Submarine permafrost layers represent the seaward extension of the arctic permafrost layers at the continental margins in Northern America and Eurasia. Given their nature, the geometry of the submarine part of the permafrost layers is a very sensitive indicator for climate change. Within the MOSES Initiative (Modular Observation Solutions for Earth Systems) we intend to develop a passive seismic method to determine the thickness of the unfrozen layer above the ice-bonded permafrost (IBP) using a portable ocean bottom seismic (OBS) instrument. By recording ocean bottom seismic noise at a larger number of locations and analysing the data by the H/V method we will be able to map the spatial extend and temporal changes of the IBP.
Methods & Equipment