Individual research journals are evaluated with regard to their influence within a specific research field and given a Journal Impact Factor (JIF). The higher the JIF the higher ranking of the journal. Clarivate's Journal Citation Reports (JCR) contains information on this evaluation of international research journals that are indexed in Web of Science (WoS) from 2006 to the present. Information on journals indexed in WoS is found in Master Journal List.
Other useful lists for scientific journals are:
A traditional way to assess the visibility and impact of scientific writing, within a field, is to calculate an impact factor for individual authors. Impact factors are an important part of evaluating the research contribution of faculty members.
The best-known impact factor is the h-index which is available in several versions. It is easy to calculate the h-index of individual authors in Web of Science (WoS). Master Journal List provides information on journals indexed in WoS. Anne-Will Harzing, professor at the University of Melbourne Australia, has developed the software Publish or Perish which facilitates comparable analysis from Google Scholar. The software can be downloaded free of charge. It is advisable to begin by looking at Google Scholar Citations. Other impact factors are the g-index and the i10-index.
Altmetric is a system that tracks the attention that research outputs such as scholarly articles and datasets receive online. It pulls data from Social media like Twitter, Facebook, and Google+, traditional media - both mainstream (The Guardian, New York Times) and field-specific (New Scientist, Bird Watching), blogs - both major organisations (Cancer Research UK) and individual researchers and Online reference managers like Mendeley and CiteULike.
More on impact factors and evaluation of scientific writing