A scientist’s position in this ranking is fundamentally determined by their D-index (Discipline H-index), a metric that reflects a researcher's impact within a specific discipline by accounting exclusively for papers and citation metrics relevant to Environmental Sciences. This approach ensures a focused and discipline-specific evaluation of scientific contributions.
Scope of Research and Criteria for Ranking
The ranking assesses a cohort of 279,971 scientist profiles identified from a variety of bibliometric data sources spanning all scientific disciplines. Specifically, 35 scientists were identified and analyzed within the Environmental Sciences domain. To be eligible for inclusion, a scientist’s D-index had to meet or exceed a threshold of 30, with the majority of their tier publications concentrated in Environmental Sciences.
In addition to bibliometric performance, consideration was also given to scientists’ awards and achievements within the field, ensuring recognition of impactful contributions beyond citation counts. The D-index threshold is calibrated as increments of 10 depending on the estimated population size for each discipline, securing inclusion of the top 1% of leading scholars per field.
Moreover, a proximity criterion is applied whereby the general H-index and the discipline-specific D-index of a scientist must differ by no more than 30%, reinforcing disciplinary relevance in the ranking metrics.
Verification and Validation Practices
We acknowledge that raw bibliometric data alone cannot comprehensively evaluate a researcher’s scientific output. Therefore, all scientist profiles included in this ranking underwent manual verification and were cross-checked against publications listed in a wide array of trustworthy sources.
While the number of papers published in prominent journals and conference proceedings does not directly influence ranking positions, it remains an important secondary signal reflecting a scientist's contribution to their field. The ranking position itself is derived solely from the D-index values obtained from OpenAlex and CrossRef—recognized as the most prominent and widely respected bibliometric databases accessible to the research community.
For readers interested in an in-depth understanding of the methodology applied in this ranking, please visit our methodology page.
Research.com’s Mission Behind the Ranking
Research.com’s mission in compiling the Best Environmental Sciences Scientists ranking is to motivate researchers, companies, and policymakers worldwide to track the trajectories of leading experts. We aim to provide the global scientific community with transparent and reliable insights into who the foremost experts are in specific scientific domains, within various countries, and across research institutions.
By illuminating these leading contributors, Research.com aspires to foster collaboration, recognition, and informed decision-making within the scientific ecosystem. This ranking represents the result of meticulous data gathering, careful analysis, and thorough validation to offer a credible and authoritative resource for academia and beyond.
