5 Year Impact Factor & Ranking

8.0 6.0 4.0 2.0 6.233 2016 2017 2018 2019 2020 6.233 2016 2017 2018 2019 2020
  • 1 153
    #35
  • 1 347
    #27
  • 1 229
    #50
  • 1 105
    #14
  • 1 150
    #26
  • 1 342
    #24
  • 1 231
    #39
  • 1 104
    #14
  • 1 155
    #24
  • 1 346
    #27
  • 1 236
    #36
  • 1 108
    #16
  • 1 159
    #25
  • 1 348
    #30
  • 1 241
    #49
  • 1 111
    #18
  • 1 159
    #23
  • 1 361
    #35
  • 1 264
    #53
  • 1 124
    #20

About 5 Year Impact Factor & Ranking

Impact Factor based on 5 years of history. Copyright Clarivate Analytics.

Metrics

Year I.F. Ecology Economics Environmental sciences Environmental studies
2020 6.233 23/159 35/361 53/264 20/124
2019 25/159 30/348 49/241 18/111
2018 24/155 27/346 36/236 16/108
2017 26/150 24/342 39/231 14/104
2016 35/153 27/347 50/229 14/105

Definition

Impact Factor

A base of five years may be more appropriate for journals in certain fields because the body of citations may not be large enough to make reasonable comparisons, or it may take longer than two years to publish and distribute leading to a longer period before others cite the work.

Actual value is intentionally only displayed for the most recent year. Earlier values are available in the Journal Citation Reports from Clarivate Analytics.

ISI ranking

Journals are often ranked by Impact Factor in an appropriate Clarivate Analytics subject category. As there are now two Impact Factors published – two-year and five-year Impact Factors – this rank may differ, so care is needed when assessing these ranked lists to understand which of the two metrics is being used. In addition, journals can be categorized in multiple subject categories, giving them different ranks for each subject. Consequently, a rank should always be in context to the subject category.