Country Trends in Major Air Pollutants

The Country Trends in Major Air Pollutants data set is a framework of public-health-focused air quality indicators that quantifies over 200 countries' trends in exposure to Particulate Matter (PM2.5), Ozone (O3), Nitrogen Oxides (NOx), Sulfur Dioxide (SO2), Carbon Monoxide (CO), and Volatile Organic Compounds (VOCs). Pollutant concentration data are derived from the European Centre for Medium-Range Weather Forecasts (ECMWF) Atmospheric Composition Reanalysis 4 (EAC4) data sets, freely available from the Copernicus Atmospheric Monitoring Services' Atmospheric Data Store (https://ads.atmosphere.copernicus.eu). CIESIN's Gridded Population of the World, Version 4 (GPWv4): Population Count Adjusted to Match 2015 Revision of UN WPP Country Totals, Revision 11 was used in the population weighting algorithm.

《主要空气污染物国家趋势》数据集系一套以公共卫生为核心，量化200多个国家暴露于颗粒物（PM2.5）、臭氧（O3）、氮氧化物（NOx）、二氧化硫（SO2）、一氧化碳（CO）和挥发性有机化合物（VOCs）趋势的空气质量指标体系。污染物浓度数据源自欧洲中期天气预报中心（ECMWF）大气成分再分析4（EAC4）数据集，该数据集可通过哥白尼大气监测服务大气数据存储（https://ads.atmosphere.copernicus.eu）免费获取。在人口加权算法中使用了CIESIN的《世界人口网格》版本4（GPWv4）：调整至与联合国2015年修订版世界人口前景（WPP）国家总数相匹配的人口计数，修订版11。