2013年春节假期深圳的灰霾天气特征

Analysis of the Characteristics of Hazy Weather in Shenzhen During the Holiday of Spring Festival in 2013

2013年春节假期,深圳出现了5次较长时间的灰霾天气。通过分析当时灰霾天气发生时的能见度水平、湿度、风速以及颗粒物质量浓度,结果表明:在春节假期前、假期间以及假期后,均出现不同程度的灰霾天气,颗粒物质量浓度分布具有明显的局地性,尤以城乡结合部居住密度较高的石岩站最为明显,市区的竹子林站趋势也与石岩站类似,但是"峰值"较低,而城郊的趋势则没有明显的一致性,原因是人群在节日前后的活动,包括出行、庆祝活动等非外来源的污染物排放,使得具有显著的局地性,在不利的气象条件下灰霾趋于严重,排放集中使得部分时段出现有较大风速但颗粒物质量浓度却较高的情形。

During the holiday of place in Shenzhen. In this work, the associated with them are studied. The Spring Festival in 2013, five extended processes of hazy weather took visibility, humidity, wind speed and mass concentration of particulates result is shown as follows. Haze appeared before, during and after the holiday of Spring Festival and the mass concentration of particulates showed significant locality, being the most obvious at the site of Shiyan, a densely populated area that connects the urban with the rural parts of the city. The site of Zhuzilin, an urban area of Shenzhen, showed similar distribution to that of Shiyan but with a lower peak. By contrast, the trend of the suburban district did not have any significant consistent tendency. It was caused by human activity, which included the discharge of pollutants from local sources of traveling and celebrations, making the distribution highly localized. Under unfavorable meteorological conditions, the haze tended to worsen and the concentrated discharge resulted in high mass concentration of particulates with large wind speed over some periods of time.