By several meteorological measures, the airmass associated with this storm is pretty extraordinary: the amount of
atmospheric water vapor (
precipitable water) expected to be present near San Francisco on Saturday morning may be close to the all - time record value for any time of year.
Strangely, as Solomon et al. clearly are not aware that the sun does not shine at night, whereas the opacity (OPQ, a term unknown to the IPCC) of the sky becomes relevant, if we replace AVGLO by OPQ, then we have these results, that OPQ has a larger role than [CO2], but without being statistically significant, whereas the main player as before is the ESRL's «
precipitable water», i.e.,
atmospheric water vapor, denoted here as [H2O], hugely statistically significant (t stat = 3.39, well above the benchmark 2.0).