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江西省近50年霾天气时空分布特征及成因分析
蒋璐君1, 刘熙明1, 张弛2
(1.江西省气象科学研究所;2.江西省气象台)
Spatial-Temporal Characteristics of Haze and its Forming Reason in Jiangxi Province During the Past 50 Years
jianglujun1, liuximing1, zhangchi2
(1.Jiangxi Institute of Meteorological Science;2.Jiangxi Meteorological Observatory,)
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投稿时间:2018-07-03    修订日期:2020-02-29
中文摘要: 摘要 利用江西省83站1964-2013年逐日霾观测资料,运用线性倾向估计等统计方法,分析江西省近50年灰霾时空变化特征及其与气候要素的关系。结果表明:江西霾日数呈赣中北部多,赣南少的特点,赣中的萍乡-宜春-抚州-上饶一带以及赣北北部的九江中部、景德镇北部地区是霾天气多发区,年均霾日数在30d/a以上。冬季霾日数最多,萍乡-宜春-鹰潭地区中北部、南昌-九江的中部以及上饶东部地区超过20d/a,春季和秋季次之,夏季最少。12月是霾日数最多的月份,接近全年霾日数的2成。江西省霾日数呈年际增长的趋势,增长率为11d/10a,气候趋势系数为0.78,通过99%的显著性检验。霾日数与平均风速和大风日数呈负相关,而与静风日数呈正相关。近50年平均风速和大风日数呈下降趋势,静风日数呈上升趋势,这可能导致空气中污染物不易扩散而形成更多的霾天气。江西省降水日数呈减少趋势(-6.3d/10a),气温呈增暖趋势(0.15°C/10a),霾日数与气温和降水日数分别呈正负相关。
中文关键词: 江西    年际变化  统计分析
Abstract:Abstract The temporal and spatial distribution characteristics of hazes and the climatic background were analyzed by using daily abservations of haze of 83 meteorological stations from 1964 to 2013 and statistical methods of linear regression.The result show that haze days are significantly more in central-northern Jiangxi than southern Jiangxi. The annual haze days are more than 30 d in central Jiangxi, such as Pingxiang, Yichun, Fuzhou and Shangrao, and in northern Jiangxi,such as central Jiujiang, northern Jingdezhen, which are mutiple area of haze days. The haze days are maximum in winter, followed by autumn and sprind, and the minimum in summer. The central-northern Pingxiang, Yichun and Yingtan,central Nanchang and Jiujiang as well as eastern Shangrao are more than 20d per year. The haze days are the most in December, nearly 20% of annual haze days. The haze days in Jiangxi Province have a significant increasing trend of 11d per decade during 1964-2013 and the climatic trend coefficient is 0.78, which is passed by 99% significant test. The correlation coefficient is mainly negative in Jiangxi Province between haze days and mean wind speed, strong wind days, but positive between haze days and breeze days in Jiangxi Province. In the past 50 years, the annual averaged wind days and stong wind days show a downward trend, and the breeze days show a upward trend, which may cause the accumulation of pollutants in the air to form more haze weather. The correlation coefficient is mainly negativein in Jiangxi Province between haze days and precipitation days, and the precipitation days showed decreasing trends in Jiangxi,with the rate of around -6.3 d per decade. The correlation coefficient is mainly positive in Jiangxi Province between haze days and temperature, and the temperature showed increasing trends in Jiangxi,with the rate of around 0.15°C per decade.
文章编号:201807030293     中图分类号:    文献标志码:
基金项目:国家自然科学基金项目(41265003,41765001);江西省科技厅重点项目(20151BBG70045)
引用文本:
蒋璐君,刘熙明,张弛,0.[en_title][J].Meteor Mon,():-.
jianglujun,liuximing,zhangchi,0.Spatial-Temporal Characteristics of Haze and its Forming Reason in Jiangxi Province During the Past 50 Years[J].Meteor Mon,():-.