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EM-raying the ocean or climate change impact on tidal electromagnetic signals

Authors
/persons/resource/saynisch

Saynisch,  J.
1.3 Earth System Modelling, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/petereit

Petereit,  J.
1.3 Earth System Modelling, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/irrgang

Irrgang,  Christopher
1.3 Earth System Modelling, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/mthomas

Thomas,  M.
1.3 Earth System Modelling, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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Citation

Saynisch, J., Petereit, J., Irrgang, C., Thomas, M. (2017): EM-raying the ocean or climate change impact on tidal electromagnetic signals, (Geophysical Research Abstracts Vol. 19, EGU2017-6340), General Assembly European Geosciences Union (Vienna 2017).


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_2220914
Abstract
We present an electrometer/magnetometer based method to detect climate induced trends in the oceans. The method utilizes ocean tides. Ocean tides generate electromagnetic signals which are strictly periodic and therefore well separable in terrestrial and spaceborne magnetometer observations. We simulate the change of the tidal electromagnetic signals under different climate scenarios. Frequency, phase, sea surface elevation and path of tidal waves proofed to be very robust under climate change. However, the tidal electromagnetic amplitudes are sensitive to the sea water conductivity of the entire water column. Conductivity itself is a function of the local sea water salinity and temperature, properties that do change considerably in space and time. We compare the impact of global warming and glacial melting on the electromagnetic signals of the major tides. We present the expected amplitude change distributions at sea level and at satellite height.