Thomas C. Johnson

10.6k citations

180 papers · 8.0k · 2 hit papers · h-index 51

Impact in

Earth-Surface Processes top 0.2%
- Geological formations and processes
Atmospheric Science top 0.5%
- Geology and Paleoclimatology Research

Papers in

Atmospheric Science 81
- Geology and Paleoclimatology Research 80
Ecology 78
- Aquatic Ecosystems and Biodiversity 53
- Isotope Analysis in Ecology 15

Co-authors: Erik T. Brown (16 shared papers)Josef P. Werne (18 shared papers)Christopher A. Scholz (21 shared papers)Michael R. Talbot (8 shared papers)James M. Russell (9 shared papers)Kerry Kelts (9 shared papers)R. D. Ricketts (4 shared papers)Isla S. Castañeda (6 shared papers)
Journals: Palaeogeography Palaeoclimatology Palaeoecology (14 papers)Geology (11 papers)Journal of Great Lakes Research (10 papers)Geophysical Research Letters (5 papers)Proceedings of the National Academy of Sciences (5 papers)
Partner nations: United States Netherlands United Kingdom

In The Last Decade

Thomas C. Johnson

176 papers receiving 7.5k citations

Thomas C. Johnson's Hit Papers

align trajectories log scale

East African megadroughts between 135 and 75 thousand years ago and bearing on early-modern human origins 2007 · 385 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2007 Proceedings of the National Academy of Sciences
1996 Science

Peers

Countries citing papers authored by Thomas C. Johnson

Since Specialization

Citations

This map shows the geographic impact of Thomas C. Johnson'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 Thomas C. Johnson with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Thomas C. Johnson more than expected).

Fields of papers citing papers by Thomas C. Johnson

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Thomas C. Johnson. 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 Thomas C. Johnson. The network helps show where Thomas C. Johnson may publish in the future.

