2022
DOI: 10.1175/mwr-d-22-0059.1
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An Objective Weather Regime Classification for Aotearoa New Zealand Using a Two-Tiered K-Means Clustering Approach

Abstract: Weather regimes (WRs), also known as synoptic types, are defined as recurrent patterns that have been used to categorize variability in atmospheric circulation. However, defining the optimal number of patterns can often be arbitrary, and there are common shortcomings when oversimplifying a wide range of synoptic conditions and weather outcomes. We build on previous work that has defined regional WRs and objectively ascribe an optimal number of once-daily weather patterns for Aotearoa New Zealand (ANZ) using af… Show more

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Cited by 3 publications
(1 citation statement)
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“…ERA5 is generally considered among the best global modern reanalysis products, with considerably higher horizontal and vertical atmospheric model resolution combined with state‐of‐the‐art data assimilation procedures (Hersbach et al., 2020). Various recent studies have evaluated the performance of ERA5 across the New Zealand region, including in the context of the Southern Annular Mode (Marshall et al., 2022), synoptic circulation regimes (Rampal, Lorrey, & Fauchereau, 2022), and downscaling of precipitation extremes (Rampal, Gibson, et al., 2022).…”
Section: Methodsmentioning
confidence: 99%
“…ERA5 is generally considered among the best global modern reanalysis products, with considerably higher horizontal and vertical atmospheric model resolution combined with state‐of‐the‐art data assimilation procedures (Hersbach et al., 2020). Various recent studies have evaluated the performance of ERA5 across the New Zealand region, including in the context of the Southern Annular Mode (Marshall et al., 2022), synoptic circulation regimes (Rampal, Lorrey, & Fauchereau, 2022), and downscaling of precipitation extremes (Rampal, Gibson, et al., 2022).…”
Section: Methodsmentioning
confidence: 99%