Dr Patricia Grasse

Postdoctoral Researcher

Current Research Projects


Due to ongoing unmitigated anthropogenic carbon dioxide (CO2) emissions, the world is experiencing global warming. In addition to the reduction of CO2 emissions, Negative Emission Technologies (NETs) are required to remove CO2 from the atmosphere. A very promising NET is enhancing the natural process of weathering as well as the associated process of (ocean) alkalinity enhancement ((O)AE), where ground minerals (e.g., olivine, carbonate, basalt) are spread over various habitats (marine, terrestrial) to enhance the flux of CO2 from the atmosphere to the soil/ocean and achieve subsequent burial.

My current research includes biogeochemical as well as socio-economic aspects in order to assess the potential and risks of marine NETs. The aim is to integrate biogeochemical observation into an integrated assessment model, providing initial insights on the role of OAE for climate policy. We also aim to chart the various open research questions for example with respect to transnational (pollution) impacts or the logistical supply chain and to supplement the numerical derivation of optimal climate policies with a scenario-based investigation of OAE on the Sustainable Development Goals (SDGs).

Strategies for the Evaluation and Assessment of Ocean based Carbon Dioxide Removal (SeaO2-CDR)

Ocean Alkalinity Enhancement: Integrating Biogeochemical Data into an Integrated Assessment Model (in cooperation with Dr. Wilfried Rickels)

REduce atmospheric Carbon by Alkalinity enhancement in intertidal environments: Potential and impacts (RECAP)


Curriculum Vitae


Short CV

  • since 2020 Researcher at the iDiv
  • June 2023 Guestprofessor at TU Graz (Austria)
  • 2016 to 2019 PostDoc at GEOMAR Helmholtz Centre for Ocean Research Kiel
  • 2015 Postdoctoral Fellowship at the University of California, Santa Barbara (USA)
  • 2012 to 2015 PostDoc at GEOMAR Helmholtz Centre for Ocean Research Kiel
  • 2008 to 2012 PhD candidate at the University of Kiel, Germany

ORCID: 0000-0002-1745-4418 (Link: https://orcid.org/0000-0002-1745-4418)

iDiv publications


Zhang, Zhouling, Yu, Yang, Hathorne, Ed C., Vieira, Lucia H., Grasse, Patricia, Siebert, Christopher, Rahlf, Peer, Frank, Martin

(2023): Decoupling of Barium and Silicon at the Congo River-Dominated Southeast Atlantic Margin: Insights From Combined Barium and Silicon Isotopes. Global Biogeochemical Cycles

Laukert, G., Grasse, P., Novikhin, A., Povazhnyi, V., Doering, K., Hölemann, J., Janout, M., Bauch, D., Kassens, H., Frank, M.        

(2022): Nutrient and Silicon Isotope Dynamics in the Laptev Sea and Implications for Nutrient Availability in the Transpolar Drift. Global Biogeochemical Cycles

Krahmann, G., Arévalo-Martínez, D. L., Dale, A. W., Dengler, M., Engel, A., Glock, N., Grasse, P., Hahn, J., Hauss, H., Hopwood, M. J., Kiko, R., Loginova, A. N., Löscher, C. R., Maßmig, M., Roy, A. S., Salvatteci, R., Sommer, S., Tanhua, T., Mehrtens, H.

(2021): Climate-Biogeochemistry Interactions in the Tropical Ocean: Data Collection and Legacy. Frontiers in Marine Science

Grasse, P., Haynert, K., Doering, K., Geilert, S., Jones, J. L., Brzezinski, M. A., Frank, M.

(2021): Controls on the Silicon Isotope Composition of Diatoms in the Peruvian Upwelling. Frontiers in Marine Science

A. W. Dale, K. M. Paul, D. Clemens, F. Scholz, U. Schroller-Lomnitz, K. Wallmann, S. Geilert, C. Hensen, A. Plass, V. Liebetrau, P. Grasse, S. Sommer

(2021): Recycling and Burial of Biogenic Silica in an Open Margin Oxygen Minimum Zone. Global Biogeochemical Cycles

K. Doering, C. Ehlert, K. Pahnke, M. Frank, R. Schneider, P. Grasse

(2021): Silicon Isotope Signatures of Radiolaria Reveal Taxon-Specific Differences in Isotope Fractionation. Frontiers in Marine Science

Bach, L. T., A. J. Paul, T. Boxhammer, E. von der Esch, M. Graco, K. G. Schulz, E. Achterberg, P. Aguayo, J. Arístegui, P. Ayón, I. Baños, A. Bernales, A. S. Boegeholz, F. Chavez, G. Chavez, S. M. Chen, K. Doering, A. Filella, M. Fischer, P. Grasse, M. Haunost, J. Hennke, N. Hernández-Hernández, M. Hopwood, M. Igarza, V. Kalter, L. Kittu, P. Kohnert, J. Ledesma, C. Lieberum, S. Lischka, C. Löscher, A. Ludwig, U. Mendoza, J. Meyer, J. Meyer, F. Minutolo, J. Ortiz Cortes, J. Piiparinen, C. Sforna, K. Spilling, S. Sanchez, C. Spisla, M. Sswat, M. Zavala Moreira, U. Riebesell

(2020): Factors controlling plankton community production, export flux, and particulate matter stoichiometry in the coastal upwelling system off Peru. Biogeosciences

Geilert, S., P. Grasse, K. Wallmann, V. Liebetrau, C. D. Menzies


(2020): Serpentine alteration as source of high dissolved silicon and elevated δ30Si values to the marine Si cycle. Nature Communications

Grasse, P., Closset, I., Jones, J. L., Geilert, S., Brzezinski, M. A.

(2020): Controls on Dissolved Silicon Isotopes Along the U.S. GEOTRACES Eastern Pacific Zonal Transect (GP16). Global Biogeochemical Cycles
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