文献类型：期刊文献

中文题名：北京市重度大气污染时段污染物时空扩散特征

英文题名：Pollutant Diffusion Features of Severe Air Pollution Period in Beijing

作者：熊黑钢[1];赵君仪[1];张景秋[1]

第一作者：熊黑钢

机构：[1]北京联合大学应用文理学院

第一机构：北京联合大学应用文理学院

年份：2015

卷号：38

期号：9

起止页码：75-81

中文期刊名：环境科学与技术

外文期刊名：Environmental Science & Technology

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金(41271185);北京市属高等学校高层次人才引进与培养计划项目(IDHT20130322);北京联合大学人才强校计划资助项目(BPHR2012E01)

语种：中文

中文关键词：重度污染;时空;扩散;大气污染

外文关键词：severe pollution; space-time; diffusion; air pollution

摘要：该文通过分别对北京市重度大气污染时段的风力与空气污染指数(API)以及空气质量指数(AQI)分析,建立了风力预测大气污染程度的回归模型,并探讨了不同风力条件下空气质量(污染)指数时空扩散规律。结果表明:(1)风力与空气质量指数和空气质量指数均为负相关,且有极其显著的相关性,但空气质量指数对风力的响应程度更高。(2)各空气污染指数预测模型均表现出南部模型精度>中部>北京市>北部,前者比后者的精度高16%~26%。二次模型是预测空气污染指数简便、实用、有效的模型。而在空气质量指数预测模型中,北京市、中部及南部均是指数模型预测能力最好,二次模型较差。北部则相反。(3)重度大气污染时段,大气污染物由南向北扩散过程基本需要3 d时间。若南部空气质量指数>300,且污染过程持续4 d,则北部的污染程度将超过南部。一般情况下,风力需要大于3级,且要持续1 d以上,空气污染程度才会降低。否则,全市大气污染程度相差不大,均处于重度或严重污染。
Based on the analysis of Beijing＇s severe air pollution period of the wind, air pollution index （API） and air quality index （AQI）, wind forecasting air pollution degree of regression model was established while AQI space-time diffusion regularity under different wind conditions was discussed. Results showed that wind and air quality index and air quality index are negative correlation, and there are extremely significant correlation, especially the air quality index. All air pollution index prediction model about the model accuracy comparison showed the same result as South〉Central^Beijing〉 North, with the former 16%-26% higher than the latter. Quadratic model predicting the APlis simple, practical and effective. However, in the air quality index prediction model, index model＂ shows the best predictive ability for Beijing, Central and South while quadratic model is poor. The prediction of North is the opposite. During the severe air poUution period, the diffusion process of atmospheric pollutants from south to north basically takes 3 days. If the southern part of the air quality index is greater than 300, and pollution process lasted for 4 days, with the pollution of North more than that of the South. In general, wind need to be greater than level 3, and lasts more than I day, the degree of air pollution will decrease. Otherwise, the city＇s air pollution levels are similar, which means they all almost are in severe or serious pollution.