摘要
近年来,以细颗粒物(PM2.5)为主要污染物的北京地区大气污染已成为人们高度关注的环境问题。本文利用2013年北京市密云地区上甸子国家气象观测站和区域大气本底污染监测站PM2.5监测数据和气象要素数据,分析了北京地区PM2.5浓度与气象条件之间的关系。结果表明:北京地区气象因素对PM2.5污染具有显著影响,其中降水、日照时数对PM2.5浓度有显著的正相关关系,随着降水和日照时数增加,PM2.5日平均浓度和日最高浓度均呈显著下降;相对湿度对PM2.5浓度有显著的负相关关系,随着相对湿度增加,PM2.5浓度显著上升;最大风速与PM2.5浓度呈倒U型关系,较低的风速将导致PM2.5污染增加,但风速达到一定级别时,可有效促进污染扩散,降低PM2.5浓度。北京地区夏季PM2.5污染水平显著低于其他季节。
In recent years,air pollution characterized with fine particulate matter（ PM2. 5） as main air pollutant in Beijing had become an environmental issue of great concern. Based on PM2. 5monitoring data and various meteorological data at Shangdianzi national meteorological station and regional air pollution background monitoring station in Beijing area in 2013,relationships between PM2. 5concentrations and meteorological conditions in this area were analyzed. The results showthat meteorological elements have a significant impact on PM2. 5concentration in Beijing area. Among them,precipitation and sunshine duration have significant impact on PM2. 5concentration. Daily average and maximum concentrations of PM2. 5are in a significantly decreasing trend with increasing precipitation and sunshine duration. On the other hand,relative humidity has also significant impact on PM2. 5concentration. PM2. 5concentration increases significantly with increase of relative humidity. There is an inverted U-shaped relationship between daily maximum wind speed and PM2. 5concentration. Lower wind speed causes increase of PM2. 5concentration,while higher wind speed promotes effectively diffusion of pollutants and reduces PM2. 5concentration. PM2. 5concentration is significantly lower in summer than in other seasons in Beijing area.
出处
《气象与环境学报》
2015年第5期99-104,共6页
Journal of Meteorology and Environment
基金
中国气象局气候变化专项"城市生活用水需求的天气敏感性评价及气候响应研究"(CCSF201434)
环保公益性行业科研专项"环保产业发展模式分析及环保产业绩效性指标体系设计"(201209055)共同资助
关键词
PM2.5
气象要素
相关
PM2.5
Meteorological elements
Correlation
