The source data are versions of the International Comprehensive Ocean Atmosphere Data Set (ICOADS), which includes historical records from many sources. (skepticalscience.com)
POAMA stands for Predictive Ocean Atmosphere Model for Australia. (bom.gov.au)
The global ocean temperature analysis is primarily based on buoy and ship observations from the International Comprehensive Ocean Atmosphere Dataset (ICOADS), while monthly data updates come from the Global Telecommunications System (GTS). (ncdc.noaa.gov)