Since its inception, Scopus has tracked the citations of articles written in 1996 and after. Thus, articles written before 1996 were not included in one’s h-index. That is now changing. Earlier in the year, Scopus began to add cited references starting in 1970. This is a multi-year project, but changes are already apparent.
In November, Scopus began to include this new content. Now with more pre-1996 cited references, the h-index of authors who published before 1996 have the potential to increase. As more of this content is added, these h-index counts will only become more reflective of the authors work.