Sedimentologie & marine Paläoumweltdynamik
Alexa Fischer, M.Sc.
Adresse: |
Institut für Geowissenschaften |
Ruprecht-Karls-Universität Heidelberg |
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Im Neuenheimer Feld 234 |
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D-69120 Heidelberg |
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Raum: |
218 |
Telefon: |
+49 (0)6221-54 5988 |
E-Mail: |
Forschungsschwerpunkte:
The long-term global cooling trend during the latest Cretaceous was interrupted by an intense global warming episode at ~69 Ma known as the mid Maastrichtian event (MME). Changes in oceanic circulation, particularly a change in thermohaline circulation patterns, have been proposed to be one of the main drivers of the MME. Nevertheless, the driving mechanisms, timing, character, and consequences of the circulation change are still up for debate. My research focuses on understanding the climatic patterns causing the MME, as well as on unraveling the drivers of the potential circulation change during the MME and on further assessing the biotic and climatic effects of the MME.
For that purpose, a multiproxy approach is used:
- Sea Surface Temperature (SST) reconstructions from planktic foraminiferal Mg/Ca
- Bottom Water temperature (BWT) reconstruction from benthic foraminiferal Mg/Ca
- Stable isotope analysis (d13C and d18O) on planktic and benthic foraminifera
Akademischer Lebenslauf:
seit 09/2021 |
Doktorandin am Institut für Geowissenschaften, Ruprecht-Karls Universität, Heidelberg. Betreuer: Prof. Dr. Oliver Friedrich |
08/2021 |
Master of Science, Masterarbeit: “Single Foraminifera Na/Ca and Mg/Ca analyses derived from Globigerinoides ruber using femtosecond-LA-ICP-MS” Betreuer: Dr. Ralf Schiebel, Prof. Dr. D. Scholz |
04/2020 - 08/2021 |
Masterstudium Geowissenschaften, Johannes Gutenberg-Universität Mainz |
04/2020 |
Bachelor of Science, Bachelorarbeit: “Nitrogen isotopes in the marine environment” Betreuer: Dr. Ralf Schiebel, Prof. Dr. D. Scholz |
10/2016 - 04/2020 |
Bachelorstudium Geowissenschaften, Johannes Gutenberg-Universität Mainz |
Forschungserfahrung:
05/2017 – 08/2021: Studentische Mitarbeiterin, Max-Planck-Institut für Chemie, Klimageochemie
Grants/Awards:
2022 ECORD Scholarship for the Urbino Summer School in Paleoclimatology (Urbino, Italy)
Beiträge zu Konferenzen:
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Fischer, A., Friedrich, O., Bahr, A., Voigt, S. 2023. A new high resolution stable isotope record from the North Atlantic Ocean: a detailed insight into the mid-Maastrichtian event. EGU General Assembly, Vienna, Austria, 23/04/23 – 28/04/23 [Poster]
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Fischer, A., Friedrich, O., Bahr, A., Voigt, S. 2022. Are hyperthermal events a persistent feature of greenhouse climates? Joint IODP/ICDP Meeting 01/11/22 – 03/11/22 [Poster]
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Fischer, A., Friedrich, O., Bahr, A., Voigt, S. 2022. Are hyperthermal events a persistent feature of greenhouse climates? 14th International Conference on Paleoceanography (ICP14), Bergen, Norway, 29/08/22 – 2/09/22 [Poster]
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Fischer, A., Friedrich, O., Bahr, A., Voigt, S. 2022. Are hyperthermal events a persistent feature of greenhouse climates? 12th international Conference on Climatic and Biotic Events of the Paleogene (CBEP12), Bremen, 22. – 25. Aug. 2022 [Poster]
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Fischer, A., Friedrich, O., Bahr, A., Voigt, S. 2022. Are hyperthermal events a persistent feature of greenhouse climates? Ecord Summer School, Urbino, 07/07/22 – 20/07/22 [Poster]
- Fischer, A., Aardema, H.M., Smart, S.M., Repschläger, J., Martinez-Garcia, A., Scholz, D., Schiebel, R., Haug, G.H., 2020. Foraminifera-bound 15N and NO3- 15N in the North Atlantic Ocean. S/Y-Eugen Seibold conference [Poster].