These two datasets are blended into a single product to produce the combined global land and ocean temperature anomalies. (ncdc.noaa.gov)
The year 2010 tied with 2005 in all three global - scale components: the global land temperature, the global ocean temperature, and the global land and ocean surface temperature. (noaanews.noaa.gov)
But there do seem to be significant discrepancies in differential rates of warming between land and ocean in the three surface data sets. (realclimate.org)