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
The Journal of Environmental Radioactivity provides a coherent international forum for publication of original research or review papers on any aspect of the occurrence of radioactivity in natural systems.
Relevant subject areas range from applications of environmental radionuclides as mechanistic or timescale tracers of natural processes to assessments of the radioecological or radiological effects of ambient radioactivity. Papers deal with naturally occurring nuclides or with those created and released by man through nuclear weapons manufacture and testing, energy production, fuel-cycle technology, etc. Reports on radioactivity in the oceans, sediments, rivers, lakes, groundwaters, soils, atmosphere and all divisions of the biosphere are welcomed, but these should not simply be of a monitoring nature unless the data are particularly innovative.
Research papers are also included which, by either experimental or theoretical approaches, aim towards an improved understanding of the behaviour, transfer and distribution of environmental radionuclides. Predictive modelling is particularly encouraged. Papers on dating methods are acceptable if they have clear geophysical or geochemical significance. Descriptions of experimental methods should be both highly original and specifically related to determination of low-level environmental activities.
The journal provides a vehicle for objective, open and peer-reviewed publication and discussion of the more controversial aspects of environmental radioactivity, including assessments of health effects, criteria for discharge control and options for ultimate disposal of nuclear wastes. Publication in this field is also encouraged in the related book series Radioactivity in the Environment designed to complement the coverage of the journal.