A scientist’s position in the ranking is determined by their D-index (Discipline H-index), a refined metric that exclusively considers papers and citations within the specific discipline under evaluation—in this case, Earth Science. This discipline-focused approach ensures that the ranking accurately reflects a researcher’s impact within their area of expertise.
Scope of Research and Qualification Criteria
The ranking process examined a total of 279,971 scientist profiles aggregated from a variety of bibliometric data sources across all disciplines. Within Earth Science specifically, 9 scientists meeting stringent criteria were identified for inclusion in the ranking.
To qualify for this specialized list, a researcher’s D-index had to be at least 30, ensuring recognition of substantial scholarly contribution. Additionally, the majority of a qualifying scientist’s tier publications had to be rooted in Earth Science. Beyond quantitative bibliometric criteria, the assessment also took into account the researcher’s awards and achievements within the field, providing a qualitative complement to the ranking.
The threshold for the D-index is calibrated thoughtfully as increments of 10, relative to the estimated total number of scholars within each discipline. This threshold is designed to guarantee that the top 1% of leading scientists in Earth Science are incorporated into the ranking. Furthermore, to ensure disciplinary relevance, there is a required proximity of no more than 30% difference between a scientist’s general H-index and their D-index.
Additional Verification Practices
Recognizing that raw bibliometric data is never an absolute measure of scholarly output, the researchers behind the ranking have implemented rigorous manual verification protocols. Each scientist profile was carefully reviewed and cross-correlated against a diverse range of trustworthy publication sources to validate accuracy and relevancy.
Although the number of papers published in prominent journals and conference proceedings does not directly influence the position in Research.com rankings, this metric serves as a valuable secondary indicator of a researcher’s contribution to the specific scientific domain.
The primary ranking position is established using each researcher’s D-index ascertained from data harvested through OpenAlex and CrossRef, which remain the most prominent and widely respected bibliometric databases accessible to the research community. For detailed insights into the underlying processes, criteria, and data handling practices, readers are encouraged to visit our methodology page.
Research.com’s Mission and Agenda
Research.com’s mission behind the creation of this ranking is to motivate researchers, academic institutions, companies, and policymakers worldwide to closely examine the trajectories of leading experts within scientific disciplines. By transparently highlighting the top scholars in specific areas—whether by country, research institution, or specialization—the ranking facilitates greater recognition, collaboration, and informed decision-making across the scientific community.
Through meticulous data collection, verification, and discipline-specific analysis, Research.com aims to foster a landscape where excellence is recognized and accessible, empowering the global science ecosystem to advance knowledge and innovation collectively.
