Category Archives: Science

A comparison of HadCRUT4.6 using Icosahedral binning

The classic HadCRUT processing calculates average surface temperatures on a 5×5 grid in Latitude and Longitude. To calculate the global average a spatial weighting of cos(Lat) must be applied. The main advantage of using a more complex 3D Icosahedral grid … Continue reading

Posted in AGW, Climate Change, climate science, CRU, Hadley | 3 Comments

V4C August Temperature and the size of V4 adjustments

Only GHCN-V4 is currently available for August. V3 has not been updated since 17th August so I wondered if it had perhaps been discontinued, but it turns out they have had  IT problems. My calculation of the latest V4C combined … Continue reading

Posted in AGW, climate science, NOAA | Tagged | 15 Comments

HadSST4 and knock on effects

The new version of the HadSST4 has reassigned ship based  measurements from before WW II  into the early 1990s. Bias adjustments depend on the fraction of measurements using wooden or canvas buckets and engine room intakes (ERI), which are partly … Continue reading

Posted in AGW, Climate Change, climate science, CRU, UK Met Office | Tagged | 15 Comments