Air quality measured at Châtelet RER A station

RATP continuously carries out monitoring and expertise on air quality circulating in underground railway enclosures. Monitoring is based primarily on compliance with the conditions of hygiene and cleanliness of the RATP’s spaces, both for travellers and for staff. The RATP laboratory performs continuous measurements at 5 stations representative of the RATP underground spaces (Châtelet, Franklin Roosevelt and Auber, Châtelet RER A and Nation RER A) which constitute the squal network (Monitoring of Air Quality of the Underground Environment). This dataset corresponds to the station Châtelet on line A of the RER. Measurements cover the usual climatic parameters (temperature, relative humidity), air renewal (carbon dioxide) and air quality (nitrogen oxides, particulate matter). This network automatically produces more than 200000 raw data per year. The hourly averages of these measurements are the published database. Spot measurement campaigns also allow monitoring of other parameters, such as ultrafine particles, aldehydes, monocyclic or polycyclic aromatic hydrocarbons.巴黎大众运输公司（RATP）持续对地铁地下封闭空间内的空气环境开展空气质量监测与专业评估工作。本次监测的核心依据为RATP运营空间面向乘客与工作人员的卫生及洁净合规标准。 RATP实验室在5个具有巴黎地铁地下空间代表性的站点开展持续监测工作，分别为夏特雷（Châtelet）、富兰克林·罗斯福（Franklin Roosevelt）、欧贝（Auber）、夏特雷RER A线以及民族站（Nation RER A）。上述站点共同构成SQUAL监测网络，其全称为「地下环境空气质量监测」（Monitoring of Air Quality of the Underground Environment）。 本数据集对应RER A线夏特雷站的监测数据。 本次监测覆盖常规气象参数（温度、相对湿度）、空气更新相关指标（二氧化碳浓度）以及空气质量参数（氮氧化物、颗粒物）。 该监测网络年均自动产出原始数据超20万条，本次公开数据库发布的为上述监测数据的小时均值。此外，定点监测专项活动还可同步获取超细颗粒物、醛类、单环及多环芳烃等其他参数的监测数据。