雾霾,特征,影响因子

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Abstract:

根据长沙地区1970—2012年气象观测资料及环境监测数据,对近43年长沙雾霾特征及影响因子进行了分析。结果表明,长沙地区雾的年际变化具有显著的倒“U”型特征,霾整体上呈上升趋势;雾霾天气主要集中在秋冬季节,春夏季节较少;从空间分布来看,望城区(县)和宁乡县雾霾天气最多,浏阳市次之,长沙市区最少。在一次持续性雾霾天气过程中(10.2~10.12),相对湿度、PM2.5质量浓度与能见度呈现显著负相关,说明PM2.5质量浓度和相对湿度是雾霾天气形成的首要影响因子。

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