Tenth Year Annual Report:
Carbon Science: Science Results - 2010
- Statistical analysis confirms that a step increase in terrestrial carbon uptake occurred around
1988 and indicates that the change is on the order of 0.8 PgC/yr.
- A data-assimilation system has been added to constrain the GFDL-Princeton carbon cycle
model with forest inventory and eddy covariance data so that it will better predict the future
of the land carbon sink.
- A new high-precision instrument has been developed to continuously measure DIC in surface
waters and give information on anthropogenic CO2 uptake and ocean fertility changes.
- Field and lab experiments mimicking ocean acidification show decreased bioavailability of
some essential trace metals and enzymes with lower surface water pH, an effect with
potential to limit CO2 fertilization in the ocean.
- Techniques for analyzing nitrogen isotopes in diatoms have been extended to foraminifera,
which will provide an independent constraint on the surface water chemistry of ice age polar
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