Skip to contents

Estimate temperature with simple linear regression

Source: R/slr.R
temp_slr.Rd

temp_slr() will produce estimates of mean annual temperature and standard error using leaf margin analysis.

Usage

temp_slr(
  data,
  regression = "Peppe2018",
  slope = NULL,
  constant = NULL,
  error = NULL
)

Arguments

data

A data frame that must include the columns "morphotype" and "margin". Can be leaf or species level data.

regression

A string representing one of the following pre-loaded regressions:

  • "Peppe2018" - for global temperature estimates

  • "Peppe2011" - The Americas, Japan, and Oceania

  • "Peppe2011NH" - Peppe 2011 (Northern Hemisphere only)

  • "Miller2006" - North and Central America

  • "WingGreenwood" - East Asia - original leaf margin analysis regression

  • "Wilf1997" - The Americas

slope

Slope, if using a custom regression

constant

Constant, if using a custom regression

error

Standard error, if using a custom regression

Value

A table with MAT estimates for each site

References

  • Miller, I. M., Brandon, M. T., & Hickey, L. J. (2006). Using leaf margin analysis to estimate mid-Cretaceous (Albian) paleolatitude of the Baja BC block. Earth and Planetary Science Letters, 245, 95–114.

  • Peppe, D. J., Baumgartner, A., Flynn, A., & Blonder, B. (2018). Reconstructing paleoclimate and paleoecology using fossil leaves. Methods in paleoecology: Reconstructing Cenozoic terrestrial environments and ecological communities, 289-317.

  • Peppe, D.J., Royer, D.L., Cariglino, B., Oliver, S.Y., Newman, S., Leight, E., Enikolopov, G., Fernandez-Burgos, M., Herrera, F., Adams, J.M., Correa, E., Currano, E.D., Erickson, J.M., Hinojosa, L.F., Hoganson, J.W., Iglesias, A., Jaramillo, C.A., Johnson, K.R., Jordan, G.J., Kraft, N.J.B., Lovelock, E.C., Lusk, C.H., Niinemets, Ü., Peñuelas, J., Rapson, G., Wing, S.L. and Wright, I.J. (2011), Sensitivity of leaf size and shape to climate: global patterns and paleoclimatic applications. New Phytologist, 190: 724-739. https://doi.org/10.1111/j.1469-8137.2010.03615.x

  • Wing, S., & Greenwood, D. R. (1993). Fossils and fossil climate: the case for equable continental interiors in the Eocene. Philosophical Transactions of the Royal Society of London Series B, 341, 243–252.

  • Wilf, P. (1997). When are leaves good thermometers? A new case for leaf margin analysis. Paleobiology, 23, 373–390.

Examples

temp_slr(McAbeeExample, regression = "Peppe2011")
#>        site  n    lower      MAT    upper
#> 1 McAbee H1 31 6.180645 11.18065 16.18065
#> 2 McAbee H2 30 4.360000  9.36000 14.36000