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Seitenpfad:

Dr. Jan Kleint

Postdoktorand_innen

Gruppe: 

Organische Geochemie

Telefon: 

+49 421 218-65747

Fax:

+49 421 218-65715

E-Mail:

Raum: 

MARUM I, 2530

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

 

MARUM/MPI ISMS

 

 

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 

 

Shematic setup of the vent fluid sampling system

 

 

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).

MovingWire MARUM



 

 
 
 

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

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 –
08/2022

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
&
01-03/2013

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

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.