Essentially, every timestep the model calculates the forcing from CO2 and reduces incoming solar radiation to offset that, taking
changing planetary albedo into account.
Arguing against greening because it might marginally
change planetary albedo is madness — madness I say.
Not exact matches
Whilst several methods for counteracting climate
change with geoengineering are considered feasible, injecting sulfates or other fine aerosols into the stratosphere, thereby increasing
planetary albedo, is a leading contender.
Since it reflects the capacity of the climate system to absorb heat, it may be influenced by the
planetary albedo (sea - ice and snow) and ice - caps, which respond to temperature
changes.
These findings are remarkable insofar as they indicate that anthropogenic perturbations of the
planetary albedo, such as sulphur emissions and / or land - use
changes, or natural variations in insolation and CO2 concentration could trigger abrupt transitions between different monsoon regimes.
It is well known that multiple factors are involved, including the
change in
planetary albedo,
change in nitrous oxide concentration,
change in methane concentration, and
change in CO2 concentration.
However, even a smaller figure (I had calculated about 0.17 W / m ^ 2 based on your inflated figure for total
planetary albedo, but you can check it out) is still significant when compared with the total flux imbalance, which I think is a more informative comparison than an arbitrarily selected
change in cloud cover, because it compares the sea ice reduction with the effects of all climate variations that have been operating in recent years..
The identified atmospheric feedbacks including
changes in
planetary albedo, in water vapour distribution and in meridional latent heat transport are all poorly represented in zonal energy balance model as the one used in [7] whereas they appear to be of primary importance when focusing on ancient greenhouse climates.
, a
change in
planetary albedo (forest die off?)
The cause could be any short or long term
change in a number of things solar output, ocean heat release,
planetary albedo, vapor, whatever.
Rayleigh - Benard Convection cloud physics result in
changes in
planetary albedo.
In order to determine the solar contribution, we have to start with the solar radiative forcing, which is the
change in total solar irradiance (TSI) in Watts per square meter (W / m2) divided by 4 to account for spherical geometry, and multiplied by 0.7 to account for
planetary albedo (Meehl 2002).
Global temps vary for many reasons beyond CO2 levels including but not limited to:
planetary motion,
changes in
albedo, stratospheric aerosols, and solar variability to name a few, but the only area of genuine study by the IPCC has been rising CO2 levels.
Greenhouse warming that is stronger over land and in the Northern Hemisphere tends to strengthen the monsoon, but increases in
planetary albedo over the continent due to aerosol forcing and / or land - use
change tend to weaken it.
The black line, reconstructed from ISCCP satellite data, «is a purely statistical parameter that has little physical meaning as it does not account for the non-linear relations between cloud and surface properties and
planetary albedo and does not include aerosol related
albedo changes such as associated with Mt. Pinatubo, or human emissions of sulfates for instance» (Real Climate).
In the past few years several attempts have been made to assess
changes in the Earth's
planetary albedo, and claims of global dimming and more recently brightening have been debated in journal articles and blogs alike.
Part of the
changes in the spatial correlations is expected to be due to convection and clouds, which too play a role for the GHG, in addition to influencing the
planetary albedo.
I would not regard heat being stored in the ocean and melting snow / ice but not completely melting it (and thereby
changing the surface
albedo), since this does not have any sort of direct
change to the
planetary radiative fluxes.