2026-07-04 16:23 UTC
On this hot fourth of July it is worth reminding folks that its not the sun that's causing global warming. Solar output (as measured by satellites) has been flat over the past 50 years when global temperatures have shot up.
Its our emissions of CO2 and other greenhouse gases.
Replies (1)
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@hausfath@fediscience.org 2026-07-04 16:23
This is a pretty generous approach to attributing temperature to solar forcing, as it uses an instantaneous equilibrium response of 0.5 to 1.2C for each w/m^2 increase in forcing (equivalent to a climate sensitivity of 2.0 to 4.7C). Using a proper climate model gives a somewhat smaller response: