Mean and extreme precipitation over Aotearoa New Zealand: A comparison across multiple different estimation techniques

This study provides a comprehensive evaluation of mean and extreme precipitation features over Aotearoa New Zealand (hereafter or NZ) in station data six merged satellite-gauge products, five reanalyses two situ gridded products period 10 years inclusive (2001–2010). All show similar pattern with clear maximum alpine regions. However, only the higher spatial resolution datasets capture details west–east gradient across South Island accurately. For extremes, we used set climate indices to examine wet tail distribution different products. The have significant differences these indices, especially West Coast Island, indicating substantial uncertainty extremes. Overall, MSWEP BARRA-R perform well all statistical tests, including values nonparametric Kling Gupta efficiency (NP-KGE) metric, favouring their utility for capturing main characteristics both Zealand.