The Canadian National Atmospheric Chemistry Database

The National Atmospheric Chemistry Database (NAtChem) is a data archival and analysis facility operated by the Science and Technology Branch of Environment and Climate Change Canada. The purpose of the NAtChem database is to enhance atmospheric research through the archival and analysis of North American air and precipitation chemistry data. Such research includes investigations into the chemical nature of the atmosphere, atmospheric processes, spatial and temporal patterns, source-receptor relationships and long range transport of air pollutants. The NAtChem Database contains air and precipitation chemistry data from many major regional-scale networks in North America. To contribute to NAtChem, networks must operate for a period of at least two years, must have wide area coverage, and must have regionally-representative sites (rural and background).

国家大气化学数据库（NAtChem）是由加拿大环境与气候变化部科学技术司运营的数据存档与分析平台。NAtChem数据库旨在通过存档和分析北美空气与降水化学数据，提升大气科学研究水平。此类研究涉及对大气化学性质、大气过程、空间与时间分布模式、源-受体关系以及空气污染物长距离传输的探究。NAtChem数据库收录了北美众多主要区域性网络机构的空气与降水化学数据。为向NAtChem数据库贡献数据，网络机构需运营至少两年，覆盖广泛区域，并设立具有区域性代表性的监测站点（包括农村和背景监测站）。