A clumped isotope temperature calibration in reversed form, where the calibration $$y = a \times 10^6 / T^2 + b$$ with \(T\) in Kelvin, is expressed as a function of \(T_C\)(in degrees Celsius): $$T_C = \sqrt{(a \times 10^6) / (y - b)} - 273.15$$

```
revcal(
D47,
slope = 0.0449,
intercept = 0.167,
slpcnf = 0.001,
intcnf = 0.01,
ignorecnf = FALSE
)
```

- D47
The \(\Delta_{47}\) value.

- slope
The slope of the regression.

- intercept
The intercept of the regression.

- slpcnf
The confidence of the slope of the regression.

- intcnf
The confidence of the intercept of the regression.

- ignorecnf
Whether or not to ignore the confidence of the temperature calibration.

A tibble with input \(\Delta_{47}\) and estimated Tc value with lower and upper bounds.

Defaults to Bonifacie et al. 2017 $$\Delta_47 = (0.0449 \pm 0.001 \times 10^6) / T^2 + (0.167 \pm 0.01)$$

tempcal()