5 Year Impact Factor & Ranking

3.6 2.7 1.8 0.9 3.2 2016 2017 2018 2019 2020 3.2 2016 2017 2018 2019 2020
  • 1 135
    #45
  • 1 130
    #28
  • 1 229
    #96
  • 1 85
    #36
  • 1 135
    #48
  • 1 127
    #33
  • 1 231
    #92
  • 1 85
    #38
  • 1 137
    #58
  • 1 128
    #50
  • 1 236
    #126
  • 1 86
    #46
  • 1 138
    #57
  • 1 129
    #44
  • 1 241
    #117
  • 1 87
    #44
  • 1 142
    #61
  • 1 133
    #43
  • 1 264
    #136
  • 1 92
    #46

About 5 Year Impact Factor & Ranking

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

Metrics

Year I.F. Engineering, chemical Engineering, mechanical Environmental sciences Meteorology & atmospheric sciences
2020 3.200 61/142 43/133 136/264 46/92
2019 57/138 44/129 117/241 44/87
2018 58/137 50/128 126/236 46/86
2017 48/135 33/127 92/231 38/85
2016 45/135 28/130 96/229 36/85

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.