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Dr. Jan Kleint

Group: 

Organic Geochemistry

Phone: 

+49 421 218-65747

Fax:

+49 421 218-65715

Email:

Room: 

MARUM I, 2530

External Profiles: 

OrcID | Google Scholar

Jan Kleint

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

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

more

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)

more

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
2020

Postdoctoral Fellow and Research Associate
MARUM, University of Bremen, Bremen

Method development and integration of novel in situ underwater instruments (such as in situ mass spec or fluid sampling systems) and lab-based systems

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

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
2014 – 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

2014 – 2018

Research Associate
Heidelberg University, Institute of Earth Sciences

2011 – 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)

2008 – 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)

Research Cruises and Sampling Campaigns

Research cruises

2024

RV MARIA S MERIAN MSM125

Equipment and system integration tests of e.g. the in situ mass spectrometer and a re­cently pur­chased sensor for de­tect­ing fluor­es­cent dis­solved or­ganic mat­ter (fDOM) un­der deep-sea con­di­tions on ROV SQUID (Gulf of Cadiz, North Atlantic)

2023

RV METEOR M190

Deployment of the in situ mass spectrometer on ROV Quest at hydrothermal fields along the Mid-Atlantic Ridge (North Atlantic)

2022

RV MARIA S MERIAN MSM109

Deployment of the in situ mass spectrometer on ROV Quest at Jøtul hydrothermal field (Knipovich Ridge, North Atlantic)
2022

RV HEINCKE HE591*

Equipment tests of in situ mass spectrometers
* shortened due to bad weather conditions (officially "stayed in port")
2019

RV POLARSTERN PS120

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“

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
2016 - 2017

RV SONNE SO253 „HYDROTHERMADEC“

Fluid geochemistry (ROV QUEST, CTD, trace metal clean rosette, in-situ pumps)
2016

RV HEINCKE HE475

Porewater and sediment geochemistry (IMGAM-AUV, MUC)
2015

RV SONNE SO240 „FLUM“

Porewater and sediment geochemistry (gravity and piston corer, MUC)
2011

RC UTHÖRN

Porewater and sediment geochemistry (gravity corer, MUC)
2010

RV HEINCKE HE337

Porewater and sediment geochemistry (gravity corer, MUC)

Sampling Campaigns
2017 - 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
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

Bohrmann, G., Streuff, K., Römer, M., Knutsen, S.M., Smrzka, D. , Kleint, J., Röhler, A., Pape, T., Sandstå, N.R., Kleint, C., Hansen, C., dos Santos Ferreira, C., Walter, C., Macedo de Paula Santos, G., Bach, W. (2024), Discovery of the first hydrothermal field along the 500-km-long Knipovich Ridge offshore Svalbard (the Jøtul field). Sci Rep 14, 10168 . https://doi.org/10.1038/s41598-024-60802-3

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.

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

Public Outreach

2023

Was haben uns organische Moleküle über Umwelt und Klima zu sagen?
engl.: What do organic molecules tell us about the environment and climate?

Science Goes Public
(Gastfeld, Bremen)
2019-2023

Wissenschaftler in den marinen Geowissenschaften
engl.: Working as a scientist in the marine geosciences

part of the lecture "Geowissenschaftliche Berufsfelder" (Heidelberg University)
(mostly online)
2021

Forschung in der Tiefsee
engl.: Deep sea research

Tagung Schule MIT Wissenschaft Thüringen
(online)
2019

Zwischen Tiefsee und ewigem Eis
engl.: Between the deep sea and eternal ice

Verein zur Förderung von Umweltbildung und römischer Geschichte