On 29/11/2019 13:16, Graham Easterling wrote:

Thin high cirrus and higher water vapour content of a warmer atmosphere
still let most of the sunlight through but make it harder for thermal
long wave IR to escape. Net warming potentially quite strong.

So contrails could be significant here?

You might find this of interest:

Oceanic Cloud Decrease since 1987 Explains 1/3 of Ocean Heating
October 3rd, 2013 by Roy W. Spencer, Ph. D.

http://www.drroyspencer.com/2013/10/...ocean-heating/

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Spike