temp {paleobuddy}

Cenozoic temperature data

Description

Temperature data during the Cenozoic. Modified from the InfTemp data set in RPANDA, originally inferred from delta O18 measurements. Inverted so lower times represent time since first measurement, to be in line with the past-to-present convention of most time-dependent functions in paleobuddy.

Usage

data(temp)

Format

A data frame with 17632 rows and 2 variables:

t

A numeric vector representing time since the beginning of the data frame age, approximately 67 million years ago, in million years. We set this from past to present as opposed to present to past since birth-death functions in paleobuddy consider time going in the former direction. Hence t = 0 represents the time point at 67.5173mya, while t = 67.5173 represents the present.

temperature

A numeric vector representing temperature in degrees celsius corresponding to time t. Note there might be more than one temperature for each time t given the resolution of the data set.

Source

https://github.com/hmorlon/PANDA

References

Morlon H. et al (2016) RPANDA: an R package for macroevolutionary analyses on phylogenetic trees. Methods in Ecology and Evolution 7: 589-597.

Epstein, S. et al (1953) Revised carbonate-water isotopic temperature scale Geol. Soc. Am. Bull. 64: 1315-1326.

Zachos, J.C. et al (2008) An early Cenozoic perspective on greenhouse warming and carbon-cycle dynamics Nature 451: 279-283.

Condamine, F.L. et al (2013) Macroevolutionary perspectives to environmental change Eco Lett. 16: 72-85.