A scientist's position within the ranking is determined by their D-index (Discipline H-index), a specialized metric that considers only the papers and citation impact relevant to the specific discipline under examination—in this case, Earth Science. This focused approach allows for a precise assessment of a researcher’s influence within their core area of expertise.
Scope of Research and Eligibility Criteria
The ranking is based on an extensive review of 279,971 scientist profiles identified from a diverse array of bibliometric databases across all disciplines. From this broad dataset, a subset of 40 scientists specializing specifically in Earth Science was carefully examined for inclusion.
To qualify for the ranking, a scientist must meet stringent criteria: their D-index must be at least 30, and the majority of their tier publications must be in the domain of Earth Science. Additionally, recognized awards and notable achievements within Earth Science were incorporated as supplementary indicators of scholarly influence.
The D-index threshold is calibrated as increments of 10, in accordance with the estimated total number of scholars in each discipline. This scaling guarantees that the ranking consistently includes the top 1% of leading experts while maintaining a rigorous standard. Furthermore, eligibility requires that the gap between a researcher’s general H-index and their D-index does not exceed 30%, ensuring that their disciplinary impact closely aligns with their overall scientific contribution.
Additional Verification Practices
Recognizing the limitations inherent in relying solely on raw bibliometric data, the Research.com team conducted manual verification of all scientist profiles included in the ranking. Profiles were cross-correlated against publications listed in a broad array of trustworthy and authoritative sources to ensure accuracy.
While the number of papers published in prominent journals and conference proceedings does not directly affect a researcher’s ranking position, it serves as a valuable secondary signal of their contribution and standing within the Earth Science community.
The primary basis for the ranking remains each researcher’s D-index, which is calculated using data from OpenAlex and CrossRef—two of the most comprehensive and well-regarded bibliometric databases accessible to the global research community.
For a detailed understanding of the methodology underpinning this ranking, we invite you to visit our methodology page.
Research.com’s Mission
Our mission at Research.com is to inspire researchers, industry leaders, policymakers, and academic institutions worldwide by illuminating where leading experts in various disciplines are conducting groundbreaking work. By providing transparent and meticulously curated rankings, we aim to facilitate connections within the global scientific community and help stakeholders identify top experts in specific areas of study, whether by country or within individual research institutions.
This ranking represents our ongoing commitment to fostering excellence and collaboration in Earth Science research through rigorous, data-driven evaluation combined with thoughtful verification, ensuring credibility and trustworthiness for the academic community.
