发表机构
ETH Zurich（苏黎世联邦理工学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用机器学习模型，结合多源数据绘制欧洲每小时10米分辨率的NO2地图，发现91个欧盟合规区域实际超标，影响约1.35亿人，为2030年限值评估提供新途径。
AI 中文摘要
二氧化氮（NO2）是一种常见的空气污染物，通过化石燃料的不完全燃烧释放到大气中，与人类的呼吸系统和心血管疾病相关。环境NO2浓度通过空气质量限值进行监管，这些限值利用稀疏的固定监测站网络进行评估。修订后的欧盟环境空气质量指令（2024/2881）引入了自2030年起需满足的每日NO2限值。目前，无论是监管监测网络还是现有的粗略年均模型，都无法在评估合规性所需的空间和时间分辨率上解析NO2浓度。在此，我们利用一种机器学习模型，将地面监测站与卫星、再分析、土地利用、交通和排放数据相结合，并在每个位置返回校准的预测分布，以每小时和10米分辨率绘制整个欧洲的NO2地图。经过对留出监管监测站和独立公民科学活动的验证，这些地图解析了欧洲110个大都市区域的高分辨率时空NO2梯度。我们重建了这些区域的每日合规统计，发现91个被监管监测网络认定为合规的欧盟空气质量区域存在限值超标，覆盖约1.35亿人口。除空气质量区域和监测站位置外，估计有9%-9.4%（2000万）的绘图区域人口生活在每日NO2限值超标的地区。高分辨率地图为2030年限值的人口规模合规性评估提供了途径。
英文摘要
Nitrogen dioxide (NO2) is a common air pollutant, released into the atmosphere through the incomplete burning of fossil fuels, and associated with respiratory and cardiovascular diseases in humans. Ambient NO2 concentrations are regulated through air-quality limits assessed with a sparse network of fixed monitors. The revised EU Ambient Air Quality Directive (2024/2881) introduces a daily NO2 limit to be met from 2030. At present, neither the regulatory monitoring network nor existing coarse, annual-mean models can resolve NO2 concentrations at the spatio-temporal resolutions necessary to assess compliance. Here we map NO2 across Europe at hourly and 10m resolution with a machine-learning model that combines ground monitors with satellite, reanalysis, land-use, traffic and emission data and returns a calibrated predictive distribution at every location. Validated against held-out regulatory monitors and independent citizen-science campaigns, the maps resolve high-resolution spatiotemporal NO2 gradients for 110 metropolitan areas in Europe. We reconstruct the daily compliance statistic across those regions and find limit breaches in 91 EU air quality zones deemed compliant by the regulatory monitoring network, covering a population of approximately 135M. Beyond air quality zones and monitor locations, an estimated 9-9.4% (20M) of the population in mapped regions lives in areas where the daily NO2 limit is breached. The high-resolution maps offer a route to population-scale assessment of compliance with the 2030 limits.
