On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.
Link to source page
Surface temperature anomalies (ºC) for December 2012, data is from the NOAA OISST Version 2 dataset, available at the NOAA’s Climate Data Center (ftp.cdc.noaa.gov/Datasets/noaa.oisst.v2.highres).
