Magnetic tidal signals in the southern Indian Ocean ...
<!--!introduction!--> We analyze recordings of four geomagnetic observatories located in the French sub-antarctic and antarctic territories: Amsterdam Island (AMS), Crozet (CZT), Kerguelen (PAF), Durmont d'Urville (DRV). These recordings cover several decades of the geomagnetic field vari...
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| Format: | Conference Object |
| Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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| Online Access: | https://dx.doi.org/10.57757/iugg23-3935 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019898 |
| Summary: | <!--!introduction!--> We analyze recordings of four geomagnetic observatories located in the French sub-antarctic and antarctic territories: Amsterdam Island (AMS), Crozet (CZT), Kerguelen (PAF), Durmont d'Urville (DRV). These recordings cover several decades of the geomagnetic field variation sampled every minute. We report results of a classical spectral analysis, where we estimate the spectral content of these series. Unlike previous studies, we attempt to identify the inter-annual variability of magnetic signals generated by Ocean tides, therefore we analyze monthly sets of the magnetic field recordings. We identify different tidal constituents, i.e. diurnal, semi-diurnal and short-periodic shallow water tides. Almost all show a long-term variability (seasonality) in their strength, particularly the shallow-water MK3 tide at Amsterdam Island (AMS), but also diurnal and semi-diurnal tides such as O1, K1 and M2. Causes of the long-term variability of shallow water tides and the diurnal and ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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