A District-Level CAMS Forecast–ERA5 Reanalysis PM-Based Air-Quality Proxy and Meteorological Dataset for Rajshahi Division, Bangladesh (July 2015–December 2025)
Description
This dataset provides hourly district-level estimates of particulate-matter air quality and meteorological conditions for the eight ADM2 districts of Rajshahi Division, Bangladesh: Bogura, Chapainawabganj, Joypurhat, Naogaon, Natore, Pabna, Rajshahi and Sirajganj. It covers 1 July 2015 00:00 UTC through 31 December 2025 23:00 UTC and contains 736,704 district-hour records, with 92,088 hourly timestamps per district. Surface PM2.5 and PM10 concentrations are derived from CAMS global atmospheric-composition operational forecasts. Meteorological variables are obtained from ERA5 hourly single-level reanalysis and include temperature, dew point, relative humidity, 10 m wind components, wind speed and wind direction. Native CAMS and ERA5 grid-cell footprints were intersected with a pinned 2020 geoBoundaries BGD ADM2 boundary. Intersection areas were measured in EPSG:6933 and used as fractional weights for district-level aggregation. Values with less than 95% valid district-polygon coverage were withheld. The release contains analysis-ready hourly core and extended datasets, Bangladesh-local daily products and a convenience Excel workbook. Detailed fields record source provenance, spatial coverage, quality control, CAMS forecast initialization, lead time, source-archive identifiers and mapped IFS-COMPO cycles. PM-based indicators include trailing 24-hour AQI proxies, strict-completeness companion fields, a 12-hour PM NowCast proxy and daily PM AQI products. They apply the US EPA 2024 PM breakpoints with documented completeness rules. These values are model-derived district estimates, not ground-monitoring observations, population-weighted exposures or official regulatory AQI. Total-column CO, NO2, SO2 and O3 were excluded because they are not surface concentrations and cannot be used as station-equivalent AQI inputs. No Bangladesh ground-monitoring dataset was available for calibration or independent error validation. The complete district-time index is retained when source data are unavailable. Three documented CAMS companion-tile gaps total 2,232 source hours, and the first CAMS endpoint is unavailable. Affected PM and AQI values remain missing with explicit coverage flags and were not interpolated. CAMS is a stitched operational forecast record, not a fixed-system reanalysis. Model upgrades, particularly CY49R1 in November 2024, may introduce structural discontinuities in longitudinal analyses. The package includes CSV, Parquet and Excel products, data dictionaries, methods, quality reports, provenance records, source archives, request manifests, licences, reconstruction and validation source code, tests, file descriptions and SHA-256 checksums. These materials support transparent verification and responsible reuse.
Files
Institutions
- Bangladesh Army University of Engineering & TechnologyRajshahi Division, Rajshahi