Dataset for "Spatial attenuation of noise and PM2.5 in roadside pocket parks"

This dataset contains 544 field measurements of traffic noise and particulate matter concentrations collected from 12 roadside pocket parks in Shenyang, China. The study investigates how these environmental indicators attenuate with increasing distance from the road boundary into park interiors.

Measurements were taken along transects perpendicular to the adjacent road. Each transect comprises a roadside baseline point (P1, distance = 0 m) and up to six interior points (P2-P7) at distances of 5 to 50 metres. Acoustic data (A-weighted equivalent continuous sound level, LAeq) were recorded with a calibrated Class 1 sound level meter, and particulate matter concentrations (PM1, PM2.5, PM10, respirable PM, and TSP) were measured simultaneously with a portable particle counter. Each park was measured over 3-4 rounds during morning (7:00-9:00) and evening (17:00-19:00) peak traffic periods under dry, low-wind conditions.

The dataset is provided as a single CSV file (measurements.csv, UTF-8). Each row represents one observation and contains 18 variables: park identifiers (anonymised as Park A-L), measurement point and round labels, distance from the road in metres, LAeq in decibels, five PM fractions in micrograms per cubic metre, park attributes (size category, area, spatial openness, number of street-facing sides), and ambient temperature and humidity. Half of the observations (272 rows at distance = 0) are roadside baselines; the remaining 272 interior-point observations are used for regression analyses in the accompanying paper.

Please cite the accompanying paper when using this dataset.

本数据集包含采自中国沈阳市12处路边袖珍公园（roadside pocket park）的544组道路交通噪声与颗粒物浓度实地观测数据。本研究旨在探究这些环境指标随距离道路边界向公园内部延伸的衰减规律。

观测沿与相邻道路垂直的样带开展，每条样带包含1个道路基准测点（P1，距离道路0米）以及最多6个内部测点（P2至P7），测点与道路的距离范围为5至50米。声学数据采用经校准的1级声级计采集，记录指标为A计权等效连续声级（LAeq）；颗粒物浓度（包含PM1、PM2.5、PM10、可吸入颗粒物（respirable PM）与总悬浮颗粒物（TSP））则通过便携式粒子计数器同步测得。

所有公园的观测均在干燥、低风速的天气条件下，于早高峰（7:00-9:00）与晚高峰（17:00-19:00）时段开展，每个公园共进行3至4轮观测。

本数据集以单个CSV文件（measurements.csv，UTF-8编码）的形式提供。每条数据对应1组观测值，共包含18项变量：公园匿名编号（标记为Park A至Park L）、测点与轮次标签、测点与道路的距离（单位：米）、LAeq（单位：分贝）、5类颗粒物浓度（单位：微克/立方米）、公园属性（包括规模类别、占地面积、空间开阔度、临路侧数）以及环境温湿度。

其中半数观测（共272条距离为0的道路基准测点数据）为道路基准值；剩余272条内部测点数据将用于配套论文中的回归分析。

使用本数据集时，请引用配套发表的学术论文。