Unless specifically stated otherwise, the temperature data I use in this book is a combination of two station methods and two satellite methods. Specifically I use the CRU (5), GHCN (6) station methods and the UAH (7) and RSS (8) satellite methods. In this way I incorporate the modern, more sensitive satellite method with the longer period of the station method. So any data past 1979 includes data from all 4 methods. I call the set I use the blended method in the book and on my website to make it clear that is a hybrid temperature set.
