Sara Trojahn

Sara Trojahn
James Hutton Institute · Environmental and Biochemical Sciences Group

Doctor of Philosophy
Biogeochemist at the James Hutton Institute working on the Carri Project.


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Citations since 2017
4 Research Items
1 Citation
I am a Biogeochemist @JamesHuttonInstitute. My research interests are broad and cover generally organic matter interactions between the land-water-atmosphere. Currently my research is focusing on the soil-water biogeochemistry in river corridors.
Additional affiliations
February 2021 - November 2022
University of Innsbruck
  • PostDoc Position
February 2017 - February 2021
Heriot-Watt University
  • PhD Student
September 2015 - present
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research
  • Master's Student
February 2017 - February 2021
Heriot-Watt University
Field of study
  • Geoscience
October 2013 - May 2016
Universität Bremen
Field of study
  • Biogeochemistry, Sedimentology and Hydrogeology
October 2009 - September 2012
Martin Luther University Halle-Wittenberg
Field of study
  • Hydrogeology and Hydrochemistry


Publications (5)
Full-text available
Connecting tropical rainforests to larger rivers, tropical headwaters export large quantities of carbon and nutrients as dissolved organic matter (DOM), and are thus a key component of the global carbon cycle. This DOM transport is not passive, however; sunlight and microbial activity alter DOM concentrations and compositions, affecting riverine gr...
Since 2017, we investigated iDOM in tropical and temperate rivers across Amazonia and Scotland using the next-generation liquid chromatography organic carbon detection – organic nitrogen detection system utilised by Pereira et al. (2014). Monthly sampling of rivers including the Cree, the Clyde and the Forth show evidence for iDOM mobilisation, but...
We investigated the riverine carbon exports from a two headwater peatland environments in the UK, and examined the potential uncertainty of quantification due to the role of optically “invisible” dissolved organic matter (iDOM). Importantly, our work captured compositional changes of riverine DOM in during an exceptionally dry period and compared t...
My study area is the Lena river one of the biggest Siberian rivers in terms of water and sediment discharge. The watershed is divided into two vegetation zone: the taiga zone and a small tundra zone in the north. The river is covered by a thick ice layer (∼2m) from October to late May/June and during the spring ice breakup and snowmelt in late May...


Cited By


Project (1)
This PhD project will assess the potential for intense periods of hydrological activity to dominate the POM and DOM transported from soils into rivers and assess the mechanisms that are responsible for the mobilisation, transport and storage of reactive C in selected natural and disrupted (e.g. peat extraction, agriculture) environments. Furthermore, this study will examine the characteristics of DOM in terms of composition and reactivity from different environments under changing environmental controls in laboratory experiments.