Co-authors

The 25 scholars most cited alongside Thomas C. Johnson, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Thomas C. Johnson Line = papers co-authored together Thomas C. Johnson links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 180 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Late Pleistocene Desiccation of Lake Victoria and Rapid Evolution of Cichlid Fishes Science ·Thomas C. Johnson, Christopher A. Scholz, Michael R. Talbot, Kerry Kelts, R. D. Ricketts, Gideon Ngobi, Kristina R. M. Beuning, Immacculate Ssemmanda, J. W. McGill Hit paper breakdown →	1996	479
2	East African megadroughts between 135 and 75 thousand years ago and bearing on early-modern human origins Proceedings of the National Academy of Sciences ·Christopher A. Scholz, Thomas C. Johnson, Andrew S. Cohen, John W. King, John A. Peck, Jonathan T. Overpeck, Michael R. Talbot, Erik T. Brown, L. Kalindekafe, P. Y. Amoako, R. P. Lyons, Timothy M. Shanahan, Isla S. Castañeda, C. W. Heil, Steven L. Forman, L. R. McHargue, Kristina R. M. Beuning, Jeanette Gomez, James Pierson Hit paper breakdown →	2007	385
3	History and timing of human impact on Lake Victoria, East Africa Proceedings of the Royal Society B Biological Sciences ·Dirk Verschuren, Thomas C. Johnson, Hedy Kling, D.N. Edgington, Peter R. Leavitt, Erik T. Brown, Michael R. Talbot, Robert E. Hecky	2002	314
4	Ecological consequences of early Late Pleistocene megadroughts in tropical Africa Proceedings of the National Academy of Sciences ·Andrew S. Cohen, Jeffery R. Stone, Kristina R. M. Beuning, Lisa Park Boush, Peter N. Reinthal, David L. Dettman, Christopher A. Scholz, Thomas C. Johnson, John W. King, Michael R. Talbot, Erik T. Brown, Sarah Ivory	2007	240
5	The Holocene paleolimnology of Lake Issyk-Kul, Kyrgyzstan: trace element and stable isotope composition of ostracodes Palaeogeography Palaeoclimatology Palaeoecology ·R. D. Ricketts, Thomas C. Johnson, Erik T. Brown, Kenneth A. Rasmussen, V. V. Romanovsky	2001	214
6	A High-Resolution Paleoclimate Record Spanning the Past 25,000 Years in Southern East Africa Science ·Thomas C. Johnson, Erik T. Brown, James McManus, Sylvia Barry, Philip Barker, Françoise Gasse	2002	211
7	Major low levels of Lake Malawi and their implications for speciation rates in cichlid fishes Proceedings of the Royal Society of London. Series B, Biological sciences ·R. Bernhart Owen, R. Crossley, Thomas C. Johnson, Denis Tweddle, I. Kornfield, S. Davison, David H. Eccles, D. E. Engstrom	1990	209
8	Crenarchaeotal membrane lipids in lake sediments: A new paleotemperature proxy for continental paleoclimate reconstruction? Geology ·Lindsay A. Powers, Josef P. Werne, Thomas C. Johnson, Ellen C. Hopmans, Jaap S. Sinninghe Damsté, Stefan Schouten	2004	200
9	Carbon cycling in large lakes of the world: A synthesis of production, burial, and lake‐atmosphere exchange estimates Global Biogeochemical Cycles ·Simone R. Alin, Thomas C. Johnson	2007	171
10	Large temperature variability in the southern African tropics since the Last Glacial Maximum Geophysical Research Letters ·Lindsay A. Powers, Thomas C. Johnson, Josef P. Werne, Isla S. Castañeda, Ellen C. Hopmans, Jaap S. Sinninghe Damsté, Stefan Schouten	2005	167
11	Ash from the Toba supereruption in Lake Malawi shows no volcanic winter in East Africa at 75 ka Proceedings of the National Academy of Sciences ·Christine Lane, Ben T. Chorn, Thomas C. Johnson	2013	151
12	The Holocene History of Lake Victoria AMBIO ·Thomas C. Johnson, Kerry Kelts, Eric Odada	2000	151
13	Simulating the transient evolution and abrupt change of Northern Africa atmosphere–ocean–terrestrial ecosystem in the Holocene Quaternary Science Reviews ·Z. Liu, Yi Wang, Robert G. Gallimore, Françoise Gasse, Thomas C. Johnson, Peter B deMenocal, Jess F. Adkins, Michael Notaro, I. Colin Prentice, John E. Kutzbach, Robert Jacob, P. Behling, L. Wang, Everest Ong	2007	146
14	Abrupt change in tropical African climate linked to the bipolar seesaw over the past 55,000 years Geophysical Research Letters ·Erik T. Brown, Thomas C. Johnson, Christopher A. Scholz, Andrew S. Cohen, John W. King	2007	145
15	Molecular records of climate variability and vegetation response since the Late Pleistocene in the Lake Victoria basin, East Africa Quaternary Science Reviews ·Melissa A. Berke, Thomas C. Johnson, Josef P. Werne, Kliti Grice, Stefan Schouten, Jaap S. Sinninghe Damsté	2012	132
16	Anthropogenic climate change has altered primary productivity in Lake Superior Nature Communications ·Molly D. O’Beirne, Josef P. Werne, Robert E. Hecky, Thomas C. Johnson, Sergei Katsev, Euan D. Reavie	2017	131
17	A high-resolution geochemical record from Lake Edward, Uganda Congo and the timing and causes of tropical African drought during the late Holocene Quaternary Science Reviews ·James M. Russell, Thomas C. Johnson	2005	113
18	The late Pleistocene desiccation of Lake Victoria and the origin of its endemic biota Hydrobiologia ·J. Curt Stager, Thomas C. Johnson	2007	109
19	Late Quaternary vegetation history of southeast Africa: The molecular isotopic record from Lake Malawi Palaeogeography Palaeoclimatology Palaeoecology ·Isla S. Castañeda, Josef P. Werne, Thomas C. Johnson, T. R. Filley	2009	109
20	Wet and arid phases in the southeast African tropics since the Last Glacial Maximum Geology ·Isla S. Castañeda, Josef P. Werne, Thomas C. Johnson	2007	106

About Thomas C. Johnson

Thomas C. Johnson is a scholar working on Atmospheric Science, Ecology, Earth-Surface Processes, Environmental Chemistry and Anthropology, having authored 180 papers that have together received 8.0k indexed citations. Recurring topics across this work include Geology and Paleoclimatology Research (80 papers), Aquatic Ecosystems and Biodiversity (53 papers), Geological formations and processes (42 papers), Pleistocene-Era Hominins and Archaeology (25 papers), Aquatic Ecosystems and Phytoplankton Dynamics (23 papers), Isotope Analysis in Ecology (15 papers), Fish Ecology and Management Studies (11 papers) and Geological and Geophysical Studies (9 papers). The work is most often cited by research in Earth-Surface Processes (1.8k citations), Atmospheric Science (4.4k citations), Archeology (213 citations), Environmental Chemistry (1.4k citations) and Paleontology (1.1k citations). Thomas C. Johnson has collaborated with scholars based in United States, Netherlands and United Kingdom. Frequent co-authors include Erik T. Brown, Josef P. Werne, Christopher A. Scholz, Michael R. Talbot, James M. Russell, Kerry Kelts, R. D. Ricketts, Isla S. Castañeda, Jaap S. Sinninghe Damsté and John D. Halfman. Their work appears in journals such as Palaeogeography Palaeoclimatology Palaeoecology, Geology, Journal of Great Lakes Research, Geophysical Research Letters and Proceedings of the National Academy of Sciences.

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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Thomas C. Johnson's Hit Papers

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