Expected <a href="https://en.wikipedia.org/wiki/Earth" class="extiw" title="en:Earth">Earth</a> energy imbalance for three choices of <a href="https://en.wikipedia.org/wiki/aerosol" class="extiw" title="en:aerosol">aerosol</a> <a href="https://en.wikipedia.org/wiki/Radiative_forcing" class="extiw" title="w:Radiative forcing">climate forcing</a>. Measured imbalance, close to 0.6 W/m2, implies that <a href="https://en.wikipedia.org/wiki/aerosol" class="extiw" title="w:aerosol">aerosol</a> forcing is close to -1.6 W/m2. (Credit: NASA/<a href="https://en.wikipedia.org/wiki/GISS" class="extiw" title="en:GISS">GISS</a>)
<a href="https://en.wikipedia.org/wiki/NASA" class="extiw" title="en:NASA">NASA</a>/<a href="https://en.wikipedia.org/wiki/GISS" class="extiw" title="en:GISS">GISS</a>
<a rel="nofollow" class="external free" href="http://www.giss.nasa.gov/research/briefs/hansen_16/">http://www.giss.nasa.gov/research/briefs/hansen_16/</a>