湖北三種地形下AQI特征及其與氣象因子的關系
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國家重點研發計劃項目(2017YFC0212603)“武漢城市圈大氣污染聯防聯控技術集成與應用示范”和湖北省氣象局重點基金項目(2014Z03)“湖北省城市空氣質量預報技術研究”共同資助


Characteristics of AQI and Relationship with Meteorological Factors in Three Terrains over Hubei
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    摘要:

    基于2015—2016年湖北省環境監測數據和氣象資料,分析了3種地形下空氣質量指數(AQI)特征及其與氣象因子的關系。結果表明:湖北省年空氣質量指數時空分布特征為山區低平原高,冬季高夏季低,日高峰值襄陽出現在中午,武漢和宜昌出現在23:00—24:00;與空氣質量指數關系較顯著的氣象因子包括相對濕度、變溫、變壓、風、降水等,其中降水對污染物的沉降作用跟空氣質量等級有關,污染程度越重,需要清潔空氣的雨量越大,輕度以上污染時,需要中雨及以上降水才會產生有效清潔,當降水為微量(1 mm以下)時,AQI反而會增長;受不同地形影響,不同城市污染天氣輸入路徑不同,襄陽為北風、武漢西北風、宜昌多弱東風擾動,且襄陽大風速出現的頻數較高,而宜昌以小風為主。

    Abstract:

    Based on the data of environmental monitoring and meteorological elements in Hubei Province in 2015 and 2016, this paper analyzes the characteristics of air quality and its relationship with meteorological factors in three kinds of terrains. The results show that the temporal and spatial distribution of air quality in Hubei Province was low in mountain and high in plain areas, and the high value of AQI in winter and low value of that in summer. It is shown that the daily maximum AQI of Xiangyang appeared at noon, and the highest value of Wuhan and Yichang appeared from 23:00 to 24:00 Meteorological factors that have obvious relationship with air quality include relative humidity, variable temperature and pressure, wind, precipitation, of which precipitation effect on pollutant sedimentation is related to the air quality grade. The heavier the pollution, the greater the amount of rain needed to clean the air. For mild and above pollution, moderate and above precipitation will be effective for clean air. When precipitation is in trace level (below 1 mm), there will be a growing trend in AQI. Under different terrain influences, there blew mainly north winds in Xiangyang, northwest winds in Wuhan and the weak easterly wind disturbance in Yichang in case of heavy pollution. The occurence frequency of large wind speed in Xiangyang was obviously higher than the others, and Yichang was dominated by breeze.

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王曉玲,岳巖裕,陳賽男,祝贏,陳楠.湖北三種地形下AQI特征及其與氣象因子的關系[J].氣象科技,2018,46(5):1012~1019

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  • 收稿日期:2017-09-29
  • 定稿日期:2018-01-26
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  • 在線發布日期: 2018-10-31
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