Data Sources and Bibliometric Collection
The 5th edition of the Research.com Best Earth Science Scientists in Kazakhstan Ranking has been compiled using comprehensive bibliometric data primarily sourced from OpenAlex and CrossRef, complemented by multiple additional databases to ensure a robust and diversified dataset. Bibliometric information used to compute the citation-based metrics underlying the ranking was collected on January 12, 2026. The ranking positions of scientists are determined by their Discipline H-index (D-index), a metric that exclusively includes papers and citation counts pertinent to the examined discipline of Earth Science, thereby reflecting researchers’ specific impact within this field.
Scope of Research and Eligibility Criteria
The ranking process involved an extensive analysis of 279,971 scientist profiles drawn from a wide spectrum of bibliometric data sources and encompassing all scientific disciplines. Specifically, 1,000 scientists identified within the domain of Earth Science were evaluated for inclusion. To qualify for the ranking, a researcher was required to have a D-index of at least 30, with a majority of their tier publications concentrated in Earth Science. Beyond bibliometric thresholds, scientists’ awards and notable achievements in Earth Science were also considered. The D-index qualification threshold is calibrated in increments of 10 according to the estimated total number of scholars within each discipline, ensuring that approximately the top 1% of leading researchers are captured in the ranking. Additionally, for inclusion, there needed to be a proximity of 30% or less between a researcher’s general H-index and their discipline-specific D-index, affirming a strong disciplinary focus in their publications and citations.
Verification and Validation Practices
The team behind this ranking is fully aware that bibliometric raw data alone cannot be an absolute measure of scientific output and quality. Consequently, all scientist profiles included in the ranking were manually verified by expert analysts. This involved cross-correlation against publications listed in a broad range of highly trustworthy sources to confirm accuracy and consistency. While the number of papers published in prominent journals and leading conference proceedings does not directly influence the determination of a researcher’s position in the Research.com rankings, it remains a valuable secondary indicator of a scientist’s contributions within Earth Science. The core determinant of ranking position is each researcher's D-index, calculated specifically using data from OpenAlex and CrossRef, the most widely recognized and authoritative bibliometric databases accessible to the global research community. For detailed insight into the methodology underpinning this ranking, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision
Research.com’s principal mission in creating these rankings is to inspire researchers, corporations, and policymakers worldwide to actively engage with the dynamic trajectories of leading scientific experts. By providing a transparent and methodically compiled platform, we facilitate the global scientific community’s ability to identify and recognize the foremost authorities in specialized fields such as Earth Science, as well as within specific countries and research institutions. Ultimately, our aim is to foster collaboration, enhance informed decision-making, and amplify the visibility of exemplary scholarship within the international science ecosystem.
