The dynamics of the Earth’s inner core: Convection and differential rotation ...
<!--!introduction!--> Earth’s inner core structure, evolution and current thermal state remain enigmatic. Recent papers on its differential rotation relative to the mantle spurred much interest. However, significant matters arise from analysing the travel times of the subset of repetitive eart...
| Main Authors: | , , , , , , , |
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| Format: | Conference Object |
| Language: | English |
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GFZ German Research Centre for Geosciences
2023
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.57757/iugg23-3132 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020574 |
| Summary: | <!--!introduction!--> Earth’s inner core structure, evolution and current thermal state remain enigmatic. Recent papers on its differential rotation relative to the mantle spurred much interest. However, significant matters arise from analysing the travel times of the subset of repetitive earthquakes from the South Sandwich Islands region to Alaska—the dataset recently used to infer the 70-year differential rotation cycle. 17 of 24 doublets were discarded from the previous dataset. This selective approach is at odds with the principle that all data (already deemed legitimate doublets in earlier studies) are useful in small data sets to inform the solution. Another problematic approach has been to use a fixed parameterisation—a highly subjective choice. We revisit this problem using Bayesian transdimensional inference. Alternative models of the differential rotation also explain the observed data, but, like all proposed models (Bayesian or Frequentist), they are not required by the data. Several ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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