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I forgot to let the audience know that you can type in your questions here. I will read them at the end to Chris...thanks..type them in any time
Why do none of these scenarios warm by more than 2 degrees C by 2100?
These are scenarios where society acts to limit warming.
Got it. Thanks!
How does refrigeration lead to drawdown?
Why educating girls ‘only’ is a drawdown solution? How about ‘boys’ or men?
A bunch of the refrigerant discussion online is related to replacing
OK, that makes sense..
Or reducing HFC emissions, sorry.
I might have missed it but I was wondering how people quantify the impacts of those drawdown measures.
Satellite observations show a decrease in emissions related to the COVID-19 emergency in Europe and China. Can these observations improve climate models with examples of lower emission scenarios?
You didn't miss it. One has to make lots of assumptions..
We make observations of atmospheric GHGs and see if they agree with what we expect emissions to be, go back to our models and inventories, improve, iterate….
Guido, the lifetime of even the shortest-lived greenhouse gas, CH4, is ~13 years, so the concentrations of these gases cannot change on such short time scales.
But the spatial gradients change in response to changing emissions. We can measure changes in emissions on very short time scales, given appropriate data.
That’s what my group does.
Agreed. But that doesn't change the instantaneous radiative forcing.
I was thinking more about optical dimming vs resident gases in the atmosphere. There should be an almost instantaneous changes in fluxes due to clearing in optical dimming.
oh yes, we can see changes in solar radiation, easily.
I mean irradiance on a horizontal surface.