Ray Pierrehumbert thought this notion sounded interesting, a while
back at RC; at the time all I'd seen and all he'd seen was an IEEE
abstract.  I mentioned it at RC quite a while ago, and haven't seen
anything more about it.

The IEEE article seemed to be thinking about big infrared lasers (yes,
I think they'd have to be bicycle/hydro/solar/wind powered to make a
net improvement -- you don't want to generate any net excess heat to
power such a device!)

http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1392156

Ray's inline replies in these comments:
http://www.realclimate.org/?comments_popup=307#comment-14306
http://www.realclimate.org/?comments_popup=307#comment-14322

At the rate at which light-emitting diodes are improving, it might
soon be possible to make rooftops not just white, but actively
narrowband emitters, to lose heat in one of the infrared windows.

I was hoping some astronomer would start looking in those bands --
maybe it would be a way to locate life elsewhere.  Has anyone reported
an exoplanet with very narrowband IR signature?

Maybe we could be the first ...

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