Jonny Williams 

In this brief note, I show the extent of global warming, as exemplified by sea surface temperature - SST - around New Zealand from 1982-2015. We use 16 members of the UKESM historical simulations from the sixth Assessment Report of the Intergovernmental Panel On Climate Change. These model data are compared to ground truth data from three observational datasets. All data is plotted with respect to the values at the beginning of 1982 for each dataset considered, the date from which all three observational products are available. All data used in this work is freely and publicly available. The three datasets show noticeably different results in the magnitude of their respective warming signals and this has important ramifications for how model-data comparisons are assessed for island nations with a predominantly maritime climate.