Dr. Tronje Kemena
Scientific Programmer and Data Scientist in the FE Biogeochemical Modelling
![[Translate to English:] Tronje Kemena Portrait](/fileadmin/_processed_/5/8/csm_Tronje_portrait_small_902f729926.jpg)
Office:
Room 5.506
Tower 5, Floor 5
Tel.: +49 431 600–4039
e-mail: tkemena(at)geomar.de
Address:
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel
Wischhofstraße 1–3
24148 Kiel
Research Interests
Support and operation of the FOCI model for the BM group. Focus on data analysis, machine learning projects, and the development of data processing tools.
Publications
Number of items: 27.
Articles in a Scientific Journal - peer-reviewed
, Xue, T. , Hauschildt, J., Gutiérrez, M. and Kemena, T. P.
(2026)
Supervised and unsupervised machine learning methods for modelling current and future habitat of Peruvian anchovy.
Frontiers in Climate, 8
.
Art.Nr. 1887595.
DOI 10.3389/fclim.2026.1887595.
, Kemena, T. P. and Keller, D. P.
(2026)
Assessing the global potential of Expanding Coastal Vegetated Ecosystems as a Carbon Dioxide Removal Method: results from a parameterization in an Earth System Model.
Frontiers in Climate, 8
.
Art.Nr. 1832856.
DOI 10.3389/fclim.2026.1832856.
and Keller, D. P.
(2026)
Temperature-based Diagnosis of the Gulf Stream Path Overestimates a Northward Shift in a Warming Ocean.
Ocean Science, 22
(2).
pp. 1183-1193.
DOI 10.5194/os-22-1183-2026.
, Oschlies, A. , He, Y. C., Kemena, T. P. , Gerke, L. and Kriest, I.
(2025)
Dual-tracer constraints on the Inverse-Gaussian Transit-time distribution improve the estimation of watermass ages and their temporal trends in the tropical thermocline.
Ocean Science, 21
(3).
pp. 1167-1182.
DOI 10.5194/os-21-1167-2025.
, Moustakis, Y., Nützel, T., Oschlies, A. , Schwinger, J., Hajima, T., Fisher, R., Ziehn, T., Liddicoat, S. K., Kemena, T. P. and Keller, D.
(2025)
CMIP6 Models agree on similar carbon cycle feedbacks between enhancing terrestrial and marine carbon sinks.
Environmental Research Letters, 20
.
Art.Nr. 054029.
DOI 10.1088/1748-9326/adc617.
, Oschlies, A. , Wallmann, K. J. G. , Landolfi, A. and Dale, A. W.
(2019)
Ocean phosphorus inventory: large uncertainties in future projections on millennial timescales and their consequences for ocean deoxygenation.
Earth System Dynamics, 10
(3).
pp. 539-553.
DOI 10.5194/esd-10-539-2019.
![[thumbnail of s41561-019-0359-x.pdf]](https://oceanrep.geomar.de/style/images/fileicons/text.png)
, Flögel, S., Scholz, F., Dale, A. W. , Kemena, T. P. , Steinig, S. and Kuhnt, W.
(2019)
Periodic changes in the Cretaceous ocean and climate caused by marine redox see-saw.
Nature Geoscience, 12
(6).
pp. 456-461.
DOI 10.1038/s41561-019-0359-x.
, Matthes, K. , Martin, T. , Wahl, S. and Oschlies, A.
(2018)
Atmospheric feedbacks in North Africa from an irrigated, afforested Sahara.
Climate Dynamics, 50
(11-12).
pp. 4561-4581.
DOI 10.1007/s00382-017-3890-8.
Niemeyer, D. , Kemena, T. P. , Meissner, K. J. and Oschlies, A.
(2017)
A model study of warming-induced phosphorus-oxygen feedbacks in open-ocean oxygen minimum zones on millennial timescales.
Earth System Dynamics, 8
(2).
pp. 357-367.
DOI 10.5194/esd-8-357-2017.
, Kemena, T. P. , Meissner, K. J. and Oschlies, A.
(2017)
A model study of warming-induced phosphorus-oxygen feedbacks in open-ocean oxygen minimum zones on millennial timescales.
Earth System Dynamics, 8
(2).
pp. 357-367.
DOI 10.5194/esd-8-357-2017.
Articles in a Scientific Journal - without review
, Kemena, T. P. and Oschlies, A.
(Submitted)
A comparison of metrics for CO 2 uptake efficiency of regional ocean alkalinity enhancement in an Earth system model.
Biogeosciences (BG)
.
DOI 10.5194/egusphere-2026-4781.
, Kemena, T. P. and Guo, H.
(Submitted)
Tuning ocean biogeochemistry for an Earth system model: approaches, challenges and impact on model performance.
