EPS 8

Borehole paleothermometry reveals a mean global ground-temperature increase over the past ~100 years of

1 K

The acidified ocean is returned to its original pH on a timescale of

10,000 years

After ocean acidification and dissolution of calcium carbonate, silicate weathering removes the remaining 20% of the extra carbon still in the atmosphere on a timescale of

100,000 years

Ocean acidification puts 60% of the carbon burned by humans into the ocean on a timescale of

1000 years

By how much have Berkeley's warm-season maximum temperatures increased over the past 125 years?

2 K

Roughly what fraction of the carbon burned by humans is still in the atmosphere as CO2 after 10,000 years?

20%

If humans burn 5000 GtC in a couple centuries, roughly what will the atmospheric concentration of CO2 be in the year 12017?

750 ppm

What chemical reaction ultimately removes the excess carbon from the atmosphere and ocean?

CaSiO3 + CO2 → CaCO3 + SiO2

An AMSU measures temperature at many heights in the atmosphere by measuring atmospheric emission at multiple wavelengths on the side of an oxygen resonance that each have a different

k and so a different τ=1 level

AMSU records show the atmosphere

warming at low latitudes and cooling at high latitudes