违反了 PRIMARY KEY 约束 'PK_t_counter'。不能在对象 'dbo.t_counter' 中插入重复键。 语句已终止。 安徽省雾、霾、晴空天气象条件对比分析-Comparisons of Meteorological Conditions on Fog, Haze and Clear Days in Anhui Province, China
doi:  10.3878/j.issn.1006-9585.2016.16045
安徽省雾、霾、晴空天气象条件对比分析

Comparisons of Meteorological Conditions on Fog, Haze and Clear Days in Anhui Province, China
摘要点击 649  全文点击 238  投稿时间:2016-03-01  最后修改时间:2016-06-15
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基金:  国家重点基础研究规划项目
中文关键词:  雾,霾,气象条件,边界层,安徽
英文关键词:  Fog, Haze, Meteorological  conditions, Boundary Layer, Anhui
              
作者中文名作者英文名单位
石春娥SHI Chun’e安徽省气象科学研究所
邓学良DENG Xueliang安徽省气象科学研究所
余金龙YU Jinlong安徽省气象台
张浩ZHANG Hao安徽省气象科学研究所
杨元建YANG Yuanjian安徽省气象科学研究所
引用:石春娥,邓学良,余金龙,张浩,杨元建.2017.安徽省雾、霾、晴空天气象条件对比分析[J].气候与环境研究
Citation:SHI Chun’e,DENG Xueliang,YU Jinlong,ZHANG Hao,YANG Yuanjian.2017.Comparisons of Meteorological Conditions on Fog, Haze and Clear Days in Anhui Province, China[J].Climatic and Environmental Research(in Chinese)
中文摘要:
      揭示了安徽不同地区雾、霾、晴空天气象条件的差异,指出不同地区要根据本地特点建立雾霾预报指标和预报方法。三类天气差异最大的地面气象要素是能见度和相对湿度。根据三种天气前一日和当日能见度和相对湿度分布特征,全省站点可以分为三类:①从雾、霾到晴空,能见度递增、相对湿度递减,且差异显著,如合肥站;②雾、霾天的能见度和相对湿度很接近,但与晴空天差别较大,如阜阳站;③能见度在雾、霾天无明显差别,但相对湿度在雾、霾天差异显著,如安庆站。地级市测站雾后即霾的可能性较大(大于50%),县城测站雾后即霾的可能性较低(低于25%)。垂直方向,雾时相对湿度随高度下降很快,850hPa中位值已降到20%(安庆)和45%(阜阳)以下,霾时相对湿度随高度下降缓慢,850hPa中位值仍在60%左右;霾天边界层中上部风切变较小,雾天和晴空天边界层中上部都存在较大的风切变。
Abstract:
      Based on the differences of meteorological conditions among fog, haze and clear days, we concluded that the forecasting methods and index of fog and haze should be set up for different regions based on the local conditions. Among the surface meteorological parameters, visibility and relative humidity showed the most evident differences on the above-mentioned three weathers. According to the visibility and relative humidity at 20:00 before the day and 14:00 on the day, all studied sites in Anhui province were divided into three categories: (1) From fog, haze to clear days, the visibility increased and relative humidity decreased evidently, e.g. Hefei. (2) Visibility and relative humidity were both very close on fog and haze days, but were evidently different from those on clear days, e.g. Fuyang. (3)Visibility showed insignificant difference between fog and haze days, while relative humidity showed evident differences between fog and haze days, e.g. by Anqing. More than 50% of fogs were followed by hazes at urban sites; while only no more than 25% of fogs were followed by hazes at county sites. In the vertical, the relative humidity decreased with height very quickly during fog, with the median value lower than 20% at 850 hPa at Anqing station and lower than 45% at Fuyang station; while it decreased slowly during haze with the median around 60% at 850 hPa at both sstationes. In addition, the wind shear from the middle to upper boundary layer was smaller on haze days than on fog and clear days.
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