A researcher’s position in this ranking is determined by their D-index (Discipline H-index), a metric that exclusively considers publications and citation data within the specific discipline of Environmental Sciences. This approach enables a focused and fair comparison tailored to the relevant scholarly domain, rather than relying on generalized indicators.
Scope of Research and Qualification Criteria
A total of 279,971 scientist profiles were examined across all scientific disciplines from the aggregated bibliometric sources, of which 15 scientists specializing in Environmental Sciences in Singapore were identified for detailed evaluation. To qualify for inclusion in this ranking, a scientist’s D-index needed to reach a minimum threshold of 30, with the majority of their tier publications situated firmly within the field of Environmental Sciences. Additionally, consideration was given to awards and achievements specifically relating to Environmental Sciences, further emphasizing the relevance and impact of a candidate’s contributions.
The threshold for the D-index is dynamically adjusted in increments of 10 relative to the estimated number of scholars in each discipline, ensuring coverage of the top 1% of leading researchers within their respective fields. To maintain consistency and discipline relevance, a maximum proximity of 30% or less between a researcher’s overall H-index and their D-index was required, safeguarding the focus on domain-specific scientific excellence.
Verification and Validation Practices
Recognizing that raw bibliometric data alone cannot serve as an absolute measure of a researcher’s output and impact, the ranking team undertook meticulous manual verification of all scientist profiles. This involved cross-referencing publication records against a broad range of authoritative and trustworthy sources to assure data integrity and profile accuracy.
While the number of publications in prominent journals and conference proceedings does not directly influence a researcher’s ranking position, it constitutes an important secondary signal of scholarly contribution within Environmental Sciences. The ranking position itself is firmly based on the D-index metric derived from the carefully curated data provided by OpenAlex and CrossRef, which are regarded as the most prominent and reliable bibliometric databases available to the global research community.
For detailed information about the comprehensive methodology behind this ranking, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision
Research.com is committed to motivating researchers, companies, and policymakers worldwide by illuminating the trajectories of leading experts across diverse scientific disciplines. Our mission is to provide the global scientific community with transparent, credible, and accessible rankings that identify top researchers not only by their individual achievements but also by their influence within specific areas of study, within countries, and even within individual research institutions.
By fostering awareness of leading experts, we aim to support informed decision-making and collaborative progress across academia, industry, and government, ultimately advancing scientific innovation and discovery on a global scale.
