A scientist’s position in the ranking is determined by their D-index (Discipline H-index), which specifically measures citation impact within the examined discipline of Environmental Sciences. This metric ensures that only publications and citations relevant to the scientist’s work within the field contribute to their ranking position, allowing for a focused and meaningful evaluation of scholarly influence.
Scope of Research and Eligibility Criteria
This ranking derives from a thorough examination of 279,971 scientist profiles identified across a broad spectrum of bibliometric data sources, covering all scientific disciplines. Within this expansive dataset, 63 scientists specializing in Environmental Sciences have been evaluated for potential inclusion.
To qualify for the ranking, a scientist must have a D-index of at least 30, indicating significant academic contributions within Environmental Sciences. Additionally, a majority of their tier publications must be directly related to the Environmental Sciences domain. Awards and notable achievements in this field were also factored into the consideration process to more comprehensively evaluate a researcher’s impact.
The threshold for the D-index is calibrated in increments of 10 based on the total estimated number of scholars in each discipline, ensuring inclusion of the top 1% of leading experts. Furthermore, the methodology requires that the proximity between a scientist’s general H-index and their D-index remains within 30% or less, which helps to confirm that their scholarly influence is concentrated and relevant to Environmental Sciences.
Verification Practices and Quality Assurance
The researchers responsible for creating this ranking acknowledge the limitations of relying solely on raw bibliometric data as an absolute measure of scholarly output. Consequently, each scientist’s profile underwent manual verification and cross-correlation against publications indexed in multiple trustworthy sources. This step was crucial to enhance accuracy and ensure that the ranking reflects genuine academic achievements.
While the ranking itself does not factor directly into a researcher’s position, the number of papers published in prominent journals and conference proceedings serves as a valuable secondary indicator of a scientist’s contribution to their discipline. The ultimate ranking positions are derived from the D-index, calculated using data from OpenAlex and CrossRef—recognized as leading bibliometric databases within the global research community.
For additional details about the methodology underpinning this ranking, please refer to our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission is to inspire researchers, corporations, and policymakers worldwide to explore emerging trends and the trajectories of leading experts. By identifying and recognizing the foremost scientists in specific fields, countries, and institutions, we aim to facilitate informed decision-making and foster collaboration across the global scientific community.
This ranking exemplifies our commitment to meticulous research and transparency, providing a reliable resource for academic institutions and research professionals to discover and connect with top-tier Environmental Sciences experts in Portugal.
