Sea Surface Temperature
A Daily Microwave Optimally Interpolated SST (MW OI SST) is now available:
The MW OI SSTs:
|are derived from microwave radiometer SSTs (AMSR-E, TMI), which can see through clouds.
|provide good temporal resolution, especially important in areas with persistent cloud cover.
|represent night-time minimum, or pre-dawn SST values; diurnal warming has been estimated and removed.
|are gridded at quarter degree (~25 kilometer) resolution.
What is Sea Surface Temperature?
See Characterizing Sea Surface Temperature on the GHRSST-PP site for a good discussion of thermal variability in the upper ocean. The MW OI SSTs can be said to represent pre-dawn temperatures at a depth of ~1 meter, or temperatures just below the diurnal layer.