2023 April 1 -- I will be starting my position as Assistant Professor in the Department of Earth Sciences at Durham University, UK. More updates soon! In the meantime, feel free  to reach out if you're interested in doing a PhD or a postdoc on the topics I work on.


I was born in Vilnius, Lithuania. I obtained my BS in Chemistry at Jacobs University (Bremen, Germany) in 2011. I obtained my MS and PhD in Earth Sciences at the University of Southern California (Los Angeles, USA) in 2014 and 2017, respectively. I then worked as a Postdoctoral Research Associate at the University of Cambridge in the UK, followed by a Marie Sklodowska-Curie Fellowship at the Institut de Physique du Globe de Paris in France. I am currently Assistant Professor at Durham University in the UK. My research encompasses isotope geochemistry, Critical Zone science, and all aspects of biogeochemical cycling of elements in the Earth surface environment.

Contact Details

Dr. J. Jotautas Baronas
Dept. of Earth Sciences
Durham University
Stockton Road
Durham DH1 3LE
United Kingdom


L Bridgestock, G M Henderson, P Holdship, Aung Myo Khaing, Tin Tin Naing, Tin Aung Myint, Wint Wint Htun, Win Khant, Win Myo Thu, Mo Aung Nay Chi, J J Baronas, E T Tipper, H Chapman, M J Bickle (2022). Dissolved trace element concentrations and fluxes in the Irrawaddy, Salween, Sittaung and Kaladan Rivers, Science of the Total Environment, 841, 156756.

M S Schwab, R G Hilton, N Haghipour, J J Baronas, TI Eglinton (2022). Vegetal Undercurrents—Obscured Riverine Dynamics of Plant Debris, Journal of Geophysical Research: Biogeosciences, 127(3), e2021JG006726.
[OA link]

K E Relph, E I Stevenson, A V  Turchyn, G Antler, M J Bickle, J J Baronas, D R Parsons, S E Darby, E T Tipper (2021). Partitioning riverine sulfate sources using oxygen and sulfur isotopes: Implications for carbon budgets of large rivers, Earth and Planetary Science Letters, 567, 116957.

C S Larkin, A M Piotrowski, R S Hindshaw, G Bayon, R G Hilton, J J Baronas, M Dellinger, R Wang, E T Tipper (2021). Constraints on the source of reactive phases in sediment from a major Arctic river using neodymium isotopes, Earth and Planetary Science Letters, 565, 116933.

J J Baronas, D E Hammond, M Bennett, O J Rouxel, L C Smith (2021). Ge/Si and Ge isotope fractionation during glacial and non-glacial weathering: field and experimental data from West Greenland, Frontiers in Earth Science, 9, 36.

E T Tipper, E I Stevenson, V Alcock, A C G Knight, J J Baronas, R G Hilton, M J Bickle, C S Larkin, L Feng, K E Relph, G Hughes. (2021). Global silicate weathering flux overestimated because of sediment–water cation exchange, Proceedings of the National Academy of Sciences, 118 (1), e2016430118. [OA link]

M A Torres, J J Baronas (2021). Modulation of riverine concentration-discharge relationships by changes in the shape of the water transit time distribution, Global Biogeochemical Cycles, 35, e2020GB006694. [OA link]

L Urban, A Holzer, J J Baronas, M B Hall, P Braeuninger-Weimer, M J Scherm, D J Kunz, S N Perera, D E Martin-Herranz, E T Tipper, S J Salter, M R Stammnitz (2021). Freshwater monitoring by nanopore sequencing, eLife, e61504.

J J Baronas, E I Stevenson, C R Hackney, S E Darby, M J Bickle, R G Hilton, C S Larkin, D R Parsons, Aung Myo Khaing, E T Tipper. (2020). Integrating suspended sediment flux in large alluvial river channels: Application of a synoptic Rouse-based model to the Irrawaddy and Salween rivers, Journal of Geophysical Research: Earth Surface, 125, e2020JF005554.

J J Baronas, A J West, K W Burton, D E Hammond, S Opfergelt, P Pogge von Strandmann, R H James, O J Rouxel (2020). Ge and Si isotope behavior during intense tropical weathering and ecosystem cycling, Global Biogeochemical Cycles, 34, e2019GB006522.

J J Baronas, D E Hammond, O J Rouxel, D R Monteverde (2019). A first look at dissolved Ge isotopes in marine sediments, Frontiers in Earth Science, 7, 162.

J J Baronas, M A Torres, A J West, O Rouxel, B Georg, J Bouchez, J Gaillardet, D E Hammond (2018). Ge and Si isotope signatures in rivers: A quantitative multi-proxy approach, Earth and Planetary Science Letters , 503, 194-215.

D R Monteverde, J B Sylvan, C Suffridge, J J Baronas, E Fichot, J A Fuhrman, W M Berelson, S Sanudo-Wilhelmy (2018). Distribution of extracellular flavins in a coastal marine basin and their relationship to redox gradients and microbial community members, Environmental Science and Technology , 52, 12265-12274.

J J Baronas, D E Hammond, J McManus, C G Wheat, C Siebert (2017). A global Ge isotope budget, Geochimica et Cosmochimica Acta , 203, 265-283.

J J Baronas, M A Torres, K E Clark, A J West (2017). Mixing as a driver of temporal variations in river hydrochemistry: 2. Major and trace element concentration dynamics in the Andes-Amazon transition, Water Resources Research , 53, 3120-3145.

M A Torres, J J Baronas, K E Clark, S J Feakins, A J West (2017). Mixing as a driver of temporal variations in river hydrochemistry: 1. Insights from conservative tracers in the Andes-Amazon transition, Water Resources Research , 53, 3102-3119.

J J Baronas, D E Hammond, W M Berelson, J McManus, S Severmann (2016). Germanium--silicon fractionation in a river-influenced continental margin: The Northern Gulf of Mexico, Geochimica et Cosmochimica Acta , 178, 124-142.

W Z Haskell, M G Prokopenko, D E Hammond, R H Stanley, W M Berelson, J J Baronas, J C Fleming, L Aluwihare (2016). An organic carbon budget for coastal Southern California determined by estimates of vertical nutrient flux, net community production and export, Deep Sea Research Part I: Oceanographic Research Papers , 116, 49-76.