1. OceanMag II EM-Raying the Ocean
Jan Saynisch, Johannes Petereit, Christopher Irrgang
GFZ German Research Centre for Geosciences, Potsdam
DFG SPP 1788 Dynamic Earth Colloquium
June 14-16, 2017
Bremen

2. Using Swarm observations of oceanic electromagnetic induction to improve global ocean circulation models
-10 -6 -2 2 6 10
[nT]
Ocean circulation induced magnetic field at sea surface
-10 -6 -2 2 6 10
[nT]
Tidal (M2) induced magnetic field at sea surface

3. Using Swarm observations of oceanic electromagnetic induction to improve global ocean circulation models
-10 -6 -2 2 6 10
[nT]
Ocean circulation induced magnetic field at sea surface
Our data assimilation twin experiment shows (Irrgang et al., 2017, accepted):
Ocean velocities can be corrected
Ocean heat and salinity are not corrected
Not yet extracted from Swarm observations
-10 -6 -2 2 6 10
[nT]
Tidal (M2) induced magnetic field at sea surface
Tidal magnetic field is sensitive towards changes in ocean heat and salinity (Saynisch et al., 2016, 2017)
Recently extracted from Swarm observations (Sabaka et al., 2017)
Utilize tidal magnetic observations to improve oceanic heat and salinity transports in ocean models

4. References Cover picture
Irrgang, C., Saynisch, J., Thomas, M. (2017). Utilizing electromagnetic induction to constrain an ocean general circulation model: A data assimilation twin experiment. Accepted in Journal of
Advances in Modeling Earth Systems.
Sabaka, T. J., Tyler, R. H., & Olsen, N. (2016). Extracting Ocean-Generated Tidal Magnetic Signals
From Swarm Data through Satellite Gradiometry. Geophys. Res. Lett.
Saynisch, J., Petereit, J., Irrgang, C., Kuvshinov, A., & Thomas, M. (2016). Impact of climate variability
on the tidal oceanic magnetic signal-A model-based sensitivity study. J. Geophys. Res. Oceans,
121(8), 5931–
Saynisch, J., Petereit, J., Irrgang, C., & Thomas, M. (2017). Impact of oceanic warming on
electromagnetic oceanic tidal signals: A CMIP5 climate model-based sensitivity study.
Geophys. Res. Lett., 1–7.