The bibliometric data leveraged to derive the citation-based metrics for this ranking were collected on January 12, 2026. A key metric used to establish each scientist's position in the ranking is the D-index (Discipline H-index), a refined variant of the traditional H-index that specifically accounts for papers and citations within the examined discipline—in this case, Earth Science. This focus on discipline-specific impact ensures a more accurate reflection of researchers’ contributions to their field.
Scope of Research and Inclusion Criteria
The ranking evaluates a total of 279,971 scientist profiles identified through an extensive integration of bibliometric data sources covering all disciplines. Within this broad pool, 2,953 scientists specializing in Earth Science were carefully examined.
To qualify for inclusion in the ranking, a scientist’s D-index needed to be at least 30, and a majority of their tier publications had to be directly within the realm of Earth Science. In addition to bibliometric criteria, scientists’ awards and significant achievements within the Earth Science discipline were taken into account to supplement the quantitative evaluation.
The D-index threshold for consideration is established as increments of 10, scaled according to the estimated total number of scholars within each discipline. This approach guarantees inclusion of the top 1% of leading scholars while maintaining proportional representation. Furthermore, to ensure the D-index represents a genuine disciplinary focus, only candidates exhibiting a proximity of 30% or less between their general H-index and their Earth Science-specific D-index were considered.
Verification and Validation Procedures
The researchers compiling this ranking recognize that raw bibliometric data alone cannot serve as an absolute measure of scholarly performance. Consequently, each scientist's profile underwent meticulous manual verification, including cross-correlation against publications indexed in a broad array of trustworthy and reputable sources.
Although the number of publications in prominent journals and conference proceedings is not a direct factor in determining position within the Research.com ranking, it remains an important secondary indicator of a scientist’s impact and contribution to Earth Science research.
The ranking itself is established based on the D-index values derived from information aggregated primarily from OpenAlex and CrossRef, which stand as the most prominent and reliable bibliometric databases accessible to the research community.
For more detailed information regarding the methodology applied in the creation of this ranking, we encourage readers to visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission is to inspire researchers, corporations, and policymakers worldwide to examine the trajectories of leading experts in their respective fields. Through this ranking, we aim to provide the global scientific community, including academia and industry stakeholders, with transparent and thorough insights into who the leading Earth Science experts are—not only nationally, but also within specific institutions.
By delivering rigorously curated and validated rankings, we seek to foster collaboration, promote excellence, and support informed decision-making that can shape the future of scientific research and innovation worldwide.
