A scientist’s position in the ranking is determined by their D-index (Discipline H-index), a refined variant of the traditional H-index. The D-index exclusively includes publications and citation metrics relevant to the Earth Science discipline under review, thus offering a more precise measure of disciplinary impact.
Scope and Criteria of Research Considered
The ranking methodology entailed a rigorous examination of 279,971 scientist profiles identified through diverse bibliometric databases spanning all academic disciplines. Among these, 8 Earth Science specialists in Iran met the stringent criteria established for this list.
To qualify for inclusion, a scientist’s D-index had to be a minimum of 30, reflecting a high threshold of influence within Earth Science. Furthermore, the majority of their tier publications needed to be substantively rooted in Earth Science research. In addition to bibliometric measures, professional recognition in the form of awards and notable achievements within the field was also incorporated as a qualitative factor.
The D-index threshold is dynamically calibrated, increasing in increments of 10 relative to the estimated total number of scholars per discipline, while ensuring inclusion of the top 1% of leading experts. This adaptivity balances inclusiveness with exclusivity. Another important qualification is that the proximity between a scientist’s overall H-index and their D-index must not exceed 30%, preserving the disciplinary focus of the ranking.
Additional Verification and Robustness Measures
Recognizing the limitations inherent in raw bibliometric data as an absolute evaluative tool, the Research.com team applied rigorous manual verification to all scientist profiles. Extensive cross-correlation of publication records was performed against a broad spectrum of trustworthy and high-quality sources to affirm accuracy and relevance.
While the number of publications in prominent journals and conference proceedings does not directly influence the ranking position, it serves as a valuable secondary indicator of a scientist’s substantive contributions to Earth Science research.
The conclusive positions in the ranking derive from each researcher’s D-index, meticulously computed using data from OpenAlex and CrossRef—two of the foremost and most widely recognized bibliometric databases available to the global research community. For detailed information about the comprehensive methodology behind this ranking, we invite readers to visit our methodology page.
Research.com’s Mission and Vision Behind the Ranking
At Research.com, our mission is to inspire researchers, academic institutions, policymakers, and industry leaders worldwide to examine emerging trends and trajectories among leading experts. By identifying and spotlighting top scientists within specific disciplines, countries, and research institutions, we provide the scientific community with a transparent, credible, and accessible resource to better understand who the leading contributors are in a given area of study.
This ranking embodies our commitment to fostering collaboration, recognition, and informed decision-making within the global Earth Science community and beyond, supporting the advancement of knowledge through meticulous, data-driven scholarship assessment.
