The Journal Citation Reports for 2013 have been released by Thomson-Reuters, which means the new Impact Factors are out. As I have posted before, this index is a commonly-used indicator of journal quality. It’s not the only one and perhaps not even the best for JGR, but it is arguably the best known and most widely quoted. For 2012, the Impact Factor of JGR was 3.17. Note that this index does not separate the various sections of JGR but rather calculates a single value for all of the sections combined. Remember that this is calculated by taking the citations in year x to papers published in years x-1 and x-2 and dividing by the number of papers in those two years. Four numbers…that’s it.
The new JGR Impact Factor for 2013 is 3.44, an 8% increase! Fantastic! The Five-year Impact Factor also rose by a similar amount to 3.71.
By the way, with the switch to Wiley, the separate sections of JGR were given distinct ISSN numbers. This means that in a couple of years, each section of JGR will have its own Impact Factor. It will be interesting to see what this reveals. Until then, however, JGR-Space Physics is lumped in with all other sections of JGR in these and most other metrics.