Data Sources and Bibliometric Information
The 5th edition of the Research.com Best Earth Science Scientists in Tunisia Ranking is founded upon meticulously curated bibliometric data primarily sourced from OpenAlex and CrossRef, supplemented by multiple other reputable data repositories. The citation-based metrics utilized to establish this ranking were compiled on January 12, 2026, ensuring the most up-to-date and comprehensive coverage of scholarly output.
A scientist’s position within the ranking is determined through the application of the D-index (Discipline H-index), a refined bibliometric indicator that exclusively accounts for a researcher’s publications and citation impact within the specific discipline under analysis—in this instance, Earth Science. This targeted approach offers a more nuanced and discipline-specific evaluation of research influence.
Scope of Research and Inclusion Criteria
The construction of this ranking involved the examination of 279,971 scientist profiles drawn from an extensive range of bibliometric data sources covering all scientific disciplines. Within this dataset, only 2 scientists specifically identified with Earth Science met the initial screening criteria. To qualify for inclusion, researchers were required to have a D-index of at least 30, ensuring that only those with significant disciplinary impact were considered. Furthermore, a majority of their tier publications had to be concentrated in Earth Science to affirm disciplinary relevance.
Recognition of awards and notable achievements in the Earth Science domain also informed the selection process as supplementary qualitative indicators of scholarly distinction. The D-index threshold applied to identify top researchers is methodically adjusted in increments of 10 based on the estimated total number of scholars in each discipline, all while ensuring that the premier 1% of leading scientists worldwide are captured within the ranking. Additionally, to maintain disciplinary focus, the proximity between a scientist’s overall H-index and their D-index is maintained at 30% or less, reflecting a consistent research emphasis within Earth Science.
Verification and Quality Assurance Practices
Research.com fully acknowledges the limitations inherent in relying solely on raw bibliometric data as an absolute measure of scientific output. Consequently, all scientist profiles included in the ranking underwent rigorous manual verification. This process involved cross-correlation against a broad spectrum of trusted publication sources to authenticate the accuracy and relevance of the data.
While the number of papers published in premier journals and conference proceedings does not directly influence a researcher’s ranking position, it is nonetheless considered a valuable secondary signal highlighting a scientist's contribution and recognition within the field. The final ranking positions are derived strictly from the D-index values calculated using data from OpenAlex and CrossRef, internationally recognized as the most prominent and reliable bibliometric databases accessible to the research community.
We invite readers to explore the details of our evaluative approach in-depth on our methodology page.
Research.com’s Mission and Vision
The genesis of this ranking is rooted in Research.com’s overarching mission to inspire and inform stakeholders across the global scientific ecosystem—including researchers, corporations, and policymakers. By illuminating the trajectories and prominence of leading experts, this ranking fosters greater transparency and connectivity within academic and research communities. It provides an authoritative gateway for discerning the foremost specialists in Earth Science, whether by country, specific area of expertise, or institutional affiliation.
Through this rigorous and transparent process, Research.com aims to contribute meaningfully to the advancement of science by recognizing excellence and guiding informed decision-making at multiple levels of the research enterprise.
