Daily interpolated rainfall fields over Martinique at 1 km resolution, 1950-2024

This dataset provides daily interpolated precipitation fields over Martinique (French West Indies) from 1 January 1950 to 31 December 2024. The dataset contains 27,394 daily precipitation fields on a regular 1 km spatial grid covering Martinique. The grid contains 54 x 46 cells, with values outside the interpolation domain stored as missing values. The product was derived from historical daily rain-gauge observations from Météo-France and the ORSTOM-DIREN rainfall archive. After data cleaning and station harmonisation, the reconstruction procedure used observations from 88 meteorological stations distributed across Martinique. Missing observations in the station time series were first reconstructed using an XGBoost regression approach based on information from the other rain gauges. The completed station dataset was then used for spatial interpolation by kriging. Daily rainfall patterns were classified into five rainfall groups using principal component analysis and hierarchical agglomerative clustering. The group assigned to each day is included in the dataset. The full dataset production protocol is described in the author's Masters thesis (to be published). The NetCDF file contains the following main variables: RR: interpolated daily precipitation field variance: kriging variance associated with the interpolated precipitation field group: rainfall group assigned to each day crs: coordinate reference system information The spatial dimensions are x and y, and the temporal dimension is time. The dataset follows CF-1.10 metadata conventions. This dataset is intended for climatological, hydrological, environmental and agronomic applications requiring spatially continuous daily rainfall information over Martinique. Temporal coverage1950-01-01 to 2024-12-31 Temporal resolutionDaily Number of time steps27,394 Geographical coverageMartinique, French West Indies, Lesser Antilles, Caribbean Spatial reference systemWGS 84 / UTM zone 20N EPSG codeEPSG:32620 Coordinate unitsmetres Spatial resolution1 km Grid dimensions54 x 46 grid cells Data formatNetCDF Metadata conventionCF-1.10