The phrase "homogeneity adjustments" refers to making changes or corrections to ensure fairness and similarity among different groups or items. Full definition
The GISS analysis uses the version of the GHCN without homogeneity adjustments, as adjustments are carried out independently in the GISS analysis. (climateaudit.org)
«Individual series were subject to strict daily and monthly quality control to detect anomalous values, as well as homogeneity adjustments to minimise bias introduced by non-climate-related changes, such as location, modifications to the surroundings, or the equipment itself,» says Pérez - Zanón. (sciencedaily.com)
The results over time may vary as a function of a) the input data (which change due to corrections, increasing archived data, changes in homogeneity adjustments, bias corrections etc. made by others — including the National Met Services), b) the method (all of which are documented in the various papers). (realclimate.org)