摘要
针对因气象要素种类较多,导致污染物扩散程度难以判定的问题,提出一种基于灰色关联的污染扩散特征与气象要素相关性分析方法。根据历史数据采集主城区、其他城区的空气污染扩散特征分布情况,分别计算大颗粒和小颗粒污染物的污染等级,凭借相关数据存在同一发展势态的特点,求得污染物扩散特征和气象要素的关联系数,通过关联因子推导得到特征与要素间的正负关联区间,以区间值对比实现相关性判定。实验数据证明,空气污染扩散特征与风向、风速以及降水量气象要素间存在负相关关系,要素变化程度越高,扩散特征表现越明显。
It is difficult to determine the degree of pollutant diffusion due to the variety of meteorological elements.This paper proposed a correlation analysis method between pollution diffusion characteristics and meteorological elements based on gray correlation.According to the distribution of air pollution diffusion characteristics in the main urban area and other urban areas of historical data collection,the pollution levels of large and small particle pollutants are calculated respectively.By virtue of the characteristics of the same development trend of relevant data,the correlation coefficient between pollutant diffusion characteristics and meteorological elements is obtained.The positive and negative correlation intervals between features and elements are derived from the correlation factors,and the correlation is determined by comparing the interval values.The experimental data show that there is a negative correlation between the diffusion characteristics of air pollution and meteorological elements such as wind direction,wind speed and precipitation.The higher the degree of change of elements,the more obvious the diffusion characteristics are.
作者
汪媛媛
Wang Yuanyuan(Shaanxi Meteorological Service Center,Xi’an 710014,China;Key Laboratory of Eco-Environment and Meteorology for the Qinling Mountains and Loess Plateau,Xi’an 710014,China)
出处
《环境科学与管理》
CAS
2023年第5期27-32,共6页
Environmental Science and Management
基金
中国气象局创新发展专项任务书:秦岭及周边地区复杂地形影响下强降水演变及预报方法(CXFZ 2022J023)。
关键词
空气污染扩散特征
气象要素
污染等级
发展势态
负相关关系
diffusion characteristics of air pollution
meteorological elements
class of pollution
development trend
negative correlation
