Fluctuations in ocean and atmospheric circulation happen on many scales — and include 20 - 30 year regimes in global surface temperature trends — and in sea surface temps in the eastern Pacific. (watertechbyrie.com)
In the past, the GISTEMP science team sometimes posted more detailed discussions about global surface temperature trends. (data.giss.nasa.gov)
Internal variability has always been superimposed on top of global surface temperature trends, but the magnitude - as well as the fingerprints - of current warming clearly indicates that anthropogenic greenhouse gases are the dominant factor. (skepticalscience.com)