Marc Humphries

2.0k total citations · 1 hit paper
77 papers, 1.4k citations indexed

About

Marc Humphries is a scholar working on Ecology, Atmospheric Science and Earth-Surface Processes. According to data from OpenAlex, Marc Humphries has authored 77 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Ecology, 22 papers in Atmospheric Science and 21 papers in Earth-Surface Processes. Recurrent topics in Marc Humphries's work include Geology and Paleoclimatology Research (20 papers), Geological formations and processes (18 papers) and Coastal wetland ecosystem dynamics (12 papers). Marc Humphries is often cited by papers focused on Geology and Paleoclimatology Research (20 papers), Geological formations and processes (18 papers) and Coastal wetland ecosystem dynamics (12 papers). Marc Humphries collaborates with scholars based in South Africa, United Kingdom and United States. Marc Humphries's co-authors include Archibold Buah-Kwofie, Letitia Pillay, T.S. McCarthy, Jemma Finch, Andrew Green, W.N. Ellery, Andrew Kindness, J. C. Hughes, Claudia R. Benitez‐Nelson and Andrew Cooper and has published in prestigious journals such as The Science of The Total Environment, Environmental Pollution and Chemosphere.

In The Last Decade

Marc Humphries

70 papers receiving 1.4k citations

Hit Papers

Rare Earth Elements: The Global Supply Chain 2013 2026 2017 2021 2013 50 100 150 200 250
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Rare Earth Elements: The Global Supply Chain
    2013 299 citations Marc Humphries University of North Texas Digital Library (University of North Texas) profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Marc Humphries South Africa 22 326 311 259 253 213 77 1.4k
Zheng 19 250 0.8× 215 0.7× 215 0.8× 283 1.1× 96 0.5× 181 1.4k
Debra Phillips United Kingdom 24 227 0.7× 279 0.9× 221 0.9× 57 0.2× 89 0.4× 72 1.9k
Shuang Zhao China 25 343 1.1× 700 2.3× 139 0.5× 704 2.8× 185 0.9× 87 1.9k
Hongbing Ji China 21 161 0.5× 269 0.9× 708 2.7× 233 0.9× 91 0.4× 91 1.7k
Shen China 20 185 0.6× 192 0.6× 133 0.5× 289 1.1× 62 0.3× 313 1.7k
Т. И. Моисеенко Russia 20 254 0.8× 497 1.6× 476 1.8× 138 0.5× 96 0.5× 120 1.4k
Jihua Liu China 25 862 2.6× 505 1.6× 603 2.3× 345 1.4× 169 0.8× 141 2.4k
Stephen M. Mudge United Kingdom 26 350 1.1× 523 1.7× 483 1.9× 145 0.6× 83 0.4× 104 2.1k
Imasiku Nyambe Zambia 25 152 0.5× 274 0.9× 593 2.3× 99 0.4× 61 0.3× 103 1.9k
Yugang Wang China 22 495 1.5× 158 0.5× 405 1.6× 196 0.8× 61 0.3× 66 2.3k

Countries citing papers authored by Marc Humphries

Since Specialization
Citations

This map shows the geographic impact of Marc Humphries's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Marc Humphries with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Marc Humphries more than expected).

Fields of papers citing papers by Marc Humphries

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Marc Humphries. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Marc Humphries. The network helps show where Marc Humphries may publish in the future.

