Extended Data Fig. 7: Spectral Frequency Kernel Density plots for pure E-T-P solution, as well as U1524 and U1361 IBRD records. | Nature Geoscience

Extended Data Fig. 7: Spectral Frequency Kernel Density plots for pure E-T-P solution, as well as U1524 and U1361 IBRD records.

From: Spatially variable response of Antarctica’s ice sheets to orbital forcing during the Pliocene

Extended Data Fig. 7: Spectral Frequency Kernel Density plots for pure E-T-P solution, as well as U1524 and U1361 IBRD records.The alternative text for this image may have been generated using AI.

Frequencies are identified from LOWSPEC analysis59 of the given record plus added noise; they are significant at 85% confidence level (CL). 10000 iterations per AR1 noise coefficient (ρ) are run for each record to test the sensitivity of spectral peaks to the addition of variable “red” noise. Kernel density of frequencies identified as significant is estimated using bandwidth of 5e-4 (cycles/ka) from compiled results all iterations at a specified noise coefficient.

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