Jan Kleint

Home
Jan Kleint

Dr. Jan Kleint
Postdocs

Group:	Organic Geochemistry
Phone:	+49 421 218-65747
Fax:	+49 421 218-65715
Email:	[Bitte aktivieren Sie Javascript]
Room:	MARUM I, 2530

Member of the HinrichsLab: https://www.marum.de/en/AG_Hinrichs.html
...and in joint projects with

MPI-MM Bremen (Department of Symbiosis - Prof. N. Dubilier) and
Leibniz Laboratory for Radiometric Dating and Stable Isotope Research (Christian-Albrechts-University of Kiel - Molecular Geobiology - Dr. F. Elling)

Current Projects

Integration of a ROV grade in situ mass spectrometer (ISMS)

Project Goal: in situ concentration analysis for e.g. H₂, CH₄, CO₂, O₂at seeps and vents as immediate guidance for sampling during ROV dives

The development of the new ISMS is a cooperation between MARUM and MPI-MM Bremen (Department of Symbiosis - Prof. N. Dubilier). The general setup of this system based on work by Prof. Pete Girguis (GirguisLab, Harvard University, US).

The ISMS is constructed to for deployments from both MARUM ROVs QUEST & SQUID. Future deployments might include CTD casts and/or an integration into long-term observatories.

Within this project, the initial setup (hardware components and software architecture) was modified to e.g. lower the limit of detection and by this, turning the instrument into a new prototype.

The development work includes:

construction and documentation using modern CAD systems (eg SolidWorks) for technical drawings
development of software and software packages to control and monitor the processes (e.g. vacuum system, sensors, mass spec) as well as data acquisition using the programming language Python
scientific work, including calibration and validation work in the laboratory and during research cruises

Construction of a "spooling wire microcombustion"-IRMS

Project Goal: Construction of a moving wire microcombustion system for high-precision analysis of intact GDGTs

The development of the "spooling wire microcombustion"-IRMS is a cooperation between the HinrichsLab and the "molecular geobiology" group at Kiel University (Molecular Geobiology - Dr. Felix Elling).

Curriculum Vitae

Since 03/2020	Postdoctoral Fellow and Research Associate MARUM, University of Bremen, Bremen Method development of a novel in situ underwater mass spectrometer for measurements of various gases (such as H₂, CO₂, CH₄ and H₂S) in the oceanic water column and at hydrothermal vents
01/2020 – 02/2020	Postdoctoral Fellow and Research Associate Max-Planck Institute for marine microbiology, Bremen Method development of a novel in situ underwater mass spectrometer for measurements of various gases (such as H₂, CO₂, CH₄ and H₂S) in the oceanic water column and at hydrothermal vents
01/2019 – 12/2019	Postdoctoral Fellow and Research Associate Alfred-Wegener Institute, Bremerhaven and Heidelberg University (Scientific cooperation) Method development of a novel en-route measuring system for the combined, continuous measurements of carbon dioxide (CO₂) and methane (CH₄) concentration and its stable carbon isotope values (δ¹³C-CO₂ and δ¹³C-CH₄) in ocean surface water onboard RV POLARSTERN
10/2014 – 10/2018	Promotion (Dr. rer. nat) Heidelberg University, Institute of Earth Sciences Title: „Methane Dynamics in Lakes” Supervisor: Prof. Dr. Margot Isenbeck-Schröter Method development of a novel measuring system for the continuous measurements of methane (CH₄) concentration and its stable carbon isotope value (δ¹³C-CH₄) in surface waters
05/2014 – 12/2018	Research Associate Heidelberg University, Institute of Earth Sciences
10/2011 – 04/2014	Master Studies („Geowissenschaften”, M.Sc.) Heidelberg University, Institute of Earth Sciences Title: „Entwicklung einer in situ-Methodik zur Bestimmung der Konzentration und δ¹³C-Isotopie von CH₄ und CO₂ in Wässern” (engl. Development of an in situ method for the determination of the concentration and δ¹³C-isotopic values of CH₄ and CO₂ in water)
10/2008 – 08/2011	Bachelor Studies („Geowissenschaften”, B.Sc.) Heidelberg University, Institute of Earth Sciences Title: „Arsenspezifizierung in Oberflächensedimenten der Nordsee“ (engl. Arsenic speciation in surface sediments of the North Sea)

Grants and Stipends

2020	KlarText-Award for Science Communication Klaus Tschira Foundation https://klartext-preis.de/preistraeger/dr-jan-hartmann/ (in german, only) Funding amount: € 7,500
2019	Environmental Award Viktor and Sigrid Dulger Foundation Funding amount: € 10,000
2012	Deutschlandstipendium Heidelberg University & Leonie-Wild-Foundation

