Figure 4

Ground-measured climate warming rate in the 20th century represented by the CRU (a, Climatic Research Unit), GISS (b, Goddard Institute for Space Studies), and GHCN (c, Global Historical Climatology Network) dataset.
Ground-measured climate warming rate in the 20th century represented by the CRU (a, Climatic Research Unit), GISS (b, Goddard Institute for Space Studies), and GHCN (c, Global Historical Climatology Network) dataset.