Data Sources and Ranking Methodology
The 5th edition of the Research.com Best Environmental Sciences Scientists in Sweden Ranking is founded on a robust and comprehensive collection of bibliometric data, primarily sourced from OpenAlex and CrossRef, alongside multiple other reputable bibliometric databases. These platforms represent the most prominent and well-known open bibliometric repositories available to the research community, providing extensive metadata on scholarly publications, citations, and authorship.
The bibliometric data employed to devise the citation-based metrics for this ranking were collected on January 12, 2026. A scientist’s position within the ranking is determined by their D-index (Discipline H-index), a specialized version of the traditional H-index that exclusively accounts for papers and citation metrics within the examined discipline. This discipline-specific approach ensures that the ranking accurately reflects expertise and impact within Environmental Sciences, rather than general research influence.
Scope of Research and Qualification Criteria
The ranking was compiled by examining a total of 279,971 scientist profiles identified across a diverse range of bibliometric data sources spanning multiple disciplines. Of these, 188 scientists were identified and assessed specifically within the Environmental Sciences discipline.
To qualify for inclusion in the ranking, candidates were required to meet a minimum D-index threshold of 30. Additionally, a majority of their tier publications had to be within the Environmental Sciences field, ensuring dedication and focus on the discipline. Beyond bibliometrics, scientists’ awards and achievements in Environmental Sciences were also considered as important evaluative factors.
The D-index threshold for top researchers is dynamically set as increments of 10, calibrated according to the estimated total number of scholars within each discipline. This methodology guarantees that the ranking captures at least the top 1% of leading scholars. Furthermore, for validity, a candidate’s general H-index and their discipline-specific D-index must be within a proximity of 30% or less, safeguarding consistency and discipline relevance in ranking positions.
Additional Verification Practices
Recognizing that raw bibliometric data alone cannot serve as an absolute measure of scholarly contribution, the Research.com team undertook extensive manual verification of all scientist profiles included in this ranking. This verification process involved cross-correlating publication records against a wide array of trustworthy and authoritative sources to ensure accuracy and legitimacy.
While the number of papers published in prominent journals and conference proceedings is not a direct factor influencing a researcher’s ranking position, it serves as a valuable secondary indicator of a scientist’s contribution and influence within the discipline. The primary ranking metric remains the D-index, rigorously calculated based on data from OpenAlex and CrossRef.
We encourage interested readers and institutions to consult our methodology page for a detailed exposition of the principles and processes underpinning the ranking.
Research.com’s Vision and Mission
At Research.com, our mission is to inspire and empower researchers, industry leaders, and policymakers globally to identify and follow the trajectories of leading experts in various scientific domains. By providing transparent, meticulously crafted rankings, we enable the wider scientific community to recognize who the foremost specialists are within specific disciplines, countries, and research institutions.
We are committed to delivering rankings that combine rigorous data analysis with thoughtful validation to foster informed decision-making and collaborative opportunities across academia, industry, and government sectors.