Research Cruises and Sampling Campaigns

2022	Maria S Merian MSM109	Jøtul hydrothermal field (Knipovich Ridge) North Atlantic	Deployment of the in situ mass spectrometer on ROV Quest
2022	RV HEINCKE HE591	North Sea	Equipment tests of in situ mass spectrometers
2019	RV POLARSTERN PS120	Atlantic Ocean Transit	Continuous in-situ measurements of carbon dioxide (CO₂) and methane (CH₄) concentration and its stable carbon isotope values (δ¹³C-CO₂ and δ¹³C-CH₄) in ocean surface water
2019	RV LUDWIG PRANDTL „MOSES“	North Sea	Continuous in-situ measurements of carbon dioxide (CO₂) and methane (CH₄) concentration and its stable carbon isotope values (δ¹³C-CO₂ and δ¹³C-CH₄) in surface water
2016/2017	RV SONNE SO253 „HYDROTHERMADEC“	Kermadec Ridge South Pacific	Fluid geochemistry (ROV QUEST, CTD, trace metal clean rosette, in-situ pumps)
2016	RV HEINCKE HE475	North Sea	Porewater and sediment geochemistry (IMGAM-AUV, MUC)
2015	RV SONNE SO240 „FLUM"	East Pacific	Porewater and sediment geochemistry (gravity and piston corer, MUC)
2011	RC UTHÖRN	North Sea	Porewater and sediment geochemistry (gravity corer, MUC)
2010	RV HEINCKE HE337	North Sea	Porewater and sediment geochemistry (gravity corer, MUC)

Sampling Campaigns (on-shore)

2017-2019	Lake Willersinnweiher, Ludwigshafen am Rhein, Germany	Quarterly water column and sediment sampling of different redox species as well as CH₄ concentration and its stable carbon isotopic composition
2017	Lake Erken, Uppsala, Sweden	Continuous in-situ measurements and depth profiles of CH₄ concentration and its isotopic composition
2017	Lake Stechlin, Lake Lab, Berlin, Germany	Continuous in-situ measurements and depth profiles of CH₄ concentration and its isotopic composition
2016	Eiffel, Germany	Measurements of CH₄ concentration and its isotopic composition in an ant hill as well as in the surrounding atmosphere
2015	Lake Stechlin, Lake Lab, Berlin, Germany	Continuous in-situ measurements and depth profiles of CH₄ concentration and its isotopic composition
2012 & 2013	Carlini (former Jubany, King-George-Island, Antarctica)	Sampling of sediments (pore water and solid phase), analysis of different redox species and work in a clean lab

Publications in Peer-Reviewed Journals

ORCID-iD: https://orcid.org/0000-0002-7325-2028

Kleint, J.F., Wellach, Y., Schroll, M., Keppler, F., and Isenbeck-Schröter, M. (2021) The impact of seasonal sulfate–methane transition zones on methane cycling in a sulfate‐enriched freshwater environment. Limnol Oceanogr.https://doi.org/10.1002/lno.11754

Hartmann, J.F., Günthel, M., Klintzsch, T., Kirillin, G., Grossart, H.P., Keppler, F and Isenbeck-Schröter, M. (2020) High Spatiotemporal Dynamics of Methane Production and Emission in Oxic Surface Water. Environ. Sci. Technol. 2020, 54 (3), 1451–1463. https://doi.org/10.1021/acs.est.9b03182

Kleint, C.; Bach, W.; Diehl, A.; Fröhberg, N.; Garbe-Schönberg, D.; Hartmann, J. F.; de Ronde, C. E. J.; Sander, S. G.; Strauss, H.; Stucker, V. K.; Thal, J.; Zitoun, R.; Koschinsky, A. (2019) Geochemical Characterization of Highly Diverse Hydrothermal Fluids from Volcanic Vent Systems of the Kermadec Intraoceanic Arc. Chem. Geol. 528 (September), 119289. http://dx.doi.org/10.1016/j.chemgeo.2019.119289

Hartmann J.F., Gentz, T., Schiller, A., Greule, M., Grossart, H.P., Ionescu, D., Keppler, F., Martinez-Cruz, K., Sepulveda-Jauregui, A., and Isenbeck-Schröter M. (2018) A fast and sensitive method for the continuous in situ determination of dissolved methane and its δ¹³C-isotope ratio in surface waters. Limnol. Oceanogr. Methods (2018). https://doi.org/10.1002/lom3.10244