Geoscientific Model Development (GMD)
.
DOI 10.5194/egusphere-2026-3423.
Conference papers
(2008)
A Simplified Model for Fatigue Load Calculations of Small Wind- Turbines with Vertical Axis of Rotation.
[Paper]
In: DEWEK 2008. , 26.-27.11.2008, Bremen, Germany .
Presentations
, Mehendale, N. and Kemena, T.
(2025)
Impacts of Simulated Coastal Ocean Alkalinity Enhancement on the Seasonal Cycle of CO2 Air-Sea Gas Exchange and ocean pCO2 in European Waters under Low and High Emission Scenarios.
[Talk]
In: EGU General Assembly 2025. , 27.04.2025-02.05.2025, Vienna, Austria / online .
, Xue, T. , Hauschildt, J. , Gutierrez, M. and Kemena, T. P.
(2025)
Modelling the distribution of Peruvian anchovies under a changing climate.
[Talk]
In: Association for the Sciences of Limnology and Oceanography (ASLO) 2025 Aquatic Sciences Meeting. , 26.-31.03.2025, Charlotte, North Carolina, USA .
, Keller, D. P. and Oschlies, A.
(2024)
Regional differences in uptake during simulation of ocean alkalinity enhancement in an Earth system model.
[Talk]
In: Ocean Science Meeting 2024. , 18.-23.02.2024, New Orleans, USA .
, Kemena, T. P. , Keller, D. P. and Oschlies, A.
(2023)
Simulating Ocean Alkalinity Enhancement along the European Coast in an Earth System Model.
[Talk]
In: EGU General Assembly 2023. , 24.-28.4.2023, Vienna, Austria .
Conference posters
, Matthes, K. , Martin, T. , Wahl, S. and Oschlies, A.
(2015)
Climatic impacts of irrigated afforestation of the Sahara in a complex Earth System Model.
[Poster]
In: Climate Engineering Research Symposium 2015. , 07.-10.07.2015, Berlin, Germany .
Theses - not published by a publisher
(2017)
Assessment of Feedbacks in the Earth System under Anthropogenic Forcing: Two Case Studies.
(PhD/ Doctoral thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 114, XX pp.
(2014)
Impact of the carbon cycle on the development of a Snowball Earth.
(Master thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 63 pp.
Reports - other reports
, Pahlow, M., Kemena, T. P. , Lampe, V. , Taucher, J. and Seifert, M.
(2025)
New/refined parameterizations for modelling ocean alkalinization effects on biogeochemistry and plankton dynamics - Version 2.0.
.
OceanNets Deliverable, D5.8
.
OceanNETs, Kiel, Germany, 36 pp.
DOI 10.3289/oceannets_d5.8_v2.0.
, Mehendale, N. and Kemena, T. P.
(2023)
Analysis (report) of high- resolution modelling of efficacy, and regional impacts of selected ocean NETs close to the
deployment sites.
.
OceanNets Deliverable, D4.3_v1
.
OceanNETs, Kiel, Germany, 29 pp.
DOI 10.3289/oceannets_d4.3_v1.
Dataset
, Guo, H. and Kemena, T. P.
(2026)
Tuning ocean biogeochemistry for an Earth system model: approaches, challenges and impact on model performance (Version v1).
[Dataset]
DOI 10.5281/zenodo.19048349.
, Kemena, T. P. and Guo, H.
(2026)
Supplementary data for: Tuning ocean biogeochemistry for an Earth system model: approaches, challenges and impact on model performance.
[Dataset]
, Koeve, W. , Oschlies, A. , Yanchun, H., Kemena, T. P. , Gerke, L. and Kriest, I.
(2025)
Supplementary Data to "Dual-tracer constraints on the Inverse-Gaussian Transit-time distribution improve the estimation of watermass ages and their temporal trends in the tropical thermocline".
[Dataset]
, Pahlow, M. , Kemena, T. P. , Lampe, V. , Taucher, J. and Seifert, M.
(2025)
OceanNETs Deliverable D5.8: New/refined parameterizations for modelling ocean alkalinization effects on biogeochemistry and plankton dynamics.
[Dataset]
, Keller, D. P. , Kemena, T. P. and Chien, C. T.
(2025)
Dataset used in the article "Degrees of reversibility of ocean deoxygenation in an atmospheric carbon dioxide removal scenario".
[Dataset]
DOI 10.5281/zenodo.14961525.
and Keller, D. P.
(2025)
Processed outputs from the CM2.6 and FOCI climate models used to investigate how temperature-based diagnosis of the Gulf Stream path overestimates its northward shift (Garcia-Suarez et al., 2026; OS) (Version v1).
[Dataset]
DOI 10.5281/zenodo.14644833.
