Amazing stuff!
How much does actually what goes on underneath the Earth surface influence climate? How much varies over time and/or space? I suspect it is much more than what is currently known.
Keep in mind: Global warming is a hoax and climate change is a religion! It is being used as a pretext by Big Government and the elite to interfere with our lives. It is among the greatest scams and scandals of at least the last 30 years!
"... Movement of the inner core has been debated by the scientific community for two decades, with some research indicating that the inner core rotates faster than the planet’s surface. The new USC study provides unambiguous evidence that the inner core began to decrease its speed around 2010, moving slower than the Earth’s surface. ...
The inner core is considered to be reversing and backtracking relative to the planet’s surface due to moving slightly slower instead of faster than the Earth’s mantle for the first time in approximately 40 years. Relative to its speed in previous decades, the inner core is slowing down.
The inner core is a solid iron-nickel sphere surrounded by the liquid iron-nickel outer core. Roughly the size of the moon, the inner core sits more than 3,000 miles under our feet ...
In this study, the researchers compiled and analyzed seismic data recorded around the South Sandwich Islands from 121 repeating earthquakes that occurred between 1991 and 2023. They have also utilized data from twin Soviet nuclear tests between 1971 and 1974, as well as repeated French and American nuclear tests from other studies of the inner core. ...
The implications of this change in the inner core’s movement for Earth’s surface [and climate?] can only be speculated. ..."
From the abstract:
"The inner core has been inferred to change its rotation rate or shape over years to decades since the discovery of temporal variability in seismic waves from repeating earthquakes that travelled through the inner core.
Recent work confirmed that the inner core rotated faster and then slower than the rest of Earth in the last few decades;
this work analysed inner-core-traversing (PKIKP) seismic waves recorded by the Eielson (ILAR) and Yellowknife (YKA) arrays in northern North America from 121 repeating earthquake pairs between 1991 and 2023 in the South Sandwich Islands. Here we extend this set of repeating earthquakes and compare pairs at times when the inner core re-occupied the same position, revealing non-rotational changes at YKA but not ILAR between 2004 and 2008.
We propose that these changes originate in the shallow inner core, and so affect the inner-core-grazing YKA ray paths more than the deeper-bottoming ray paths to ILAR.
We thus resolve the long-standing debate on whether temporal variability in PKIKP waves results from rotation or more local action near the inner-core boundary: it is tentatively both.
The changes near the inner-core boundary most likely result from viscous deformation driven by coupling between boundary topography and mantle density anomalies or traction on the inner core from outer-core convection."
USC study confirms the rotation of Earth’s inner core has slowed (original news release) "A new study provides clear evidence that the inner core began to decrease its speed around 2010."
The Earth moves far under our feet: New study shows Earth’s inner core oscillates (published 2022; USC Dornsife scientists’ analysis of seismic data identifies a six-year cycle of super- and sub-rotation that affects the length of a day.)
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