浅析大连市空气质量污染日特征及成因

2013年大连市区全年共有污染日75 d,其中86%的首要污染物为PM2.5。在10个国控空气自动监测子站中,2013年1月份出现污染日的样本数最多,出现污染日最多的是甘井子子站（三类功能区）。大连地区空气污染日的出现具有明显的季节性分布特征,空气质量主要受燃煤、机动车尾气排放、雾霾及外来沙尘的影响。

A Brief Analysis on Dalian Air Quality Pollution Days＇ Features and Contributing Factors

There were 75 pollution days in 2013 and 86% of the primary pollutants were PM2.5. The sample numbers of the pollution days during January 2013 were the largest among 10 national-controlled air quality automatic monitoring stations. Ganjingzi substation, which is the Type Three Functional Area appeared the most pollution days. Air pollution days in Dalian presented explicitly seasonal distribution feature. The major factors of Dalian air pollution were coal heating, motor vehicle exhaust, haze and the external sand and dust weather.