Lo about emissions warming the planet and citing the last 18 months as evidence (the world is on fire etc), nobody states that aviation, transport, heavy industries, etc have ground to almost a halt for the last 18 months due to covid, so I think man made emissions have been cut there, maybe those contrails do have an effect?

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You obviously don't understand that processes in nature take centuries to start and once started keep going for decades. A minor two year interruption is hardly likely to cause more than a ripple.

Nature is not like PC games: you do not get instant reactions. There are HUGE forces and huge heat sinks (eg oceans ) involved: if stopping an ocean liner takes a long time, how long do you thnk it takes a planet 's oceans to cool?? Remember that the oceans weigh approx 1.35 x 10 to the power of 18 metric tonnes, So you need a prolonged temperature change over centuries to make a difference.

"Data from the US National Oceanic and Atmospheric Administration (NOAA) shows that the average global sea surface temperature – the temperature of the upper few metres of the ocean – has increased by approximately 0.13°C per decade over the past 100 years."

A 2 year delay due to Covid is insignificant.

Edited by madf on 10/08/2021 at 15:59