Timothy Knowles

2.1k citations

39 papers · 739 indexed · h-index 17

Impact in

Paleontology top 5%
- Archaeology and ancient environmental studies
Pollution top 10%
- Microbial bioremediation and biosurfactants

Papers in ⓘ

Ecology 18
- Isotope Analysis in Ecology 16
Paleontology 14
- Archaeology and ancient environmental studies 13

Co-authors: Richard P. Evershed (18 shared papers)Örjan Gustafsson (4 shared papers)Richard D. Pancost (4 shared papers)Emmanuelle Casanova (10 shared papers)Christopher J. Chuck (1 shared paper)Sofia Raikova (1 shared paper)Michael J. Allen (1 shared paper)Christoph Aeppli (3 shared papers)
Journals: Environmental Science & Technology (4 papers)Radiocarbon (4 papers)Analytical Chemistry (3 papers)PLoS ONE (2 papers)Rapid Communications in Mass Spectrometry (2 papers)
Partner nations: United Kingdom United States China

In The Last Decade

Timothy Knowles

35 papers receiving 734 citations

Peers

Countries citing papers authored by Timothy Knowles

Since Specialization

Citations

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

Fields of papers citing papers by Timothy Knowles

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Timothy Knowles. 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 Timothy Knowles. The network helps show where Timothy Knowles may publish in the future.

Co-authors

The 25 scholars most cited alongside Timothy Knowles, 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 Timothy Knowles Line = papers co-authored together Timothy Knowles 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 39 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Source Apportionment of Polycyclic Aromatic Hydrocarbons in Central European Soils with Compound-Specific Triple Isotopes (δ ¹³ C, Δ ¹⁴ C, and δ ² H) Environmental Science & Technology ·Carme Bosch, August Andersson, Martin Kruså, Cecilia Bandh, Ivana Hovorková, Jana Klánová, Timothy Knowles, Richard D. Pancost, Richard P. Evershed, Örjan Gustafsson	2015	77
2	Carbon and Chlorine Isotope Fractionation During Microbial Degradation of Tetra- and Trichloroethene Environmental Science & Technology ·Charline Wiegert, Manolis Mandalakis, Timothy Knowles, Paraskevi Polymenakou, Christoph Aeppli, Jiřina Macháčková, Henry Holmstrand, Richard P. Evershed, Richard D. Pancost, Örjan Gustafsson	2013	56
3	Dual Carbon–Chlorine Stable Isotope Investigation of Sources and Fate of Chlorinated Ethenes in Contaminated Groundwater Environmental Science & Technology ·Charline Wiegert, Christoph Aeppli, Timothy Knowles, Henry Holmstrand, Richard P. Evershed, Richard D. Pancost, Jiřina Macháčková, Örjan Gustafsson	2012	55
4	Co-liquefaction of Macroalgae with Common Marine Plastic Pollutants ACS Sustainable Chemistry & Engineering ·Sofia Raikova, Timothy Knowles, Michael J. Allen, Christopher J. Chuck	2019	53
5	Practical considerations in the determination of compound‐specific amino acid δ ¹⁵ N values in animal and plant tissues by gas chromatography‐combustion‐isotope ratio mass spectrometry, following derivatisation to their N ‐acetylisopropyl esters Rapid Communications in Mass Spectrometry ·Amy Styring, Alison Kuhl, Timothy Knowles, Rebecca Fraser, Amy Bogaard, Richard P. Evershed	2012	45
6	Tracing the rate and extent of N and C flow from 13C,15N-glycine and glutamate into individual de novo synthesised soil amino acids Organic Geochemistry ·Timothy Knowles, David R. Chadwick, Roland Bol, Richard P. Evershed	2010	44
7	Kinship and social organization in Copper Age Europe. A cross-disciplinary analysis of archaeology, DNA, isotopes, and anthropology from two Bell Beaker cemeteries PLoS ONE ·Karl-Göran Sjögren, Íñigo Olalde, Sophie Carver, Morten E. Allentoft, Timothy Knowles, Guus Kroonen, Alistair Pike, Peter Schröter, Keri A. Brown, Kate Robson Brown, R. J. Harrison, François Bertemes, David Reich, Kristian Kristiansen, Volker Heyd	2020	39
8	Cretaceous dinosaur bone contains recent organic material and provides an environment conducive to microbial communities eLife ·Evan T. Saitta, Renxing Liang, Maggie C. Y. Lau, Caleb M. Brown, Nicholas R. Longrich, Thomas G. Kaye, Ben J. Novak, Steven L. Salzberg, Mark A. Norell, Geoffrey D. Abbott, Marc R. Dickinson, Jakob Vinther, Ian D. Bull, Richard A. Brooker, Peter Martin, Paul Donohoe, Timothy Knowles, Kirsty Penkman, T. C. Onstott	2019	35
9	Practical Considerations in High-Precision Compound-Specific Radiocarbon Analyses: Eliminating the Effects of Solvent and Sample Cross-Contamination on Accuracy and Precision Analytical Chemistry ·Emmanuelle Casanova, Timothy Knowles, Christopher Williams, Matthew P. Crump, Richard P. Evershed	2018	29
10	Rapid shifts in circulation and biogeochemistry of the Southern Ocean during deglacial carbon cycle events Science Advances ·Tao Li, Laura F. Robinson, Tianyu Chen, Xingchen Wang, Andrea Burke, James Rae, Albertine Pegrum-Haram, Timothy Knowles, Gaojun Li, Jun Chen, Hong Chin Ng, Maria G. Prokopenko, G Rowland, Ana Samperiz, Joseph Stewart, John Southon, Peter T. Spooner	2020	27
11	Living off the land: Terrestrial-based diet and dairying in the farming communities of the Neolithic Balkans PLoS ONE ·Darko Stojanovski, Ivana Živaljević, Vesna Dimitrijević, Julie Dunne, Richard P. Evershed, Marie Balasse, Adam Dowle, Jessica Hendy, Krista McGrath, Román Fischer, Camilla Speller, Jelena Jovanović, Emmanuelle Casanova, Timothy Knowles, Lidija Balj, Goce Naumov, Anđelka Putica, Andrej Starović, Sofija Stefanović	2020	26
12	Field emission characteristics of a small number of carbon fiber emitters AIP Advances ·Wilkin Tang, D. Shiffler, J. R. Harris, Kevin L. Jensen, K. Golby, Matthew LaCour, Timothy Knowles	2016	26
13	Experimental study of electric field screening by the proximity of two carbon fiber cathodes Journal of Vacuum Science & Technology B Nanotechnology and Microelectronics Materials Processing Measurement and Phenomena ·Wilkin Tang, Don Shiffler, K. Golby, Matthew LaCour, Timothy Knowles	2012	25
14	Persistently well-ventilated intermediate-depth ocean through the last deglaciation Nature Geoscience ·Tianyu Chen, Laura F. Robinson, Andrea Burke, Louis M. Claxton, Mathis P. Hain, Tao Li, James Rae, Joseph Stewart, Timothy Knowles, Daniel J. Fornari, K. S. Harpp	2020	21
15	Compound‐specific amino acid ¹⁵ N stable isotope probing of nitrogen assimilation by the soil microbial biomass using gas chromatography/combustion/isotope ratio mass spectrometry Rapid Communications in Mass Spectrometry ·Alice F. Charteris, Timothy Knowles, Katerina Michaelides, Richard P. Evershed	2016	20
16	The age of ambergris Natural Product Research ·Steven J. Rowland, Paul Sutton, Timothy Knowles	2018	19
17	Use of a 700 MHz NMR Microcryoprobe for the Identification and Quantification of Exogenous Carbon in Compounds Purified by Preparative Capillary Gas Chromatography for Radiocarbon Determinations Analytical Chemistry ·Emmanuelle Casanova, Timothy Knowles, Christopher Williams, Matthew P. Crump, Richard P. Evershed	2017	18
18	Field enhancement for fiber emitters in linear and rectangular arrays Journal of Vacuum Science & Technology B Nanotechnology and Microelectronics Materials Processing Measurement and Phenomena ·Wilkin Tang, Don Shiffler, K. Golby, Matthew LaCour, Timothy Knowles	2014	16
19	14C wiggle-matching of short tree-ring sequences from post-medieval buildings in England Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ·Peter Marshall, Alex Bayliss, Shahina Farid, Cathy Tyers, Christopher Bronk Ramsey, Gordon Cook, Turhan Doğan, Stewart P.H.T. Freeman, Erhan İlkmen, Timothy Knowles	2018	16
20	Radiocarbon Sample Preparation Procedures and the First Status Report from the Bristol Radiocarbon AMS (BRAMS) Facility Radiocarbon ·Timothy Knowles, Paul S Monaghan, Richard P. Evershed	2019	14

