Heat Flux and climate?

Question

what are some reason that the present day climate may have a heat flux than that of a glacial climate in the past

Answer 1

longwave radiation is greater now, not from input (from the sun) but its actually got less output (reflection and loss back to space).  In other words during the glacial time sunlight hit the earth and bounced back almost completely because the ice has very high albedo and reflects sunlight well.  When sunlight is reflected its wavelength does not change so it is not considered longwave.....

In the present time there is less ice so more of the sunlight is reaching the earth.  This means that more is being absorbed and changed into longwave (infrared).  On top of that we have a heightened greenhouse effect whcih is trapping in this infrared longwave radiation.  This is leading to the rising temperatures and global climate change...

Answer 2

glaciers reflect longer waves that can pass back out through the atmosphere more readily than unglaciated terrain.

Glaciers are white because of this reflection.  The sun's energy isn't converted into longer wave "heat" that gets captured or internally reflected by the atmosphere.