Improving PM10 sensor accuracy in urban areas through calibration in Timișoara

IF 8.5 1区 地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES npj Climate and Atmospheric Science Pub Date : 2024-11-01 DOI:10.1038/s41612-024-00812-0
Robert Blaga, Sneha Gautam
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Abstract

Low-cost particulate matter sensors (LCS) are vital for improving the spatial and temporal resolution of air quality data, supplementing sparsely placed official monitoring stations. Despite their benefits, LCS readings can be biased due to the physical properties of aerosol particles and device limitations. An optimization model is essential to enhance LCS data accuracy. This paper presents a calibration study of the LCS network of Timișoara, Romania. The calibration began by selecting LCS devices near National Air Quality Monitoring Network (NAQMN) stations and developing parametric models, choosing the best for broader application. Plantower, Sensirion, and Honeywell sensors showed comparable accuracy. Calibration involved clusters within a 750 m radius around NAQMN stations. Models incorporating RH corrections and multiple linear regression (MLR) were fitted. The best model was validated against data from unseen sensors, leading to mean bias errors (MBE) within 9-17% and RMSEs of 33-35%, within sensor uncertainty margins. Applied to the city-wide LCS network, the model identified several stations regularly exceeding the EU daily PM10 threshold, unnoticed by NAQMN stations due to their limited coverage. The study highlights the necessity of granular monitoring to accurately capture urban air quality variations.

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在蒂米什瓦拉通过校准提高城市地区 PM10 传感器的准确性
低成本颗粒物传感器(LCS)对于提高空气质量数据的空间和时间分辨率至关重要,是对稀少的官方监测站的补充。尽管 LCS 有很多优点,但由于气溶胶颗粒的物理特性和设备的限制,LCS 的读数可能会有偏差。优化模型对于提高 LCS 数据的准确性至关重要。本文介绍了罗马尼亚蒂米什瓦拉 LCS 网络的校准研究。校准工作首先在国家空气质量监测网(NAQMN)站点附近选择 LCS 设备,并开发参数模型,选择最适合更广泛应用的模型。Plantower、Sensirion 和 Honeywell 传感器的精度相当。校准涉及 NAQMN 监测站周围 750 米半径范围内的群集。对包含相对湿度校正和多元线性回归 (MLR) 的模型进行了拟合。根据未见传感器的数据对最佳模型进行了验证,得出的平均偏差误差 (MBE) 在 9-17% 之间,均方根误差 (RMSE) 在 33-35% 之间,均在传感器不确定性范围之内。将该模型应用于全市范围内的 LCS 网络,发现了几个定期超过欧盟每日 PM10 临界值的站点,由于其覆盖范围有限,NAQMN 站点并未注意到这些站点。这项研究强调了进行精细监测以准确捕捉城市空气质量变化的必要性。
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来源期刊
npj Climate and Atmospheric Science
npj Climate and Atmospheric Science Earth and Planetary Sciences-Atmospheric Science
CiteScore
8.80
自引率
3.30%
发文量
87
审稿时长
21 weeks
期刊介绍: npj Climate and Atmospheric Science is an open-access journal encompassing the relevant physical, chemical, and biological aspects of atmospheric and climate science. The journal places particular emphasis on regional studies that unveil new insights into specific localities, including examinations of local atmospheric composition, such as aerosols. The range of topics covered by the journal includes climate dynamics, climate variability, weather and climate prediction, climate change, ocean dynamics, weather extremes, air pollution, atmospheric chemistry (including aerosols), the hydrological cycle, and atmosphere–ocean and atmosphere–land interactions. The journal welcomes studies employing a diverse array of methods, including numerical and statistical modeling, the development and application of in situ observational techniques, remote sensing, and the development or evaluation of new reanalyses.
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