Team

Dr. Judith Hauck

Team leader
I studied marine sciences and have worked with global ocean biogeochemistry models as well as observations in the past. I am interested in understanding ocean carbon cycling and its interactions with climate change and variability - from biological to physical processes and from preindustrial times into the future. Thus, in my group, we are working to improve process representation in the biogeochemistry and ecosystem model REcoM and simulate the recent and future evolution of the ocean carbon cycle. I also coordinate the ocean carbon sink estimate for the Global Carbon Budget.

 

 

Dr. Özgür Gürses

Scientific programmer
I studied civil and computational mechanics in Ankara and Munich. In the past, I investigated the circulation dynamics of the Turkish Straits System and ice shelf-ocean interactions in the Southern Ocean. Currently I am developing the coupled marine biogeochemistry model FESOM-REcoM, which is also part of AWI’s Earth System Model (AWI-ESM). I also contribute to the Global Carbon Budget.

 

 

Dr. Laurent Oziel

Postdoc
I monitor physical changes in the Arctic environment (Ocean currents,  water masses, mesoscale features, mixing, sea ice…) and study their impacts on phytoplankton dynamics (biomass, primary productivity, phenology, spatial distribution, composition, trends …) and biogeochemical cycles (carbon and nutrients). I used a collection of tools from in situ data (autonomous or traditional platforms) to remote sensing (ocean color, altimetry, infrared). But I am currently focusing more on BGC modelling in the framework of the H2020-Project COMFORT and the BMBF nuArctic projects. nuArctic investigates nutrient remineralization combining modelling experiments with observations from the MOSAiC expedition.

Dr. Christopher Danek

Postdoc
I studied meteorology and I am interested in Earth System Models (ESMs) with a focus on ocean dynamics and their influence on biogeochemical processes. Currently, I investigate the interannual variability of the ocean CO2 sink in our warming world. I want to improve Earth System Models and enhance our understanding of climate feedbacks we will face in the near future.

 

 

Dr. Miriam Seifert

Postdoc
With a Master’s degree in marine biology and several field trips to the Arctic, I entered the field of biogeochemical modelling at the start of my PhD project. Therein I investigated CO2 dependencies of and multiple stressor effects on phytoplankton growth rates in published laboratory data, and developed model functions to represent these effects in REcoM. In my current work I aim to further improve the description of biological processes in REcoM for a better representation of the biological carbon pump. This work is supported by a regular scientific exchange with the phytoplankton ecophysiologists of the section. Furthermore, I’m part of the EU Horizon 2020 project OceanNETs, investigating the efficiency of ocean-based negative emission technologies in AWI’s Earth System Model AWI-ESM. 

 

Frauke Bunsen

PhD Student
I did my master’s in Climate Physics. Currently, I implement data assimilation into the ocean physics and biogeochemistry model FESOM-REcoM, working also in the AWI’s Data Assimilation group. I’m interested in using data assimilation to study the global air-sea flux of CO2.

 

 

Tanvi Nagwekar

PhD Student
I have a bachelor with Physics major and a master degree in Atmospheric Sciences. For my master thesis I examined the decadal variability of the carbon cycle in the Indian Ocean region. For the Ph.D. I am doing Ocean Biogeochemical Modeling for Ocean Alkalinity Enhancement in deep and bottom water formation regions. I study the efficiency of carbon dioxide sequestration in the ocean and the side effects of Alkalinity Enhancement on the ocean ecosystem.

Hannah Haines

PhD Student
I am a PhD student studying the effect of temperature on phytoplankton growth and incorporating it into biogeochemical models and investigating the difference between phytoplankton functional groups vis à vis temperature-growth relationships.

 

Simone Le Chevère

PhD Student
After my studies in physics and chemistry, I did a master's degree in physical and biogeochemical oceanography on carbon fluxes in the Southern Ocean. Now I am working on a new dataset on evaluation metrics for the carbon fluxes between mixed surface layer and deep ocean based on BGC-Argo floats to evaluate the FESOM-REcoM model and improve its estimation of the ocean carbon sink.

 

Dr. Sreeush Mohanan

Postdoc
My research focuses on understanding the global oceanic carbon cycle and associated biogeochemical interactions at different time scales. My past work includes carbon observing system simulation experiments (OSSEs) in the Indian Ocean, the role of plasticity of nutrient uptake in phytoplankton for future net primary production, and time of emergence of anthropogenically induced trends in dissolved organic matter in Earth system model simulations.
I am currently developing a benchmarking scheme for ocean carbon cycle models to assess model performance and uncertainties in estimating global ocean carbon uptake to contribute to the global carbon budget.