Examples
Worked examples
- Is an instance
A pollution-monitoring researcher deciding between ESPR and a competing environmental-chemistry journal checks the current JCR entry for each rather than relying on a remembered figure, since JIF is recalculated and re-released annually and can move meaningfully year to year -- as ESPR's own trajectory shows.
- Is an instance
A hiring or tenure committee reviewing a candidate's ESPR publication cites the journal's JIF only as one contextual data point alongside the specific paper's own citation count, in line with DORA's recommendation against using a journal-level metric as a proxy for a single article's quality.
Counter-examples
Looks similar, but isn't
- Not an instance
Treating ESPR's JIF as a fixed, permanent number is incorrect -- JCR recalculates and republishes it annually, and, as shown above, this journal's own reported figure has moved in both directions across recent release years.
- Not an instance
Using ESPR's JIF alone to judge an individual article published in the journal is a misapplication of the metric -- JIF is a journal-level average of citations to recent articles, not a per-article score; DORA and CoARA both explicitly recommend against this substitution.
Editorial commentary
Environmental Science and Pollution Research (ESPR), ISSN 0944-1344 (print) / 1614-7499 (electronic), is a Springer (Springer Nature) journal publishing peer-reviewed research on environmental chemistry, ecotoxicology, pollution monitoring, and related environmental-science subfields. Like any journal indexed in Clarivate’s Journal Citation Reports (JCR), it receives an annual Journal Impact Factor (JIF) — a ratio of citations in a given year to citable items the journal published in the two preceding years.
What the reported figures show
Third-party JCR-tracking sites that aggregate and republish Clarivate’s JCR data (Research.com, BioxBio, Resurchify) report ESPR’s JIF climbing over the 2010s and early 2020s — from around 2.6 in the 2012 JCR release to approximately 5.8 for the 2022 data year — before declining to a reported figure near 5.59 for the 2024 data year (2025 JCR release). These figures were not independently re-verified against a live jcr.clarivate.com subscription in this session and should be treated as reported/aggregator-tier rather than primary-source-confirmed; the exact decimal can also vary slightly between aggregators depending on when each last refreshed its cache. Readers who need a citation-defensible figure for a specific use (funding application, promotion file, journal-comparison decision) should pull the current number directly from Clarivate’s JCR platform or the publisher’s own journal metrics page rather than relying on an aggregator snapshot.
Why the number moves
A journal’s JIF is recalculated every year from a fresh two-year citation window, so it is expected to fluctuate with publication volume, field citation norms, and the specific cohort of articles the ratio is drawn from in any given release — a rise or fall in one release year is not, by itself, evidence of a change in editorial quality. Editors and publishers increasingly point to this normal year-to-year variability, and to the well-documented broader problems with using JIF as an assessment shortcut (see below), when discussing any single year’s movement.
Using ESPR’s JIF responsibly
Whatever the current number, the same field-wide cautions that apply to any journal’s JIF apply here. The San Francisco Declaration on Research Assessment (DORA) and the Coalition for Advancing Research Assessment (CoARA) both recommend against using a journal-level metric like JIF as a proxy for the quality of an individual article or the researcher who wrote it — a highly cited article in a lower-JIF journal, or a rarely cited article in a high-JIF one, are both common and expected outcomes of how citation distributions actually work within any journal. For a full explanation of the JIF calculation and its documented limitations across fields, see the general Journal Impact Factor entry. Researchers comparing ESPR against alternative outlets, or wanting a metric less sensitive to a two-year citation window, may also want to look at CiteScore, Elsevier/Scopus’s four-year-window equivalent, alongside JIF rather than in place of it.
Machine-readable encodings
Use in your systems
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