A scientist’s position in the ranking is determined by their D-index (Discipline H-index), a metric that specifically accounts for citation impact within the examined discipline. Unlike a general H-index, the D-index focuses exclusively on publications and citations in Earth Science, thereby providing a refined and discipline-relevant measure of scholarly influence.
Scope of Research and Qualification Criteria
The ranking evaluates a total of 279,971 scientist profiles identified from a broad spectrum of bibliometric databases spanning all scientific disciplines. Within this comprehensive dataset, 753 scientists specializing in Earth Science were specifically examined.
To qualify for inclusion in this ranking, a scientist must meet a minimum D-index threshold of 30. Moreover, a majority of their tier publications must be in the field of Earth Science, ensuring disciplinary relevance. Additional consideration is given to awards and notable achievements within the Earth Science community, further substantiating recognized expertise.
The D-index threshold is calibrated in increments of 10 according to the estimated population of scholars within each discipline, ensuring that approximately the top 1% of leading scholars are incorporated into the ranking. Furthermore, eligibility requires that the difference between a researcher’s general H-index and their D-index does not exceed 30%, maintaining close alignment between overall and discipline-specific impact metrics.
Verification Practices and Methodological Rigor
Recognizing that raw bibliometric data alone cannot comprehensively capture the quality and impact of scholarly output, the Research.com team undertakes exhaustive manual verification of all scientist profiles included in the ranking. Each profile is carefully cross-correlated against publications listed in a wide array of credible and well-established sources.
Although the number of papers published in high-impact journals and conference proceedings is not a direct factor in determining a researcher’s rank, it serves as an important secondary indicator of a scientist’s contribution to their field.
The final ranking positions are established exclusively based on the D-index derived from data primarily retrieved from OpenAlex and CrossRef. These platforms represent the most prominent and trusted bibliometric databases currently accessible to the research community worldwide.
For a detailed overview of the methods and criteria employed in constructing this ranking, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision
Research.com is committed to catalyzing a global dialogue among researchers, academic institutions, industry stakeholders, and policymakers by illuminating the trajectories of leading experts across diverse scientific domains. Our rankings serve as an objective and transparent vehicle for showcasing who the foremost thought leaders are within specific fields, geographic regions, and research organizations.
By providing an authoritative resource grounded in meticulous data collection and validation, we aim to foster informed decision-making, strengthen collaborations, and ultimately accelerate scientific progress worldwide.