About Timothy Knowles

Timothy Knowles is a scholar working on Ecology, Paleontology, Atmospheric Science, Geography, Planning and Development and Archeology, having authored 39 papers that have together received 739 indexed citations. Recurring topics across this work include Isotope Analysis in Ecology (16 papers), Archaeology and ancient environmental studies (13 papers), Pacific and Southeast Asian Studies (6 papers), Geology and Paleoclimatology Research (6 papers), Toxic Organic Pollutants Impact (3 papers), Forensic Anthropology and Bioarchaeology Studies (3 papers), Carbon Nanotubes in Composites (3 papers) and Methane Hydrates and Related Phenomena (3 papers). The work is most often cited by research in Paleontology (175 citations), Pollution (104 citations), Geography, Planning and Development (49 citations), Ecology (214 citations) and Health, Toxicology and Mutagenesis (113 citations). Timothy Knowles has collaborated with scholars based in United Kingdom, United States and China. Frequent co-authors include Richard P. Evershed, Örjan Gustafsson, Richard D. Pancost, Emmanuelle Casanova, Christopher J. Chuck, Sofia Raikova, Michael J. Allen, Christoph Aeppli, Henry Holmstrand and Jiřina Macháčková. Their work appears in journals such as Environmental Science & Technology, Radiocarbon, Analytical Chemistry, PLoS ONE and Rapid Communications in Mass Spectrometry.

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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