Supplement 1. Model-fitting code in R.

<h2>File List</h2><div> <p><a href="model_fitting_code.txt">model_fitting_code.txt</a> (MD5: c09ca8dc9c50bb86a7f5356bdba5af03) </p> </div><h2>Description</h2><div> <p>Within this supplement, we provide the essential code for model fitting and calculation of climatic sensitivities. We assume that the user has created vectors of data in their workspace as discussed in the commenting of the code below. We did not include code associated with graphing as we used standard functions in the R programming environment (see www.r-project.org/‎ for further information).</p> </div>