GEOMAR  Kemena, Tronje

Dr. Tronje Kemena

Scientific Programmer and Data Scientist in the FE Biogeochemical Modelling

[Translate to English:] Tronje Kemena Portrait

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

Jump to: Articles in a Scientific Journal - peer-reviewed | Articles in a Scientific Journal - without review | Conference papers | Presentations | Conference posters | Theses - not published by a publisher | Reports - other reports | Dataset
Number of items: 18.

Articles in a Scientific Journal - peer-reviewed

[thumbnail of os-21-1167-2025.pdf] [thumbnail of os-21-1167-2025-supplement.pdf]

Guo, H., Koeve, W. , 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. Open Access Ocean Science, 21 (3). pp. 1167-1182. DOI 10.5194/os-21-1167-2025.

[thumbnail of Wey_2025_Environ._Res._Lett._20_054029.pdf]

Wey, H. W. , 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. Open Access Environmental Research Letters, 20 . Art.Nr. 054029. DOI 10.1088/1748-9326/adc617.

[thumbnail of esd-10-539-2019.pdf] [thumbnail of esd-10-539-2019-supplement.pdf]

Kemena, T. P. , 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. Open Access Earth System Dynamics, 10 (3). pp. 539-553. DOI 10.5194/esd-10-539-2019.

[thumbnail of s41561-019-0359-x.pdf] [thumbnail of 41561_2019_359_MOESM1_ESM.pdf]

Wallmann, K. , 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.

[thumbnail of 10.1007_s00382-017-3890-8.pdf]

Kemena, T. P. , 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. Open Access Earth System Dynamics, 8 (2). pp. 357-367. DOI 10.5194/esd-8-357-2017.

Articles in a Scientific Journal - without review

[thumbnail of TrackingGS_OS_manuscript_v13.pdf]

Garcia-Suarez, L., Fennel, K., Mehendale, N., Kemena, T. P. and Keller, D. P. (Submitted) Temperature-based Diagnosis of the Gulf Stream Path Overestimates a Northward Shift in a Warming Ocean. Open Access ESS Open Archive . DOI 10.22541/essoar.173758192.24328151/v2.


Hill-Cruz, M. , Xue, T. , Hauschildt, J., Gutiérrez, M. and Kemena, T. P. (Submitted) Supervised and unsupervised machine learning methods for modelling current and future habitat of Peruvian anchovy. Open Access bioRxiv - the preprint server for biology . DOI 10.1101/2025.05.08.652876.

Conference papers

[thumbnail of paper-Schaffarczyk-DEWEK-2008.pdf]

Schaffarczyk, A. P. and Kemena, T. (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


Hill, M. , 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 .


Mehendale, N., Kemena, T. P. , 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 .


Mehendale, N., Wey, H. W. , 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

[thumbnail of Kemena_CESymposiumBerlin_2015.pdf]

Kemena, T. , 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

[thumbnail of Kemena_PhDThesis_2018.pdf]

Kemena, T. P. (2017) Assessment of Feedbacks in the Earth System under Anthropogenic Forcing: Two Case Studies. Open Access (PhD/ Doctoral thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 114, XX pp.

[thumbnail of MasterThesisKemena834551.pdf]

Kemena, T. (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

[thumbnail of OceanNETs_Deliverable_D5.8_v03May.pdf]

Schartau, M. , Pahlow, M., Kemena, T. P. , Lampe, V. , Taucher, J. and Seifert, M. (2024) New/refined parameterizations for modelling ocean alkalinization effects on biogeochemistry and plankton dynamics. Open Access . OceanNets Deliverable, D5.8 . OceanNETs, Kiel, Germany, 34 pp. DOI 10.3289/oceannets_d5.8.

[thumbnail of D4.3_v1.pdf]

Keller, D. P. , 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. Open Access . OceanNets Deliverable, D4.3_v1 . OceanNETs, Kiel, Germany, 29 pp. DOI 10.3289/oceannets_d4.3_v1.

Dataset


Schartau, M. , 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. Open Access [Dataset]

This list was generated on Fri Dec 5 05:37:38 2025 CET.