Co-authorship network of co-authors of Marc Humphries

This figure shows the co-authorship network connecting the top 25 collaborators of Marc Humphries. A scholar is included among the top collaborators of Marc Humphries based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Marc Humphries. Marc Humphries is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Humphries, Marc, et al.. (2025). Exposure of Sub-adult Nile Crocodiles (Crocodylus niloticus) to Extreme Lead Concentrations: A 48-week Experimental Study with Implications for Wild Populations. Archives of Environmental Contamination and Toxicology. 89(3). 372–385.
2.
Humphries, Marc, et al.. (2024). A 6000-year high-resolution composite record of El Niño-related drought in subtropical southeast Africa. Quaternary Science Reviews. 344. 108992–108992. 3 indexed citations
3.
Ralph, Timothy J., et al.. (2023). Contemporary channel adjustment and geomorphic sensitivity of the lower Mara River and its floodplain wetlands, Tanzania. Geomorphology. 425. 108583–108583. 3 indexed citations
4.
Curtis, C. J., et al.. (2023). Anthropocene environmental change in an overlooked South African lake: Mountain Lake, Matatiele, Eastern Cape. Transactions of the Royal Society of South Africa. 78(1-2). 45–66. 3 indexed citations
5.
Fietz, Susanne, Andrea Baker, Charlotte Miller, et al.. (2022). Terrestrial temperature evolution of southern Africa during the late Pleistocene and Holocene: Evidence from the Mfabeni Peatland. Quaternary Science Reviews. 299. 107870–107870. 5 indexed citations
6.
Humphries, Marc, et al.. (2022). Origin, transport, and retention of fluvial sedimentary organic matter in South Africa's largest freshwater wetland, Mkhuze Wetland System. Biogeosciences. 19(11). 2881–2902. 2 indexed citations
7.
Humphries, Marc, et al.. (2022). Organochlorine pesticide contamination in sediments from Richards Bay, South Africa: spatial trends and ecotoxicological risks. Environmental Science and Pollution Research. 30(1). 2247–2259. 14 indexed citations
8.
Humphries, Marc, et al.. (2021). Accumulation of commonly used agricultural herbicides in coral reef organisms from iSimangaliso Wetland Park, South Africa. Environmental Pollution. 294. 118665–118665. 7 indexed citations
9.
Humphries, Marc, et al.. (2020). Dust provenance and its role as a potential fertilizing agent for the Okavango Delta, Botswana. Earth Surface Processes and Landforms. 45(8). 1705–1716. 8 indexed citations
10.
Miller, Charlotte, Jemma Finch, Trevor Hill, et al.. (2019). The drivers of late Quaternary climate variability in eastern South Africa. 3 indexed citations
11.
Miller, Charlotte, Jemma Finch, Trevor Hill, et al.. (2019). Late Quaternary climate variability at Mfabeni peatland, eastern South Africa. Climate of the past. 15(3). 1153–1170. 24 indexed citations
12.
Neumann, Frank, Hayley C. Cawthra, Andrew S. Carr, et al.. (2017). Palaeoenvironments during a terminal Oligocene or early Miocene transgression in a fluvial system at the southwestern tip of Africa. Global and Planetary Change. 150. 1–23. 21 indexed citations
13.
Humphries, Marc. (2015). China's Mineral Industry and U.S. Access to Strategic and Critical Minerals: Issues for Congress [March 20, 2015]. Library of Congress. Congressional Research Service. 1 indexed citations
14.
McCarthy, T.S. & Marc Humphries. (2013). Contamination of the water supply to the town of Carolina, Mpumalanga, January 2012 : research article. South African Journal of Science. 109. 1–10. 2 indexed citations
15.
Humphries, Marc, et al.. (2013). U.S. Offshore Oil and Gas Resources: Prospects and Processes. University of North Texas Digital Library (University of North Texas).
16.
Humphries, Marc. (2013). Mining on Federal Lands. University of North Texas Digital Library (University of North Texas).
17.
Humphries, Marc. (2012). Rare Earth Elements: The Global Supply Chain [June 8, 2012]. Library of Congress. Congressional Research Service. 4 indexed citations
18.
Humphries, Marc. (2010). Rare Earth Elements: The Global Supply Chain [September 30, 2010]. Library of Congress. Congressional Research Service. 6 indexed citations
19.
Humphries, Marc, Anthony Andrews, & Peter Folger. (2009). Unconventional Gas Shales: Development, Technology, and Policy Issues [October 30, 2009]. Library of Congress. Congressional Research Service. 3 indexed citations
20.
Humphries, Marc. (2009). Royalty Relief for U.S. Deepwater Oil and Gas Leases. University of North Texas Digital Library (University of North Texas). 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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