Forschungsinteressen

• Untersuchung des Kohlenstoffkreislaufs im arktischen Permafrost,
• Methodenentwicklung zur Probenahme und Aufbereitung von respiriertem CO₂ für die ¹⁴C-Analytik,
• Biogeochemie stabiler Isotope (insbesondere δ¹³C & δ³⁴S)

Lebenslauf

Publikationen

peer-reviewte Fachzeitschriften:

• Rethemeyer, J.; Gierga, M.; Heinze, S.; Stolz, A.; Wotte, A.; Wischhöfer, P.; Berg, S.; Melchert, J.; Dewald, A. (2019) Current sample preparation and analytical capabilities of the radiocarbon laboratory at CologneAMS, Radiocarbon. DOI: 10.1017/RDC.2019.16.
• Stolz, A.; Dewald A.; Heinze, S.; Altenkirch, R.; Hackenberg, G.; Herb, S.; Müller-Gatermann, C.; Schiffer, M.; Zitzer, G.; Wotte, A.; Rethemeyer, J.; Dunai, T. (2019) Improvements in the measurement of small ¹⁴CO₂ samples at CologneAMS, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, v. 439, p. 70–75. DOI: 10.1016/j.nimb.2018.12.008.
• Wordell-Dietrich, P.; Don, A.; Wotte, A.; Rethemeyer, J.; Bachmann, J.; Helfrich, M.; Kirfel, K.; Leuschner, C. (2019) Vertical partitioning of CO₂ production in a Dystric Cambisol. Biogeosciences Discussion. DOI: 10.5194/bg-2019-143.
• Wotte, A.; Wischhöfer, P.; Wacker, L.; Rethemeyer, J. (2017) ¹⁴CO₂ analysis of soil gas: Evaluation of sample size limits and sampling devices, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, v. 413, p. 51–56. DOI: 10.1016/j.nimb.2017.10.009.
• Stolz, A.; Dewald A.; Altenkirch, R.; Herb, S.; Heinze, S.; Schiffer, M.; Feuerstein, C.; Müller-Gatermann, C.; Wotte, A.; Rethemeyer, J.; Dunai, T. (2017) Radiocarbon measurements of small gaseous samples at CologneAMS, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, v. 406, p. 283–286. DOI: 10.1016/j.nimb.2017.03.031.
• Wotte, A.; Wordell-Dietrich, P.; Wacker, L.; Don, A.; Rethemeyer, J. (2017) ¹⁴CO₂ processing using an improved and robust molecular sieve cartridge, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, v. 400, p. 65–73. DOI: 10.1016/j.nimb.2017.04.019.
• Cording, A.; Hetzel, R.; Kober, M.; Kley, J. (2014) ¹⁰Be exposure dating of river terraces at the southern mountain front of the Dzungarian Alatau (SE Kazakhstan) reveals rate of thrust faulting over the past ~400 ka, Quaternary Research, v. 81, p. 168–178. DOI: 10.1016/j.yqres.2013.10.016.
• Strauss, H.; Bast, R.; Cording, A.; Diekrup, D.; Fugmann, A.; Garbe-Schönberg, D.; Lutter, A.; Oeser, M.; Rabe, K.; Reinke, D.; Teichert, B.M.A.; Westernströer, U. (2012) Sulphur diagenesis in the sediments of the Kiel Bight, SW Baltic Sea, as reflected by multiple stable sulphur isotopes, Isotopes in Environmental and Health Studies, v. 48, p. 166–179. DOI: 10.1080/10256016.2012.648930.

Abstracts von Fachtagungen:

