Not exact matches
Regional variations arise because the
Earth's gravity field is affected in multiple ways by the melt of ice,
due to the direct effect of surface mass changes (the gravity field is determined by the distribution of mass), the consequent deformation of the
Solid Earth (removing a load causes the
Earth's surface to rebound, which in turn changes the distribution of the
Earth's mass), the consequent redistribution of ocean water (the ocean surface is shaped by the gravity filed) and perturbations of the
Earth's rotation axis (because of mass redistribution).
On million - year time scales, CO2 levels change
due to tectonic activity, which affects the rates of CO2 exchange of ocean and atmosphere with the
solid Earth.
The GRACE observations over Antarctica suggest a near - zero change
due to combined ice and
solid earth mass redistribution; the magnitude of our GIA correction is substantially smaller than previous models have suggested and hence we produce a systematically lower estimate of ice mass change from GRACE data: we estimate that Antarctica has lost 69 ± 18 Gigatonnes per year (Gt / yr) into the oceans over 2002 - 2010 — equivalent to +0.19 mm / yr globally - averaged sea level change, or about 6 % of the sea - level change during that period.
The assertion that you must invalidate is that the
earth would freeze
solid were it not
due to the GHG effect of CO2.
BatedBreath December 12, 2012 at 5:24 am said:» The assertion that you must invalidate is that the
earth would freeze
solid were it not
due to the GHG effect of CO2».
Short term LOD change is almost entirely
due to interactions between ocean mass and
solid Earth, for one reason or another.
In fact, were CO2 to ever fall that low, the
Earth would freeze
solid due to the lack of greenhouse gas forcing and its associated positive feedback.