Glaciology and Geophysics - Who is Who

Ershadi, Reza

+49-(0)7071-29-73150

Raum 3M40, Geo- u. Umweltzentrum

I have a bachelor's degree in engineering and a master's degree in Applied and Environmental Geoscience (AEG). Geophysics is my favorite branch of science, and most of my geophysical experiences are related to mapping aquifers using Seismic and Electrical tomography. Joining this group as a Ph.D. student is helping me to discover another aspect of the beauty of Geophysics. #ICE, #RADAR, and #ROBOT are the keywords in my Ph.D. Finding a solution to describe ice fabric properties using polarimetric radar (ApRES) alongside with preparing and programming a four-wheeled rover for radar measurements in an Antarctic journey are my Ph.D. goals.

See also: https://www.linkedin.com/in/mreza-ershadi/

Henry, Clara

Collaboration with  Dr. Clemens Schannwell at the Max Planck Institute in Hamburg

I am a PhD student at the University of Tübingen and at the Max Planck Institute for Meteorology in Hamburg. After growing up in the West of Ireland, I moved to St Andrews in Scotland to complete an integrated Master of Mathematics (MMath). There, I developed an interest in the mathematical modelling of physical phenomena, and in particular, geophysical fluid dynamics. Broadly speaking, I am currently interested in ice sheet stability and evolution under external forcing and the ensuing sea level variability (using palaeo reconstruction and extrapolation under anthropogenic forcing). More specifically, my research interests are flow-topography interaction (ice-rise dynamics), rheology and micro-structure of ice (non-Newtonian and viscoelastic mechanics, anisotropy and thermodynamics) and ice-ocean interaction (grounding line dynamics).

Visnjevic, Vjeran

Raum  3M40, Geo- u. Umweltzentrum

+49-(0)7071-29-73150

My research focuses on the interactions between climate and cryosphere. Trained as a geophysicist (Uni Zagreb), during my PhD (Uni Lausanne) I developed and applied a new inverse method to constrain past climates by combining ice flow modelling and geomorphological observations (mapped ice extents) in glaciated mountain ranges, focusing on the Alps and the Pyrenees during the Last Glacial Maximum (LGM). Working on this new approach I developed a strong interest in combining empirical data (geomorphological, proxy) and inverse modelling techniques in order to recover past climate signals. During my PhD I also learned how to write high-performance geocomputing algorithms on graphic cards (GPUs), which allows me to develop and apply new codes and approaches to large scale problems. It also opens opportunities to apply these skills to other fields of geoscience and modelling of Earth’s system.

As a postdoc (Uni Tübingen), together with my team we aim to develop an inverse approach to infer basal melt rates using radar isochrones as observational constraints. For our simulations we use the 3D full Stokes model Elmer/Ice. We hope that this approach will enable us to better constrain the magnitude and history of basal melting, which will give valuable input for ocean circulation and sea level rise modeling. Finally, our results will also guide the collection of new radar data (e.g., profile lines along vs. across-flow) in a way that ambiguities in interpreting the ice-shelf stratigraphy can be minimized.

Koch, Inka

Raum 3M40, Geo- u. Umweltzentrum

+49-(0)7071-29-73150

I am a postdoctoral researcher in the Glaciology and Geophysics Research group and fascinated by recent geophysical development to resolve snow and ice properties in the vertical dimension. My current work focuses on mapping internal ice shelf isochrones from airborne ultra-wideband radar. This observed internal stratigraphy will serve as a temporal archive of atmospheric and oceanic boundary conditions and contribute to the international data collating effort SCAR Ant-Architecture. Employing inverse numerical models, our research group will use the observed internal stratigraphy to derive past ice shelf mass input and output. In addition I am getting our radar equipment (PulseEkko, ApRES) ready for the next field season. I believe in the power of in situ data and am experienced in remote fieldwork with more than a dozen field seasons at high altitude or high latitude.

I have recently returned to the world of Antarctic research after five years of working in the International Centre of Integrated Mountain Development in Nepal where I was engaged in high altitude cryospheric research and development work. The research I am involved in at the University of Tübingen connects to questions that came up during my Ph.D. research on the chemistry and ice structure of marine ice from the Southern McMurdo Ice Shelf in Antarctica.

Drews, Reinhard

Raum 3U37, Geo- und Umweltzentrum

+(49) 7071 – 29 – 73157

I am a geophysicist and currently employed as a junior research group leader of an Emmy Noether Project.  My main scientific focus is in Glaciology, in particular the Earth’s two remaining ice sheets Antarctica and Greenland. I have done much field work in alpine and polar settings mostly using airborne/ground-based radars & GNSS. I am most interested in the ice-sheets’ perimeter where they come in contact with the ocean. At this interface, basal melting occurs and (at least some) people say that this point defines the stability of the entire ice sheet. For understanding past and future sea level variations this is the go-to area at the moment. Other geophysical tools that I use include ground-based radar interferometry, Lidar, and seismics. In many of my studies, I link the geophysical observations to numerical models (e.g. Elmer/Ice). I am increasingly interested to dive into more terrestrial geophysics, e.g., critical zone research and geohazards that link well with the Earth System Dynamics group at the University of Tübingen.

Currently, I am lecturing “Earth Surface Processes” (BA) and “Applied Data Analysis and Modelling for Geoscientists” (MA). Please contact me if you are interested in PhD/MA/BA projects, I think I am a friendly person.

Current MSc / BSc Students:

Michael Erb (MSc, Seismics in the Ammer Valley)

Jason Ching-Sheng Huan (MSc, GIS Analysis of ice-shelf channel morphology)

Ka Hei Chow (Msc, GNSS Analysis for an Antarctic outlet glacier, collab. with KIT Karlsruhe)

Past MSc / BSc Students:

Michael Martin (MSc, Airborne radar data analysis),

Julius Loos (MSc, Numerical Flow Modelling of ice-shelf channel dynamics)

Erik Seiert (MSc, Terrestrial Radar Interferometry of an alpine glacier)

Manuela Lieb (MSc. Finite Difference modeling of the isochronal ice structure)

Steffen Plath (MSc, Forward Modeling of radar data using exploding reflectors)

Delphine Ehmann (BSc, Deriving ice thickness from airborne radar)