Ranking positions are determined by aggregating the D-indexes (Discipline H-index) of all included scholars affiliated with each institution, provided their primary research area is Environmental Sciences. The D-index is a rigorous discipline-specific variant of the well-established H-index, drawing exclusively on publications and citation data within the relevant field to ensure accurate representation of scholarly influence and productivity.
Scope of Research and Evaluation Criteria
This ranking incorporates an extensive analysis of 279,971 scientist profiles sourced from a variety of bibliometric data repositories. Specifically, 17,263 scientists whose principal research focus is Environmental Sciences were subject to detailed evaluation.
To qualify for consideration, scholars were required to meet a minimum D-index threshold of 30, with the majority of their significant publications categorized under Environmental Sciences. Furthermore, the evaluation algorithm increments the D-index threshold by 10 depending on the scale of each discipline's academic community to ensure that the top 1% of leading scholars are represented in the final list. To maintain disciplinary focus, a proximity of 30% or less between a scientist's general H-index and their D-index was enforced.
In addition to quantitative bibliometric measures, the ranking framework accounts for a researcher's awards and achievements in Environmental Sciences as supplementary distinguishing factors, ensuring comprehensive evaluation of scholarly impact and recognition.
Verification and Data Integrity
The Research.com team recognizes the limitations inherent to raw bibliometric data and does not treat quantitative indicators as an absolute measure of scholarly output or impact. Accordingly, all scientist profiles in the ranking underwent manual verification to confirm accuracy, and were cross-referenced across multiple trusted publication databases.
Although the number of publications in prominent journals and conference proceedings is not directly factored into the ranking itself, it is recognized as an essential secondary indicator of scholarly contribution and research leadership.
Ranks are established on the basis of each researcher's H-index, according to records from OpenAlex and CrossRef—currently the most prominent, comprehensive, and reliable bibliometric data sources available to the research community.
For more detailed information regarding the methodologies employed, readers are encouraged to visit our methodology page.
Research.com’s Mission
Our mission is to foster informed engagement among scientists, business leaders, and policymakers worldwide by illuminating the trajectories of top experts in Environmental Sciences. Research.com strives to facilitate discovery and knowledge exchange, enabling the global academic community to identify leading experts by discipline, country, or institution. Through our rankings, we aim to provide clarity and promote excellence in research by highlighting those who are shaping the future of Environmental Sciences.
Key Results of the 4th Edition Ranking
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Top 3 institutions in Taiwan by number of leading scientists in Environmental Sciences:
- National Taiwan University (11 scientists)
- National Central University (3 scientists)
- National Cheng Kung University (2 scientists)
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Global prominence: The world's most distinguished scholars in Environmental Sciences represent: California Institute of Technology, Harvard University, Rice University, University of Almería, University of Helsinki, Korea University, University of East Anglia, University at Albany (SUNY), Pennsylvania State University, and University of Colorado Boulder.
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Leading scholars:
- Professor P. Ciais (French Alternative Energies and Atomic Energy Commission, CEA) – D-index: 207
- John H. Seinfeld (California Institute of Technology) – D-index: 194
- Daniel J. Jacob (Harvard University) – D-index: 191
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Institutional averages for the top 1-5%:
- Average total D-index for the top 5% universities: 2061 (vs. average of 318 across all 1001 institutions)
- Average number of published articles by affiliated scientists in the top 5%: 7534 (vs. 1185 for all universities)
- Average citations per researcher in the top 1% universities: 279,971 (vs. 83,066 for all 1001 universities)
With the careful combination of exhaustive data sourcing, rigorous evaluation, and thorough manual verification, the 4th edition of the Research.com Best Environmental Sciences Universities in Taiwan Ranking presents a credible and nuanced perspective on institutional and scholarly excellence in Environmental Sciences.
