Matches in SemOpenAlex for { <https://semopenalex.org/work/W4322005433> ?p ?o ?g. }
Showing items 1 to 64 of
64
with 100 items per page.
- W4322005433 abstract "Models and paleointensity data continue to consistently point to the Ediacaran Period as the most likely time for the onset of inner core nucleation (ICN). The geodynamo models of Driscoll (2016) and Driscoll and Davies (2022) predict a weak field state, where core kinetic energy exceeds magnetic energy, prior to ICN. The paleomagnetic record of the Ediacaran Period shows a hyper-reversal frequency and unusually high secular variation. But the most telling characteristic of the Ediacaran magnetic field that suggests the dynamo approached the weak field state is its time-averaged ultralow paleointensity, more than 10 times weaker than today (Bono et al., 2019). The field subsequently regained strength in the early Cambrian (Zhou et al., 2022), consistent with Ediacaran ICN. Here, we investigate the possibility that the magnetic field may have ceased completely for some part of the Ediacaran Period. We report new field strength values from whole rocks that are less than 1-2 microTesla. These values are amongst the lowest terrestrial fields ever recorded, heightening the possibility of environmental effects due to the weakened magnetosphere that may have in turn influenced biotic evolution. But even these ultralow field values may overestimate the true ambient field strength because of subsequent thermal viscous magnetic overprints carried by nonideal magnetic carriers in whole rocks. We will discuss our efforts to use single crystal paleointensity methods to isolate ideal magnetic carriers to resolve this question." @default.
- W4322005433 created "2023-02-26" @default.
- W4322005433 creator A5001846159 @default.
- W4322005433 creator A5062447455 @default.
- W4322005433 creator A5068938126 @default.
- W4322005433 creator A5070063998 @default.
- W4322005433 creator A5083883713 @default.
- W4322005433 date "2023-05-15" @default.
- W4322005433 modified "2023-09-30" @default.
- W4322005433 title "Did the dynamo cease during the Ediacaran Period prior to inner core nucleation?" @default.
- W4322005433 doi "https://doi.org/10.5194/egusphere-egu23-7723" @default.
- W4322005433 hasPublicationYear "2023" @default.
- W4322005433 type Work @default.
- W4322005433 citedByCount "0" @default.
- W4322005433 crossrefType "posted-content" @default.
- W4322005433 hasAuthorship W4322005433A5001846159 @default.
- W4322005433 hasAuthorship W4322005433A5062447455 @default.
- W4322005433 hasAuthorship W4322005433A5068938126 @default.
- W4322005433 hasAuthorship W4322005433A5070063998 @default.
- W4322005433 hasAuthorship W4322005433A5083883713 @default.
- W4322005433 hasConcept C105094362 @default.
- W4322005433 hasConcept C115260700 @default.
- W4322005433 hasConcept C121332964 @default.
- W4322005433 hasConcept C127313418 @default.
- W4322005433 hasConcept C135757623 @default.
- W4322005433 hasConcept C151730666 @default.
- W4322005433 hasConcept C187309904 @default.
- W4322005433 hasConcept C189479680 @default.
- W4322005433 hasConcept C24890656 @default.
- W4322005433 hasConcept C2781291010 @default.
- W4322005433 hasConcept C61048295 @default.
- W4322005433 hasConcept C62520636 @default.
- W4322005433 hasConcept C8058405 @default.
- W4322005433 hasConcept C97355855 @default.
- W4322005433 hasConceptScore W4322005433C105094362 @default.
- W4322005433 hasConceptScore W4322005433C115260700 @default.
- W4322005433 hasConceptScore W4322005433C121332964 @default.
- W4322005433 hasConceptScore W4322005433C127313418 @default.
- W4322005433 hasConceptScore W4322005433C135757623 @default.
- W4322005433 hasConceptScore W4322005433C151730666 @default.
- W4322005433 hasConceptScore W4322005433C187309904 @default.
- W4322005433 hasConceptScore W4322005433C189479680 @default.
- W4322005433 hasConceptScore W4322005433C24890656 @default.
- W4322005433 hasConceptScore W4322005433C2781291010 @default.
- W4322005433 hasConceptScore W4322005433C61048295 @default.
- W4322005433 hasConceptScore W4322005433C62520636 @default.
- W4322005433 hasConceptScore W4322005433C8058405 @default.
- W4322005433 hasConceptScore W4322005433C97355855 @default.
- W4322005433 hasLocation W43220054331 @default.
- W4322005433 hasOpenAccess W4322005433 @default.
- W4322005433 hasPrimaryLocation W43220054331 @default.
- W4322005433 hasRelatedWork W1967621528 @default.
- W4322005433 hasRelatedWork W1986172769 @default.
- W4322005433 hasRelatedWork W1989967035 @default.
- W4322005433 hasRelatedWork W2045772716 @default.
- W4322005433 hasRelatedWork W2046296432 @default.
- W4322005433 hasRelatedWork W2056502359 @default.
- W4322005433 hasRelatedWork W2058471275 @default.
- W4322005433 hasRelatedWork W2568759638 @default.
- W4322005433 hasRelatedWork W2888414167 @default.
- W4322005433 hasRelatedWork W3082084006 @default.
- W4322005433 isParatext "false" @default.
- W4322005433 isRetracted "false" @default.
- W4322005433 workType "article" @default.