2017年邯郸市气象扩散条件评估分析
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摘要
2017年,邯郸市达标天数142 d,重污染天数43 d。年内出现3 d以上AQI>200的重污染过程6次,与2016年持平。全市年均静稳天气指数与2016年持平;年平均风速比2016年减小,小风日数增加,水平扩散能力较差;年均混合层高度与2016年同期基本持平,垂直扩散条件相当。2017年1—10月气象扩散条件总体不利,11—12月气象扩散条件好于2016年;2017年1—10月静稳指数为近5年最大,混合层高度最低,降水量最少,平均风速最小,小风日数最多,气象扩散条件相对较差;2017年10月气象扩散条件与2016年同期相比较差,2017年11月、12月气象扩散条件与2016年同期相比较好。
It was found that the air quality of Handan improved in 2017, as the number of heavy pollution days decreased to 43 days, and the number of days that reached standards increased to 142 days; meanwhile, in2017, the heavy pollution weather lasting more than three consecutive days with AQI>200 happened 6 times in Handan, similar to that in 2016. Also, the average annual stationary weather index in 2017 was almost the same as that in 2016; the annual mean wind speed in 2017 decreased when compared with that in 2016, while the annual small wind days increased, thus leading to poor horizontal diffusion ability; the average annual mixing layer height in 2017 was also almost the same as that in 2016, and so was the vertical diffusion condition. From January to October in 2017, the meteorological diffusion conditions were generally unfavorable, while in November and December, they were much favorable than that in 2016. From January to October in 2017, the stationary weather index was the maximum in nearly five years, with the lowest mixing layer height, minimum precipitation and mean wind speed, and the maximum number of small wind days, and thus resulting in relatively poor meteorological diffusion conditions. So, from January to October in 2017, the average meteorological diffusion conditions decreased significantly compared with that in 2016 in the same period, while from November to December in 2017, the conditions were much favorable than that in 2016.
It was found that the air quality of Handan improved in 2017, as the number of heavy pollution days decreased to 43 days, and the number of days that reached standards increased to 142 days; meanwhile, in2017, the heavy pollution weather lasting more than three consecutive days with AQI>200 happened 6 times in Handan, similar to that in 2016. Also, the average annual stationary weather index in 2017 was almost the same as that in 2016; the annual mean wind speed in 2017 decreased when compared with that in 2016, while the annual small wind days increased, thus leading to poor horizontal diffusion ability; the average annual mixing layer height in 2017 was also almost the same as that in 2016, and so was the vertical diffusion condition. From January to October in 2017, the meteorological diffusion conditions were generally unfavorable, while in November and December, they were much favorable than that in 2016. From January to October in 2017, the stationary weather index was the maximum in nearly five years, with the lowest mixing layer height, minimum precipitation and mean wind speed, and the maximum number of small wind days, and thus resulting in relatively poor meteorological diffusion conditions. So, from January to October in 2017, the average meteorological diffusion conditions decreased significantly compared with that in 2016 in the same period, while from November to December in 2017, the conditions were much favorable than that in 2016.
引文
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[7]余光明,王磊,安乐生,等.安庆市2007-2013年大气污染物变化特征研究[J].江西农业学报,2015,27(1):81-85.
[8]孙丹,杜昊鹏,高庆先,等.2001年至2010年中国三大城市群中几个典型城市的API变化特征[J].资源科学,2012,34(8):1401-1407.
[9]靳军莉,颜鹏,马志强,等.北京及周边地区2013年1-3月PM2.5变化特征[J].应用气象学报,2014,25(6):690-700.
[10]杨静,武疆艳,李霞,等.乌鲁木齐冬季大气边界层结构特征及其对大气污染的影响[J].干旱区研究,2011,28(4):717-723.
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[14]程涛.基于小波分析的上海市环境空气质量变化及与气象关系研究[D].上海:华东师范大学,2007.
[15]郭勇涛,佘峰,王式功,等.兰州市空气质量状况及与常规气象条件的关系[J].干旱区资源与环境,2011,25(11):100-105.
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[27]吴兑,廖国莲,邓雪娇,等.珠江三角洲霾天气的近地面输送条件研究[J].应用气象学报,2008,19(1):1-3.
[28]邓长菊,尹晓惠,甘璐.北京雾与霾天气大气液态水含量和相对湿度层结特征分析[J].气候与环境研究,2014,19(2):193-199.
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[30]郭丽君,郭学良,方春刚,等.华北一次持续性重度雾霾天气的产生、演变与转化特征观测分析[J].中国科学:地球科学,2015,45(4):427-443.
[31]李菲,吴兑,谭浩波,等.广州地区旱季一次典型灰霾过程的特征及成因分析[J].热带气象学报,2012,28(1):113-122.