Yet it is clear from BoM that
sea surface temperature trends around Australia broadly match the land trends, and elsewhere you have asserted that evaporation is part of the «browning» problem.
For this reason, a number of researchers have suggested that it should be possible to estimate the long
term Sea Surface Temperature trends for a given area by averaging together all the available measurements from different voyages that went through that area in a given month.
The government dataset, called the National Oceanic and Atmospheric Administration's Extended Reconstructed Sea Surface Temperature version 4, increased
the sea surface temperature trend estimate over the last 18 years from 0.07 ° Celsius per decade to 0.12 ° Celsius per decade, partly because of adjustments for different types of measuring instruments.