The sky is so clear today, isn’t it?
Global Dimming is an interesting phenomenon.
The effects of contrails and black carbon in the air are thought to block the sun rays coming to earth and therefore reduce the greenhouse effect. The last time we saw such a restriction in contrails was just after 9/11 which could have been the reason for a mean increase in land temperature at that time.
Looks like we’re getting another experiment.
There is even some evidence to link the cleaning up of Scandinavia’s air in the mid 80’s to be responsible for changing weather patterns over Africa and causing the Ethiopian drought that brought about Live Aid.
Read more here: https://en.wikipedia.org/wiki/Global_dimming and the
Horizon transcript here: http://www.bbc.co.uk/sn/tvradio/programmes/horizon/dimming_trans.shtml