A Holocene paleosecular variation record from the northwestern Ross Sea, Antarctica

Abstract:    This dataset contains Holocene paleomagnetic data from a sediment core (RS15-GC57) collected from Robertson Bay, northwestern Ross Sea, Antarctica (71°32.27′S, 170°03.54′E; 344 m water depth), presented in Truax et al. (2025). Further details on the age model and Holocene depositional environment in Robertson Bay are available in Truax et al. (2024). 

Supplement to:    Truax, O. J., Nelson, F., Riesselman, C. R., Ohneiser, C., Lee, J. I., Yoo, K.-C., Dagg, B., & Wilson, G. (2024). A Holocene paleosecular variation record from the northwestern Ross Sea, Antarctica. (2025). Geochemistry, Geophysics, Geosystems. https://doi.org/10.1029/2024GC011912

Related to:    Truax, O. J., Riesselman, C. R., Wilson, G. S., Stevens, C. L., Parker, R. L., Lee, J. I., McKay, R. M., Rosenheim, B. E., Ginnane, C. E., Turnbull, J. C., Moon, H. S., Lee, M. K., Dagg, B., & Yoo, K.-C. (2024). Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity. Quaternary Science Reviews, 332, 108635. https://doi.org/10.1016/j.quascirev.2024.108635  

The following tabular data presents paleomagnetic measurements at different depth intervals from core RS15-GC57. Columns are defined as follows:  

- Depth (m): Core depth in meters  - 30mT NRM (A/m): Natural remanent magnetization at 30mT demagnetization  - sARM (A/m): Saturation anhysteretic remanent magnetization  - kARM (A/m × 10⁻³): Anhysteretic remanent magnetization susceptibility  - Magnetic susceptibility (SI × 10⁻⁵): Bulk magnetic susceptibility (Truax et al., 2024)- 30mT NRM/kARM: Relative paleointensity calculated as the ratio of NRM to kARM  - kARM/k: Ratio of kARM to magnetic susceptibility  - MDF demagnetization (mT): Median destructive field of demagnetization  - Age (cal yr BP): Calibrated radiocarbon age in years before present (Truax et al., 2024)- PCA dec. (deg): ChRM Fisher mean declination - PCA inc. (deg): ChRM inclination  - PCA MAD3: Maximum angular deviation for PCA  - UPMag Slope RPI: Relative paleointensity calculated via the UPmag slope fit method (Xuan and Channell, 2009)  - UPMag R value: R value from the UPMag analysis