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- Jan Kleint
Dr. Jan Kleint |
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Postdoktorand_innen |
Gruppe: |
Organische Geochemie |
Telefon: |
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Fax: |
+49 421 218-65715 |
E-Mail: |
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Raum: |
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, O2 at 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
Development of a ROV-based fluid sampling system
Project Goal: trace-metal clean and/or isobaric fluid sampling (gas-tight) as well as a filtration system during ROV dives
The foundation of the planned sampling system is the Kiel Pumping System (KIPS) developed by Dr. Dieter Garbe-Schönberg, University of Kiel. KIPS is an inert, temperature-resistant, modular, and remotely controlled fluid sampling system for the storage of 4 samples with up to 750 ml volume per ROV dive. In its current configuration, the KIPS is limited to 4 sample flasks that can be filled per ROV dive, but lacks the option of gas-tight fluid sampling and in situ filtration. In order to overcome these limitations, we are upgrading the existing 4-bottle KIPS system to include 4 additional sample bottles that are designed to allow for isobaric fluid sampling (gas-tight) as well as a filtration system, where a separately mounted peristaltic pump can be used for adding fixatives for subsequent biogeochemical analyses.
The new setup for vent fluid sampling consists of 5 major units: (1) a temperature sensor, (2) trace metal unit (former KIPS), (3) a gas-tight unit, (4) a filtration unit and (5) a new control unit (see Figure below)
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 |
Postdoctoral Fellow and Research Associate 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 |
Postdoctoral Fellow and Research Associate 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 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) 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 |
10/2011 – 04/2014 |
Master Studies („Geowissenschaften”, M.Sc.) 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.) 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 |
2019 |
Environmental Award |
2012 |
Deutschlandstipendium |
Research Cruises and Sampling Campaigns
06/2023 –07/2023 |
RV METEOR M190 Deploymentof the in situmass spectrometer on ROV Quest at hydrothermal fields along the Mid-Atlantic Ridge (North Atlantic) |
07/2022 – |
RV MARIA S MERIAN MSM109 Deploymentof the in situmass spectrometer on ROV Quest at Jøtul hydrothermal field (Knipovich Ridge, North Atlantic) |
02/2022 |
RV HEINCKE HE591 Equipment testsof in situmass spectrometers |
05/2019 – 06/2019 |
RV POLARSTERN PS120 Continuous in-situ measurements of carbon dioxide (CO2) and methane (CH4) concentration and its stable carbon isotope values (δ13C-CO2and δ13C-CH4) in ocean surface water |
04/2019 |
RV LUDWIG PRANDTL„MOSES“ Continuous in-situ measurements of carbon dioxide (CO2) and methane (CH4) concentration and its stable carbon isotope values (δ13C-CO2and δ13C-CH4) in surface water |
12/2016 – 01/2017 |
RV SONNE SO253„HYDROTHERMADEC“ Fluid geochemistry(ROV QUEST, CTD, trace metal clean rosette, in-situ pumps) |
10/2016 – 11/2016 |
RV HEINCKE HE475 Porewater and sediment geochemistry(IMGAM-AUV, MUC) |
05/2015 – 06/2015 |
RV SONNE SO240„FLUM“ Porewater and sediment geochemistry(gravity and piston corer, MUC) |
07/2011 |
RC UTHÖRN Porewater and sediment geochemistry(gravity corer, MUC) |
09/2010 |
RV HEINCKE HE337 Porewater and sediment geochemistry(gravity corer, MUC) |
Sampling Campaigns
05/2017 –01/2019 |
Lake Willersinnweiher, Ludwigshafen am Rhein, Germany Quarterly water column and sediment sampling of different redox species as well as CH4concentration and its stable carbon isotopic composition |
08/2017 |
Lake Erken, Uppsala, Sweden Continuous in-situ measurements and depth profiles of CH4concentration and its isotopic composition |
07/2017 |
Lake Stechlin, Lake Lab, Berlin, Germany Continuous in-situ measurements and depth profiles of CH4concentration and its isotopic composition |
08/2016 |
Eiffel, Germany Measurements of CH4concentration and its isotopic composition in an ant hill as well as in the surrounding atmosphere |
07/2015 & 08/2015 |
Lake Stechlin, Lake Lab, Berlin, Germany Continuous in-situ measurements and depth profiles of CH4concentration and its isotopic composition |
01-03/2012 |
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
Einzmann T., Schroll M., Kleint J.F., Greule M. and Keppler F. (2022), Application of concentration and 2- dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake. Front. Environ. Sci. 10:865862. 10.3389/fenvs.2022.865862
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.