A scientist’s position within this ranking is determined based on their D-index (Discipline H-index). The D-index selectively measures scholarly impact by considering only those publications and corresponding citations within the specific discipline under examination—Environmental Sciences in this case—thus providing a precise assessment of a researcher’s influence and expertise strictly relevant to the domain.
Scope of Research and Inclusion Criteria
The ranking’s scope encompasses a comprehensive evaluative framework, beginning with the assessment of 279,971 scientist profiles identified from a diverse and large collection of bibliometric data sources spanning all scientific disciplines. Within this extensive pool, 142 scientists specializing in Environmental Sciences were specifically examined.
To qualify for inclusion in the ranking, a researcher’s D-index was required to be at least 30, with a predominant majority of their tier publications concentrated in the Environmental Sciences domain. Additionally, individual accolades and noteworthy achievements within the field were considered as complementary factors, reinforcing the overall evaluation.
The threshold D-index for identifying top researchers is calibrated in increments of 10, reflecting the estimated total number of scholars within each discipline. This approach guarantees representation of the top 1% of leading experts in Environmental Sciences. Moreover, to ensure relevance and consistency, a candidate’s general H-index and D-index values were required to have a proximity of 30% or less, maintaining alignment between their overall scientific contribution and discipline-specific impact.
Additional Verification Practices
Recognizing that raw bibliometric data alone cannot provide an absolute evaluation of scholarly excellence, the ranking team implemented a stringent manual verification process. Each scientist profile was carefully reviewed and cross-validated with publications extracted from a wide spectrum of authoritative and trustworthy sources.
While not contributing directly to ranking positions, the volume of publications in prominent journals and conference proceedings was assessed as a valuable secondary indicator of a researcher’s contribution to their specific field. The ranking position itself is firmly established through the D-index metric derived from OpenAlex and CrossRef—widely respected and comprehensive databases that are integral resources for the global research community.
For an in-depth understanding of the methodology employed in constructing this ranking, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our core mission is to inspire researchers, industry stakeholders, and policymakers worldwide to closely examine where leading experts are directing their efforts. By providing a transparent and meticulously crafted ranking platform, we aim to facilitate greater visibility of top scientists within particular disciplines, countries, and academic institutions.
This initiative seeks to foster informed decision-making, collaboration, and strategic planning within the scientific community, ultimately supporting excellence and innovation in research on a global scale.
