Not exact matches
Further improvement on the accuracy of the observations of the
water ice
absorption depth is needed to constrain the disk
models.
We compared the observed depth of the ice
absorption feature with the disk
model based on \ cite -LCB- Oka2012 -RCB- including
water ice photodesorption effect by stellar UV photons.
Direct comparison of the radiances predicted by the
model to those observed by AIRS in the thermal spectral regions dominated by
water vapor
absorption provides a means of assessing the simulation of
water vapor in the climate
model at the high level of detail provided by spectral measurements.
If, for instance, CO2 concentrations are doubled, then the
absorption would increase by 4 W / m2, but once the
water vapor and clouds react, the
absorption increases by almost 20 W / m2 — demonstrating that (in the GISS climate
model, at least) the «feedbacks» are amplifying the effects of the initial radiative forcing from CO2 alone.
Yet
models of atmospheric
absorption that only take into account the
water molecule's well - known rotational and vibration - rotational transitions don't match up with measurements of the atmosphere's
absorption spectrum [1]....
The 0.9 degr.C for 2xCO2 is from the Modtran program, carefully composed from laboratory measurements, where line by line
absorption characteristics were measured and implemented for different air pressures (heights),
water, CO2 and CH4 levels, for different parts of the globe and with or without clouds, rain,... That is a basic «
model», without any real life feedbacks (except
water vapor, which may be included in different ways).
«how it is supposed to work» = according to non-real-world theoretical
models that say CO2 molecules that are spaced together 1/20, 000 ths more closely today than they were in 1990 function just like a blanket draped over the ocean
waters, and this CO2 blanket determines the net heat changes in the depths of the ocean more so than variations in direct shortwave radiation
absorption does.
The issue is that the excess
absorption, through the focus on CO2 and the
modeling assumption of a positive feedback by
water, is being
modeled without a clear theoretical explanation of how exactly and by what the excess
absorption is being absorbed.