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oai:data.mendeley.com/kh5sy694hp.1 2026-10-07T10:33:22Z

Shuvo, Md. Kamruzaman A District-Level CAMS Forecast–ERA5 Reanalysis PM-Based Air-Quality Index Proxy and Meteorological Dataset for Khulna Division, Bangladesh (July 2015–December 2025) Mendeley Data This dataset provides a district-level PM-based Air-Quality Index proxy and meteorological record for Khulna Division, Bangladesh, covering July 2015 to December 2025. It was developed for the ten districts of Khulna Division: Bagerhat, Chuadanga, Jashore, Jhenaidah, Khulna, Kushtia, Magura, Meherpur, Narail, and Satkhira. The dataset combines CAMS global atmospheric composition forecast data with ERA5 reanalysis meteorological data. CAMS surface PM2.5 and PM10 fields were used to derive particulate-matter-based air-quality proxy indicators, while ERA5 supplied supporting meteorological variables including temperature, dew point, relative humidity, wind speed, wind direction, and U/V wind components. Gridded model outputs were aggregated to district level using area-weighted intersections with geoBoundaries ADM2 district polygons. The final release contains 920,880 hourly district records and 38,380 Bangladesh local-date daily records. Each district has 92,088 hourly timestamps. The dataset includes hourly PM2.5 and PM10 concentrations, rolling 24-hour PM-based index proxies, strict completeness companion indices, NowCast-based PM proxy indices, daily summaries, meteorological variables, quality flags, source provenance, and reproducibility materials. Known CAMS early-period lead-zero PM placeholder gaps were carefully handled. Validated previous-day CAMS forecast step-24 records were integrated only when exact valid-time source data were available and spatial coverage requirements were satisfied. This process recovered 7,469 district-hour records per pollutant. After recovery, 721 PM2.5 and 721 PM10 concentration cells remain blank. These remaining blanks represent unavailable source data and were not interpolated, estimated, or zero-filled. The air-quality values in this dataset should be interpreted as model-derived PM-based proxy indicators, not as official regulatory AQI, ground-monitor observations, or population-weighted exposure estimates. The dataset is intended to support transparent research on long-term particulate air-quality patterns, district-level meteorological conditions, environmental exposure screening, and regional air-quality studies in Khulna Division. Provenance files, quality-control outputs, data dictionaries, boundary files, reproducible code, and checksum records are included to support verification and reuse. Air Quality Akas, Mostafizur Rahman Tonmoy , Mehedi Hasan Dataset doi:10.17632/kh5sy694hp.1 oai:data.mendeley.com/kh5sy694hp.1 Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 https://data.mendeley.com/datasets/kh5sy694hp 2026-10-07T10:33:22Z