NOAA admits Stratospheric Aerosol increase..

And of course, they dont know why...

Couldnt possibly be the stratospheric aerosol ( [link to en.wikipedia.org] ) program that HAS been running for many years...

Yes, those grids and Xs in the sky....Chemtrails

[link to www.noaanews.noaa.gov]

NOAA study: Increase in particles high in Earth’s atmosphere has offset some recent climate warming
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In the stratosphere, miles above Earth’s surface, small, airborne particles reflect sunlight back into space, which leads to a cooling influence at the ground. These particles are also called “aerosols," and the new paper explores their recent climate effects -- the reasons behind their increase remain the subject of ongoing research.

“Since the year 2000, stratospheric aerosols have caused a slower rate of climate warming than we would have seen without them,” says John Daniel, a physicist at the NOAA Earth System Research Laboratory (ESRL) in Boulder, Colo. and an author of the new study.