Uncertainty In Estimating Solar Forcing Across The Arctic Is 100-350x Larger Than CO2’s Alleged Climate Impact

For example, a cloudy day in winter may deliver 20-30 W/m² of cloud radiative forcing (CRF), warming the Arctic surface by 6-9°C. Systematic errors (biases) in estimating downwelling shortwave (SW) can deviate by 90-160 W/m² from one dataset to the next. Overall, datasets disagree by 20-70 W/m² when estimating downwelling SW across the Arctic, and thus our measurements are “insufficient to meet the needs of radiation energy budget estimation.” The increase in atmospheric CO2 is alleged to be the driver of modern Arctic warming. The 20-70 W/m² uncertainty in estimating the Arctic’s surface solar radiation is 100 to 350 times larger than 10 years of accumulated clear-sky-only CO2 impacts (0.2 W/m² per Feldman et al., 2015).