The ranking position of each scientist is determined based on their D-index (Discipline H-index), a specialized metric that evaluates a researcher's impact within a specific discipline by including only publications and citations directly related to Environmental Sciences. This focused approach ensures that the ranking reflects expertise and influence within the field.
Scope of Research and Selection Criteria
An initial pool of 279,971 scientist profiles identified across diverse bibliometric data sources was examined comprehensively across all scientific disciplines. From this comprehensive set, 446 scientists specializing specifically in Environmental Sciences were shortlisted for consideration in the ranking.
To qualify for inclusion, a scientist was required to have a D-index of at least 30 with a majority of their tier publications concentrated in the Environmental Sciences domain. Additionally, notable awards and professional achievements in Environmental Sciences were factored into the evaluation to complement citation metrics.
The threshold for the D-index varies incrementally by 10 points depending on the estimated total number of scholars in each discipline, ensuring that the top 1% of leading scholars per field are represented in the list. Moreover, a close alignment—specifically, a proximity of 30% or less—between a scientist’s general H-index and their D-index is maintained to guarantee disciplinary focus and prevent undue bias from broader citation profiles.
Verification and Validation Procedures
Recognizing the limitations of raw bibliometric data, the research team employed rigorous manual verification processes for each scientist profile. This included cross-correlation of publication records with a wide variety of trustworthy and authoritative sources to ensure accuracy and authenticity.
While the number of papers published in prominent journals and conference proceedings does not contribute directly to a researcher’s position in the Research.com ranking, it serves as a valuable secondary indicator of a scientist’s substantive contribution to the Environmental Sciences.
The ranking positions themselves are established using the D-index derived from data sources such as OpenAlex and CrossRef, which are among the most prominent and reliable bibliometric databases available to the global research community. For a detailed explanation of the methodologies applied, please visit our methodology page.
Research.com’s Mission and Vision
Research.com is dedicated to advancing global scientific knowledge by identifying and promoting leading experts across disciplines and regions. Our mission is to motivate researchers, institutions, corporations, and policymakers worldwide to examine emerging trends and recognize the direction of pioneering research.
By providing transparent, data-driven rankings, we offer the scientific community a reliable resource to discover top contributors in specific fields such as Environmental Sciences, whether by country, institution, or specialization. Through this effort, we strive to foster collaboration, innovation, and informed decision-making at all levels of academia and industry.
