diffusion.tf: Calculated diffusion transfer functions

In EarthSystemDiagnostics/proxysnr: Separate Signal and Noise in Climate Proxy Records

Calculated diffusion transfer functions

Description

A dataset containing the calculated diffusion transfer functions for the DML1, DML2 and WAIS data sets from Münch and Laepple (2018) based on numerical simulations. The transfer function describes the average effect diffusion has on the mean of the spectra from N spatially distributed oxygen isotope records.

Usage

diffusion.tf

Format

A list with 3 elements:

dml1:	a list with 2 numeric vectors of length 97:
	freq: frequency axis, in yr^-1
	spec: transfer function value at each frequency
dml2:	a list with 2 numeric vectors of length 497:
	freq: frequency axis, in yr^-1
	spec: transfer function value at each frequency
wais:	a list with 2 numeric vectors of length 100:
	freq: frequency axis, in yr^-1
	spec: transfer function value at each frequency

Source

The transfer functions were obtained using ?DiffusionTF for the site-specific diffusion lengths provided by ?diffusion.length. Isotope records were simulated at semiannual resolution and the transfer functions interpolated in frequency space to annual resolution. See also the respective package vignette: vignette(topic = "calculate-transfer-functions", package = "proxysnr").

References

Münch, T. and Laepple, T.: What climate signal is contained in decadal- to centennial-scale isotope variations from Antarctic ice cores? Clim. Past, 14, 2053–2070, https://doi.org/10.5194/cp-14-2053-2018, 2018.

See Also

DiffusionTF
vignette(topic = "calculate-transfer-functions", package = "proxysnr")

EarthSystemDiagnostics/proxysnr documentation built on April 27, 2024, 8:24 p.m.