Fossil fuel flux (rate) and change in reservoir size are more than a decade old.
Natural CO2 removal by rock weathering is about 1 billion tons (GT or PgC) per year. That speeds up with higher temperatures, but not enough to fully offset larger carbon pulses (e.g. from permafrost and subsea methane hydrates. Still, it is a roughly fixed amount, while the size of pulses is variable.
A pulse of 1 billion tons is comparable to natural removal rates, so the % remaining after a few years is low. On the other hand, a pulse (e.g., human emissions since 1900) is far more than the natural removal rate, so most of it will remain in the air after many years.
Map below is from NASA, May 2011 - in metric tonnes of carbon per hectare. About 250 hectares per square mile. Total Biomass Carbon is apparently for above-ground carbon only. Mg = tonnes.
Permafrost covers 1/6 to 1/4 of northern hemisphere land surface, 15-25 million square kilometers. Its top 10 feet hold ~ 1.9 trillion tons of carbon. That's 1,200 tonnes (Mg) / hectare (120 kg/sq m, 12 g/sq cm) — which is 6-7 times what NASA shows for tropical rainforests. Mongabay et al. estimate 168-420 (µ 302) Mg / hectare for various tropical rainforests, a bit more than NASA.
Below is world soil organic carbon density (tons / hectare, as above). by USDA: Natural Resource Conservation Service, 2000.
Soil carbon densities for most of Russia, Siberia, Europe, Alaska, and Canada exceed total tropical ones for soil + trees.
Albedo measures reflection.
% change from average (mean, µ) , from American Meteorological Association (full study available on Overviews page).
The trend is that Earth is getting darker. This is consistent with ice loss.
Section Map: Reversing Climate Change