雾霾与GPS对流层天顶延迟相关性探究

发布时间：2018-03-30 23:17

  本文选题：雾霾　切入点：空气质量指数　出处：《武汉大学学报(信息科学版)》2017年05期

【摘要】：利用国际GNSS服务(International GNSS Service,IGS)提供的对流层天顶延迟(zenith path delay,ZPD)产品,研究其与雾霾的相关性,并探究了造成雾霾的"元凶"——悬浮颗粒物与气压、温度和湿度的变化关系。首先,研究了中国境内4个IGS站30d的日平均ZPD与量化评定雾霾的空气质量指数(air quality index,AQI)的变化趋势,发现二者基本同步增大(减小)。内陆3个站点的相关系数绝对值均大于0.5,说明ZPD与表征雾霾的AQI有着较强的相关关系,雾霾对对流层延迟产生影响。其次,对1h采样率的北京房山空气质量分指数(individual air quality index,IAQI)与ZPD进行分析,二者的变化趋势基本一致,其中PM2.5、PM10、AQI与ZPD的相关系数分别为0.504 2、0.539 1和0.555 4。同时,当AQI达到300以上重度污染时,会对ZPD产生5cm以上差值的显著影响。最后,利用IGS的M文件探究了北京房山各IAQI与气压、温度、湿度24h变化,一天中IAQI、气压、湿度均呈"U"变化趋势,而温度则呈现倒"U"变化,说明雾霾的形成与气压、温度、湿度相关,并利用逐步线性回归给出了概略模型。
[Abstract]:Using the tropospheric zenith path delay-ZPDs offered by the International GNSS Service, to study its correlation with haze, and to explore the relationship between suspended particulates and air pressure, temperature and humidity, which are the "culprits" that cause haze. The variation trend of daily average ZPD of four IGS stations in China for 30 days and the air quality index (haze) of air quality index (quality) for quantitative evaluation of haze have been studied. It is found that the correlation coefficients of the three stations in the interior are all greater than 0.5, indicating that ZPD has a strong correlation with the AQI representing haze, and haze has an effect on tropospheric delay. The air quality index of Beijing Fangshan at 1 h sampling rate was analyzed by individual air quality index IAQI and ZPD. The variation trend of the two indexes was basically the same. The correlation coefficients between PM2.5 and ZPD were 0.504 ~ 0.539 1 and 0.555 4 respectively. At the same time, when the AQI reached more than 300 heavy pollution, Finally, using the M document of IGS, we explored the changes of IAQI and air pressure, temperature and humidity in Fangshan, Beijing for 24 hours. During the day, IAQI, air pressure and humidity all showed a "U" trend, while the temperature showed a reverse "U" change. The formation of haze is related to air pressure, temperature and humidity, and a general model is given by stepwise linear regression.
【作者单位】： 信息工程大学导航与空天目标工程学院;95956部队;
【分类号】：P228.4
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本文编号：1688098