skotikot/Spatial-Temporal-Rainfall-Analysis

Replication code for Kotikot et al. (2024) in Scientific Reports. Processes multi-decadal precipitation grids across Kenya to analyze sub-seasonal anomalies, monthly climatologies, and time-frequency climate driver teleconnections using Wavelet Coherence. # Spatial-Temporal-Rainfall-Analysis Replication code for for the national and county-level climate trend analysis featured in **Kotikot et al. (2024), Scientific Reports**. The codebase processes multi-decadal blended satellite-gauge precipitation products (1981–2021) across Kenya to isolate sub-seasonal anomalies, compute localized monthly climatologies, and map time-frequency patterns of ocean-atmospheric driver teleconnections using Continuous Wavelet Transforms (CWT) and Wavelet Coherence (WCT). --- ## Directory Structure To ensure the scripts execute correctly, organize your local project root folder (`/`) as follows. The underlying raster grids and time-series arrays must be retrieved from the accompanying **Zenodo Dataset** and unpacked directly into the `/Data` directory. ```tree . ├── Scripts/ │ ├── monthly_rainfallCompositing.ipynb # National grid aggregation, masking, and seasonal compositing pipeline │ └── temporalRain_wavelet.ipynb # Wavelet transform, cross-wavelet power, and climate index coherence engine │ ├── Data/ │ ├── Raw/ │ │ ├── national_boundary/ # Spatial shapefiles (.shp) for Kenya administrative boundaries │ │ └── county_boundary/ # Spatial shapefiles for Narok County and specific sub-regions │ │ └── chirpsKenya_monthlySums_1981_2021_AgZnExtent2.nc # NetCDF file containing calculated long-term 40-year monthly precipitation means │ │ └── nino34raw_2.csv # Nino 3.4 time series indices │ │ └── IODtimeseries_.csv # Indian Ocean Dipole Mode (IOD) time series indices │ │ │ └── Processed/ │ | ├── Climatology/ │ | │ └── KenyaAgroEcoZones_..._chirpsCellsize*.tif # Sptail layers matching the spatial resolution and extent of CHIRPS rainfall data. These define various agro-climatic zones (E.g., arid, humid) │ | | | | └── Figures/ …