SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field.
SJR is a prestige metric based on the idea that not all citations are the same. SJR uses a similar algorithm as the Google page rank; it provides a quantitative and a qualitative measure of the journal’s impact.
The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.
© Thomson Reuters Journal Citation Reports 2015
To calculate the five year Impact Factor, citations are counted in 2014 to the previous five years and divided by the source items published in the previous five years.
© Journal Citation Reports 2015, Published by Thomson Reuters
Chemie der Erde, one of the oldest journals for geochemistry-related topics, promotes broad interdisciplinary discussion on chemical problems in the geosciences, geoecology and environmental sciences. Numerous contributions by young authors have allowed the journal to retain its "young" scientific profile. Publications addressing interdisciplinary questions are particularly encouraged. The journal, through very personalized consultation and its worldwide distribution, offers entry into the world of international scientific communication. The international journal "Chemie der Erde" publishes original papers, brief news items and surveys of selected topics.