Preprints
https://doi.org/10.5194/essd-2021-303
https://doi.org/10.5194/essd-2021-303

  17 Nov 2021

17 Nov 2021

Review status: this preprint is currently under review for the journal ESSD.

A History of Open Weather in New Zealand (HOWNZ): an open access 1-km resolution monthly 1910–2019 time-series of interpolated temperature and rainfall grids with associated uncertainty

Thomas R. Etherington1, George L. W. Perry2, and Janet M. Wilmshurst1 Thomas R. Etherington et al.
  • 1Manaaki Whenua – Landcare Research, Lincoln 7608, New Zealand
  • 2School of Environment, University of Auckland, Private Bag 92019, Auckland, New Zealand

Abstract. Long time-series of weather grids are fundamental to understanding how weather affects environmental or ecological patterns and processes such as plant distributions, plant and animal phenology, wildfires, and hydrology. Ideally such weather grids should be openly available and be associated with uncertainties so that users can understand any data quality issues. We present a History of Open Weather in New Zealand (HOWNZ) that uses climatological aided natural neighbour interpolation to provide monthly 1-km resolution grids of total rainfall, mean air temperature, mean daily maximum air temperature, and mean daily minimum air temperature across New Zealand from 1910 to 2019. HOWNZ matches the best available temporal extent and spatial resolution of any open weather grids that include New Zealand, and is unique in providing associated spatial uncertainty in appropriate units of measurement. The HOWNZ weather and uncertainty grids capture the dynamic spatial and temporal nature of the monthly weather variables and the uncertainty associated with the interpolation. We also demonstrate how to quantify and visualise temporal trends across New Zealand that recognise the temporal and spatial variation of uncertainties in the HOWNZ data. The HOWNZ data is openly available at https://doi.org/10.7931/zmvz-xf30 (Etherington et al., 2021).

Thomas R. Etherington et al.

Status: open (until 12 Jan 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on essd-2021-303', Cate Macinnis-Ng, 18 Nov 2021 reply
  • RC1: 'Comment on essd-2021-303', Anonymous Referee #1, 01 Dec 2021 reply

Thomas R. Etherington et al.

Data sets

Data for A History of Open Weather in New Zealand (HOWNZ) Thomas R. Etherington, George L. W. Perry, Janet M. Wilmshurst https://doi.org/10.7931/zmvz-xf30

Model code and software

Code for A History of Open Weather in New Zealand (HOWNZ) Thomas R. Etherington https://doi.org/10.7931/yk7g-vz81

Thomas R. Etherington et al.

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Short summary
Long time-series of weather grids are fundamental to understanding how weather affects environmental or ecological patterns and processes, and ideally such weather grids should be openly available and associated with uncertainties. We present a History of Open Weather in New Zealand (HOWNZ) that openly provides monthly 1-km resolution grids of rainfall and mean, minimum, and maximum daily temperatures with associated uncertainties for New Zealand from 1910 to 2019.