On Fri, Oct 18, 2013 at 6:16 AM, Michael Marsh <sw...@blarg.net> wrote: > > If you want a measure of exposure, i. e., heat, I suggest using the > "heatload" transformation suggested by McCune and Grace (2002). Their > assumption is that mid-afternoon, when the sun is in the southwest, is > usually the warmest time of day. The formula at the end of Chapter 3 follows: > > heat load index=(1-cos(degrees-45))/2 > > McCune, Bruce and James B. Grace. 2002. Analysis of ecological communities. > MJM Software Design. Gleneden Beach, Oregon. USA
Thanks for the interesting discussion! I'd like to add that although I don't have the book, I found the radiation measures presented in the following paper: McCune, B. and D. Keon. 2002. Equations for potential annual direct incident radiation and heat load. Journal of Vegetation Science 13:603–606. Cheers, Ivailo -- UBUNTU: a person is a person through other persons. _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
