Bibliometric data used to devise the citation-based metrics for this ranking were collected on January 12, 2026. The position of each scientist in the ranking is determined by their D-index (Discipline H-index), a specialized metric that considers only the publications and citation counts relevant to the Environmental Sciences discipline. This ensures a focused evaluation reflecting each researcher’s impact within the specific area under review.
Scope and Criteria of the Ranking
The ranking analysis incorporated 279,971 scientist profiles identified from an extensive audit of bibliometric data across all scientific disciplines. Within this dataset, 2 scientists specializing in Environmental Sciences from the Svalbard And Jan Mayen region were examined in detail.
To qualify for inclusion in the ranking, a scientist must have a D-index of at least 30 and demonstrate that a majority of their tier publications are within the Environmental Sciences domain. In addition to bibliometric performance, scientists’ awards and recognized achievements in Environmental Sciences were also factored into the evaluation.
The threshold for the D-index is not static but rather adjusted in increments of 10 based on the estimated number of scholars in each discipline, thereby ensuring robust representation of the top 1% of leading researchers. An additional quality control measure mandates that the proximity between a scientist’s overall H-index and their D-index remains at or below 30%, signaling focused scholarly impact within the discipline.
Verification and Validation Processes
Understanding the limitations of raw bibliometric data as definitive measures of scholarly output, the researchers responsible for this ranking conducted meticulous manual verification of all scientist profiles. This involved cross-referencing publication records against a broad array of trustworthy sources to authenticate the data.
While the number of publications in high-impact journals and leading conference proceedings does not influence a researcher’s position in the ranking, it serves as a valuable secondary indicator of research quality and contribution within the field.
The ranking position itself is firmly based on the D-index derived from data aggregated by OpenAlex and CrossRef, recognized as the most authoritative and widely accessible bibliometric databases available to the global research community.
For detailed insights into the full methodology underpinning this ranking, please visit our methodology page.
Research.com’s Mission and Vision
Research.com is committed to fostering transparency and recognition in the global scientific community. Our mission with this ranking is to motivate researchers, institutions, companies, and policymakers worldwide to analyze the directions leading experts are pursuing in Environmental Sciences and other disciplines.
We aim to provide a credible and comprehensive resource through which the scientific community can identify top researchers by specialty, geographic region, or research institution. This facilitates collaboration, informed decision-making, and strategic support for advancing scientific knowledge and innovation worldwide.
