Paulo, Bullfrog, Matt - thank you for your comments.
Paulo - the 'red' is first killed when the image is converted from ProPhoto space to sRGB, and then again by the gamut-limited monitors. I see that on the iPad it is rendered orange-y, and it is not much better on the MacBook Air screen either. I haven't yet checked the Retina MacBook Pro.
Matt - it took me several years to see Iceland in a different light (pardon the pun). Confronted with those wild landscapes, the temptation to molest the contrast and saturation sliders is high.