Climate Variability Datasets and Reproducible Scripts for SPEI, ENSO (Niño 3.4), and SAM Analysis (1980–2023)

This repository contains datasets and Python scripts used to analyze climate variability and drought patterns over Central Chile and Eastern Australia for the period 1980–2023. The dataset includes:- SPEI12 (Standardized Precipitation-Evapotranspiration Index)- ENSO index (Niño 3.4)- Southern Annular Mode (SAM)- ERA reanalysis data (precipitation, geopotential height Z500, and zonal wind U850) The workflow is fully reproducible and divided into two main stages:1. Dataset construction (01_dataset_build.py)2. Statistical analysis and figure generation (02_dataset_processing_calculations.py) Additional scripts reproduce atmospheric circulation diagnostics and South Pacific Subtropical High (SPSH) centroid calculations. All analyses are deterministic and can be reproduced following the provided documentation.