Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation Index, Universities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025
* Total Citation Counts Rankings
Ranking Based On Selection :1
Dryland Ecology
Geospatial analysis
Global environmental change
Vegetation and land cover change.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
421
310
0.736
* Total Citation Counts Rankings
Ranking Based On Selection :2
Geography
Environmental Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16
15
0.938
* Total Citation Counts Rankings
Ranking Based On Selection :3
Hydrology and water resources
Fluvial geomorphology
Hydrogeology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11
11
1.000
Yahaya Zayyana Ibrahim
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
421
310
0.736
Dryland Ecology
Geospatial analysis
Global environmental change
Vegetation and land cover change.
Abdulmalik Maiwada Sada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16
15
0.938
Mudassir Hassan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11
11
1.000
Hydrology and water resources
Fluvial geomorphology
Hydrogeology