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Radiation reflected from an object that is hotter than the source of the radiation will shorten the reflected waves of radiation, thereby increasing their speed, thermal capacities (atmospheric resistance), ionic effect and refractive index.

Radiation reflected from an object that is cooler than the source radiation will lengthen the reflected waves of radiation, thereby decreasing their speed, thermal capacities (atmospheric resistance), ionic effect and refractive index.

What would be most wise, is for the scientific community to begin researching just what is happening within this planet, where it is going (they obviously do not know), and just what may be the implications of activities such as essentially attempting to place a concrete and asphalt coating on this reflective object, and the many other activities not being investigated in this arena.

While Arctic ice core samples can determine atmospheric levels of dust particles and other organically atomic particles, it cannot re-create the radiation levels, nor their possible thermal effects. A cold planet could still certainly manifest an atmoshpere that would appear to mimick a warm one in core ice samples.

A colder planet could very well have a marked effect on the levels of Solar Radiation in Earth's atmoshpere, and in effect nearly all other levels of gasses and organics. The presence of increased levels of Green House Gasses do not automatically imply that this planet is warming. What is imperative is understanding the true cyclic nature of this planet within the Universe, and our compliance with its inherently sustainable nature.