Ms Andrea Rochner
PhD student
ar654@exeter.ac.uk
The Farmhouse FO4 8
The Farmhouse, University of Exeter, Penryn Campus, Cornwall, TR10 9FE, UK
Overview
My name is Andrea Rochner and I am currently a PhD candidate in the Physical Geography department, expecting to finish in 2023. My thesis investigates the CO2 exchange between atmosphere and ocean with a focus on the Southern Ocean using a coupled physical-biogeochemical ocean model as well as biogeochemical data assimilation.
Generally I am interested in the role of the ocean within the climate system, interactions between ocean physics and biogeochemistry, and large-scale dynamics. My favourite oceanographic feature are water masses.
For more information and to get in touch, see:
https://andrearochner.github.io/
https://twitter.com/AndreaROcean
Qualifications
M.Sc. Physical Oceanography, Universität Hamburg (2015 - 2018)
B.Sc. Geophysics/Oceanography, Universität Hamburg (2012 - 2015)
Research
Research interests
In my project, I investigate the air-sea CO2 flux in the Southern Ocean in the coupled physical-biogeochemical ocean model NEMO-MEDUSA-CICE, which also forms the ocean component of the CMIP6 model UK Earth System Model (UKESM1). Compared to the UKESM1, the ocean model simulates stronger uptake and an opposite seasonal cycle of CO2 flux. I investigate the role of atmospheric forcing and model biases on the magnitude and variability of the CO2 flux.
In the second part of the thesis, I attempt to improve the simulation of the fluxes by assimilating biogeochemical observations using NEMOVAR (a 3D-Var data assimilation scheme). I test the influence of assimilating various remote sensing and in situ observations on the CO2 flux and biogeochemistry.
Teaching
Guest lectures- 2021 & 2022: Southern Ocean biogeochemistry and air-sea CO2 flux in the module Antarctica: Science from a Frozen Continent
- 2020: Climate Change: causes and effects in the module Living with Environmental Change (2020)
Postgraduate Teaching Assistant
- 2021 & 2022 Coastal Systems in a Changing World from the BSc Geography – facilitating computer practicals and creation of video abstracts
- 2021 Global Challenges from the MSc Global Systems Solutions – marking of short videos about global sustainability challenges