To ensure accuracy and currency, all citation-based metrics utilized in the ranking were collected on January 12, 2026. The ranking employs the D-index (Discipline H-index) as its core metric, which strictly accounts for papers and citation counts within the examined discipline—Earth Science in this instance—thereby providing a more precise representation of a researcher's impact in the field.
Scope and Criteria of the Ranking
The comprehensive evaluation encompassed 279,971 scientist profiles drawn from a diverse array of bibliometric data repositories, spanning all scientific disciplines globally. Within the Earth Science domain specifically, 1,254 scientists were examined for inclusion in the ranking.
Eligibility criteria stipulated a minimum D-index of 30 within Earth Science. Furthermore, to qualify, a majority of a scientist’s tier publications had to fall squarely within the Earth Science discipline. Consideration was also given to notable awards and achievements related to Earth Science research, supplementing the bibliometric evaluation.
The threshold of the D-index for identifying top researchers is adjusted in increments of 10 relative to the estimated total number of scholars per discipline. This calibration ensures inclusion of the top 1% of leading scholars in each field. Additionally, the ranking mandates a proximity of no more than 30% between a scientist’s general H-index and their discipline-specific D-index, reinforcing the focus on specialized impact.
Verification and Validation Practices
Recognizing that raw bibliometric data alone cannot provide a definitive assessment of scholarly output, the Research.com team undertook meticulous manual verification of each scientist profile. Cross-correlation was performed against publications indexed in a wide spectrum of trustworthy sources to validate authorship and disciplinary relevance.
While not directly influencing the ranking position, the quantity of papers published in prestigious journals and major conference proceedings was considered a valuable secondary indicator of a scientist’s scholarly contributions within Earth Science.
To reiterate, the authoritative position in the ranking is ultimately established through each researcher’s D-index calculated from data sourced primarily from OpenAlex and CrossRef.
For an in-depth understanding of the methodology underpinning this ranking, please refer to our methodology page.
Research.com’s Mission and Vision
Our mission at Research.com is to inspire researchers, industry leaders, policymakers, and academic institutions worldwide to identify and engage with leading experts in various scientific domains. By providing transparent, rigorous, and data-driven rankings, we aim to illuminate the trajectories of top researchers across countries, specific fields of study, and research institutions.
Through this benchmarking effort, the scientific community gains a valuable compass to recognize excellence, foster collaborative opportunities, and inform strategic decisions that advance the frontiers of knowledge globally.
