A 23,000-Year Record of Surface Water pH and PCO2 in the Western Equatorial Pacific Ocean

@article{Palmer2003A2R,
  title={A 23,000-Year Record of Surface Water pH and PCO2 in the Western Equatorial Pacific Ocean},
  author={Martin R Palmer and Paul N. Pearson},
  journal={Science},
  year={2003},
  volume={300},
  pages={480 - 482}
}
The oceans play a major role in defining atmospheric carbon dioxide (CO2) levels, and although the geographical distribution of CO2 uptake and release in the modern ocean is understood, little is known about past distributions. Boron isotope studies of planktonic foraminifera from the western equatorial Pacific show that this area was a strong source of CO2 to the atmosphere between approximately 13,800 and 15,600 years ago. This observation is most compatible with increased frequency of La Nin… 
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References

SHOWING 1-10 OF 19 REFERENCES
ENSO-like forcing on oceanic primary production during the Late Pleistocene.
TLDR
Late Pleistocene changes in oceanic primary productivity along the equator in the Indian and Pacific oceans are revealed by quantitative changes in nanoplankton communities preserved in nine deep-sea cores, suggesting an important role for equatorial biological productivity in modifying atmospheric CO2.
Holocene carbon-cycle dynamics based on CO2 trapped in ice at Taylor Dome, Antarctica
A high-resolution ice-core record of atmospheric CO2 concentration over the Holocene epoch shows that the global carbon cycle has not been in steady state during the past 11,000 years. Analysis of…
Glacial/interglacial variations in atmospheric carbon dioxide
TLDR
A version of the hypothesis that the whole-ocean reservoir of algal nutrients was larger during glacial times, strengthening the biological pump at low latitudes, where these nutrients are currently limiting is presented.
Magnitude and timing of temperature change in the Indo-Pacific warm pool during deglaciation
TLDR
Observations suggest that the tropical Pacific region plays an important role in driving glacial—interglacial cycles, possibly through a system similar to how El Niño/Southern Oscillation regulates the poleward flux of heat and water vapour.
Abrupt intensification of the SW Indian Ocean monsoon during the last deglaciation: constraints from Th, Pa, and He isotopes
Super ENSO and Global Climate Oscillations at Millennial Time Scales
The late Pleistocene history of seawater temperature and salinity variability in the western tropical Pacific warm pool is reconstructed from oxygen isotope (δ18O) and magnesium/calcium composition…
Box cores from the equatorial Pacific: 14C sedimentation rates and benthic mixing
Reconstructing past ocean pH-depth profiles
TLDR
Results for five time windows from the middle Miocene to the late Pleistocene indicate pH-depth profiles similar to that of the modern ocean in this area, which suggests that this method may greatly aid in the understanding of the global carbon cycle.
Dual modes of the carbon cycle since the Last Glacial Maximum
TLDR
The global carbon cycle is shown to have operated in two distinct primary modes on the timescale of thousands of years, one when climate was changing relatively slowly and another when warming was rapid, each with a characteristic average stable-carbon-isotope composition of the net CO2 exchanged by the atmosphere with the land and oceans.
El Niño-Like Pattern in Ice Age Tropical Pacific Sea Surface Temperature
TLDR
Climate variability in this region from the Last Glacial Maximum to the present is examined, using a SST record reconstructed from magnesium/calcium ratios in foraminifera from sea-floor sediments near the Galápagos Islands, supporting a potent role for altered tropical Pacific SST gradients in global climate variations.
...
1
2
...