• Wischhöfer, P.; Wotte, A.; Melchert, J.; Rethemeyer, J. (2018) ¹⁴CO₂ analysis of soil emissions in the High Arctic reveal the degradation of old organic matter sources in permafrost soils, 5th EUCOP (European conference on Permafrost) 2018, June 21–July 1, Chamonix Mont-Blanc, France.
• Wotte, A.; Wischhöfer, P.; Knoblauch, C.; Rethemeyer, J. (2018) Vulnerability of Yedoma carbon to permafrost thaw – Insights from ¹⁴CO₂ analysis, 5th EUCOP 2018, June 21–July 1, Chamonix Mont-Blanc, France.
• Gierga, M.; Rethemeyer, J.; Wotte, A.; Wischhöfer, P.; Berg, S.; Patt, U.; John, S.; Heinze, S.; Dewald, A.; Wacker, L.; Welte, C. (2018) Progress report and methodical improvements in the radiocarbon analysis at the CologneAMS facility, Radiocarbon 2018, June 17–22, Trondheim, Norway.
• Melchert, J.; Stolz, A.; Dewald, A.; Wotte, A.; Wischhöfer, P.; Rethemeyer, J. (2018) Exploring sample size limits of AMS gas ion source ¹⁴CO₂ analysis, Radiocarbon 2018, June 17–22, Trondheim, Norway.
• Rethemeyer, J.; Wotte, A.; Martens, J.; Wischhöfer, P.; Mueller, C.W.; Wacker, L.; Heinze, S.; Dewald, A. (2018) Will ancient C in deep permafrost deposits be quickly respired upon thaw? Radiocarbon 2018, June 17–22, Trondheim, Norway.
• Stolz, A.; Dewald, A.; Heinze, S.; Altenkirch, R.; Hackenberg, G.; Herb, S.; Müller-Gatermann, C.; Schiffer, M.; Wotte, A.; Rethemeyer, J.; Dunai, T. (2018) Improvements in the measurement of small ¹⁴CO₂ samples at CologneAMS, Radiocarbon 2018, June 17–22, Trondheim, Norway.
• Wischhöfer, P.; Wotte, A.; Melchert, J.; Rethemeyer, J. (2018) Tracing the degradation of ancient organic carbon in permafrost-affected soils via 14C analysis of microbial, in-situ respired CO₂, Radiocarbon 2018, June 17–22, Trondheim, Norway.
• Björkman, M.P.; Boeckx, P.; Wotte, A.; Rethemeyer, J.; Lindwall, F.; Elberling, B.; Björk, R.G. (2018) The sensitivity of carbon in Arctic permafrost soils to climate change, 19th ITEX (International Tundra Experiment) Meeting, April 25–27, Stirling, Scotland, UK.
• Stolz, A.; Dewald, A.; Heinze, S.; Altenkirch, R.; Herb, S.; Schiffer, M.; Müller-Gatermann, C.; Dunai, T.; Wotte, A.; Rethemeyer, J. (2017) Radiocarbon Measurements of Small Gaseous Samples at CologneAMS, The 14th International Conference on Accelerator Mass Spectrometry, August 14–18, Ottawa, Canada.
• Stolz, A.; Dewald A.; Altenkirch, R.; Schiffer, M.; Feuerstein, C.; Müller-Gatermann, C.; Wotte, A.; Rethemeyer, J., Dunai, T. (2016) Radiocarbon Measurements of Small Gaseous Samples at CologneAMS, ECAART (European Conference on Accelerators in Applied Research and Technology) 2016, Juli 3–8, Jyväskylä, Finland.
• Cording, A.; Dietrich, P.; Wacker, L.; Don, A.; Rethemeyer, J. (2015) A molecular sieve cartridge (MSC) to collect soil CO₂ for radiocarbon dating – first tests and applications, SOM (International Symposium on Soil Organic Matter) 2015, September 20–24, Göttingen, Germany.
• Dietrich, P.; Don, A.; Cording, A.; Rethemeyer, J.; Flessa, H.; Helfrich, M. (2015) Sources of CO₂ production in subsoils, SOM 2015, September 20–24, Göttingen, Germany.
• Gomez-Saez, G.V.; Sollich, M.; Pop Ristova, P.; Cording, A.; Elvert, M.; Hinrichs, K.-U.; Bühring, S.I. (2013) Stable isotope probing of lipid biomarkers in a shallow water hydrothermal vent system off Milos Island (Greece), IMOG 2013: International Congress on Organic Geochemistry, September 15–20, Tenerife, Spain.
• Strauss, H.; Cabral, A.R.; Cording, A.; Koglin N. (2011) Multiple sulfur isotopic evidence for multiple origins of late Archean and early Paleoproterozoic sediment-hosted pyrite, Quadrilátero Ferrífero of Minas Gerais, Mineralogical Magazine, v. 75 (3), p. 1953.
• Wotte, T.; Strauss, H.; Fugmann, A.; Cording, A.; Rabe, K. (2010) δ³⁴S isotopes from carbonate associated sulfate and chromium-reducible sulfur from the traditional Lower-Middle Cambrian, Geochimica et Cosmochimica Acta, v. 74 (12), p. A1141.

weitere Publikationen:

• Wotte, A. (2018) Purification of CO₂ for AMS ¹⁴C analysis: Method development and application to permafrost deposits. PhD thesis, Universität zu Köln. https://kups.ub.uni-koeln.de/8474/
• Wischhöfer, P.; Wotte, A.; Rethemeyer, J. (2018) Carbon emissions and terrestrial carbon transport. Russian-German Cooperation: Expeditions to Siberia in 2017, Berichte zur Polar- und Meeresforschung. Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 725, p. 296.
• Wotte, A.; Rethemeyer, J. (2017) Carbon export from Siberian permafrost soils. Russian-German Cooperation: Expeditions to Siberia in 2016, Berichte zur Polar- und Meeresforschung. Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 709, p. 295.

Expeditionen & Workshops