Henkel, S., Kasten, S., Hartmann, J. F., Silva-Busso, A., and Staubwasser, M. (2018) Iron cycling and stable Fe isotope fractionation in Antarctic shelf sediments, King George Island. Geochim. Cosmochim. Acta. 237, 320–338. https://doi.org/10.1016/j.gca.2018.06.042

Hartmann J.F., Gentz, T., Schiller, A., Greule, M., Grossart, H.P., Ionescu, D., Keppler, F., Martinez-Cruz, K., Sepulveda-Jauregui, A., and Isenbeck-Schröter M. (2017) Real Time Measurement of Concentration and δ¹³C-CH₄ in Water. Procedia Earth Planet. Sci. 17: 460–463. doi: 10.1016/j.proeps.2016.12.116

Keppler, F., Schiller, A., Ehehalt, R., Greule, M., Hartmann J.F. and Polag, D. (2016) Stable isotope and high precision concentration measurements confirm that all humans produce and exhale methane. J. Breath Res. 10: 16003. https://doi.org/10.1088/1752-7155/10/1/016003

Conferences and Workshops

Hartmann, J.F., Günthel, M., Klintzsch, T., Kirillin, G., Grossart, H.P., Keppler, F and Isenbeck-Schröter, M.: High Spatio-Temporal Methane Dynamics in Surface Waters: Between in situ Production and Emission (Talk), Goldschmidt 2019, Barcelona, Spain.

Hartmann, J.F., Wellach, Y., Isenbeck-Schröter, M., and Keppler, F.: Coupled Sulfur and Carbon Cycling in Limnic Sediments of Lake Willersinnweiher (SW-Germany) (Poster), Goldschmidt 2019, Barcelona, Spain.

Hartmann, J.F., Krägefsky, S., Eschenröder, J., Gentz, T. and Isenbeck-Schröter, M.: Development of novel en-route measuring system for continuous measurements of pCO2 in the surface water (Poster), Goldschmidt 2019, Barcelona, Spain.

Hartmann, J.F., Wellach, Y., Isenbeck-Schröter, M., and Keppler, F.: Freisetzungs- und Umsatzprozesse des Methans in einem Grundwasser-gespeisten Baggersee (Poster); Grundwasser im Umfeld von Bergbau, Energie und urbanen Räumen, 26. Tagung der Fachsektion Hydrogeologie e. V. in der DGGV e.V.,2018, Bochum, Germany.

Henkel, S., Kasten, S., Hartmann, J.F. and Staubwasser, M.: Iron Cycling and Isotope Fractionation in Shelf Sediments of King George Island, Antarctica; Goldschmidt 2017, Paris, France.

Kasten, S., Versteegh, G., Koschinsky, A., Villinger, H., Dohrmann, I., Fronzek, J.,
Hartmann, J.F., Kleint, C., Preuss, I., Ritter, S. and Kuhn, T.: Widespread diffusion of oxygen from oceanic crust into overlying sediments in the NE Pacific Ocean - Early diagenetic consequences and significance for biogeochemical cycles (RV SONNE cruise SO240); Goldschmidt 2017, Paris, France.

Hartmann, J.F., Schiller, A., Gentz, T. et al: Real Time Measurement of Concentration and δ¹³C - CH₄ in Water (Poster); 15th Water-Rock Interaction International Symposium 2016, Evora, Portugal.

Hartmann, J.F., Gentz, T., Al Najem, S., Freund, F., Scholz, C., and Isenbeck-Schröter, M.: Entwicklung einer in situ-Methodik zur Bestimmung der Konzentration und δ¹³C-Isotopie von CH₄ und CO₂ in Wässern (Poster); Jahrestagung der Arbeitsgemeinschaft Stabile Isotope e.V. 2015, Heidelberg, Germany.

Henkel, S., Kasten, S., Poulton, S. W., Hartmann, J. F. and Staubwasser, M.: Iron cycling in marine sediments - new insights from isotope analysis on sequentially extracted Fe fractions; AGU Fall Meeting 2014, San Francisco, USA.

Hartmann, J. F., Kasten, S., Krengel, T. and Isenbeck-Schröter, M.: Arsenic in surface sediments of a harbor sludge dumping site in the Helgoland Mud Area, North Sea (Poster); Goldschmidt 2013, Florence, Italy.

Workshops

„PCO₂ measuring techniques”, (invited Talk) Alfred Wegener Institute (AWI) Bremerhaven, Germany, September 2017.

“Picarro – Fluxes and isotopic measurements of Greenhouse Gases”, UGT Freising, Germany, October 2014.

“TRACE – Deep-reservoir analysis of hydrogeothermal aquifers” (Poster) Heidelberg University, Heidelberg, Germany, June 2014.

Dr. Jan Kleint