Scientists detect a human fingerprint in the atmosphere's seasonal cycles | John Abraham

In the troposphere, scientists detected a human-caused signal in the seasonal cycle

We know that humans are causing Earth’s climate to change. It used to be that “climate change” mostly referred to increasing temperatures near the Earth’s surface, but increasingly, climate change has come to mean so much more. It means warming oceans, melting ice, changing weather patterns, increased storms, and warming in other places.

A recent study has just been published that finds ‘fingerprints’ of human-caused warming someplace most of us don’t think about – in the higher atmosphere. Not only that, but these scientists have found changes to the seasonal climate – how much the temperature varies from winter to summer to winter – and the changes they found matched expectations.

For tropospheric temperature, a human-caused signal is now evident in the seasonal cycle itself.