scholarly journals Atmosphere‐Ocean CO 2 Exchange Across the Last Deglaciation From the Boron Isotope Proxy

2019 ◽  
Vol 34 (10) ◽  
pp. 1650-1670 ◽  
Author(s):  
Jun Shao ◽  
Lowell D. Stott ◽  
William R. Gray ◽  
Rosanna Greenop ◽  
Ingo Pecher ◽  
...  
Keyword(s):  
Boron Isotope ◽  
Last Deglaciation ◽  
The Last Deglaciation

scholarly journals Oceans Vented Carbon Dioxide During the Last Deglaciation

Eos ◽  
2019 ◽  
Vol 100 ◽  
Author(s):  
Kate Wheeling
Keyword(s):  
Carbon Dioxide ◽  
Late Pleistocene ◽  
Marine Sediments ◽  
Complete Picture ◽  
Boron Isotope ◽  
Carbon Dioxide Exchange ◽  
Last Deglaciation ◽  
Ocean Atmosphere ◽  
Isotope Record ◽  
The Last Deglaciation

A new boron isotope record from South Pacific marine sediments offers a more complete picture of ocean-atmosphere carbon dioxide exchange during the late Pleistocene.

scholarly journals Boron isotope evidence for oceanic carbon dioxide leakage during the last deglaciation

Nature ◽  
2015 ◽  
Vol 518 (7538) ◽  
pp. 219-222 ◽  
Author(s):  
M. A. Martínez-Botí ◽  
G. Marino ◽  
G. L. Foster ◽  
P. Ziveri ◽  
M. J. Henehan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Boron Isotope ◽  
Last Deglaciation ◽  
Carbon Dioxide Leakage ◽  
Isotope Evidence ◽  
The Last Deglaciation ◽  
Oceanic Carbon

Black Sea paleosalinity evolution since the last deglaciation reconstructed from alkenone-inferred Isochrysidales diversity

2021 ◽  
Vol 564 ◽  
pp. 116881
Author(s):  
Yongsong Huang ◽  
Yinsui Zheng ◽  
Patrick Heng ◽  
Liviu Giosan ◽  
Marco J.L. Coolen
Keyword(s):  
Black Sea ◽  
Last Deglaciation ◽  
The Last Deglaciation

scholarly journals Hydrographic shifts south of Australia over the last deglaciation and possible interhemispheric linkages

2021 ◽  
pp. 1-12
Author(s):  
Matthias Moros ◽  
Patrick De Deckker ◽  
Kerstin Perner ◽  
Ulysses S. Ninnemann ◽  
Lukas Wacker ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Southern Hemisphere ◽  
Critical Role ◽  
Temperature Response ◽  
South Australia ◽  
Last Deglaciation ◽  
Tight Coupling ◽  
Oceanic Fronts ◽  
The Last Deglaciation ◽  
Circumpolar Current

Abstract Northern and southern hemispheric influences—particularly changes in Southern Hemisphere westerly winds (SSW) and Southern Ocean ventilation—triggered the stepwise atmospheric CO2 increase that accompanied the last deglaciation. One approach for gaining potential insights into past changes in SWW/CO2 upwelling is to reconstruct the positions of the northern oceanic fronts associated with the Antarctic Circumpolar Current. Using two deep-sea cores located ~600 km apart off the southern coast of Australia, we detail oceanic changes from ~23 to 6 ka using foraminifer faunal and biomarker alkenone records. Our results indicate a tight coupling between hydrographic and related frontal displacements offshore South Australia (and by analogy, possibly the entire Southern Ocean) and Northern Hemisphere (NH) climate that may help confirm previous hypotheses that the westerlies play a critical role in modulating CO2 uptake and release from the Southern Ocean on millennial and potentially even centennial timescales. The intensity and extent of the northward displacements of the Subtropical Front following well-known NH cold events seem to decrease with progressing NH ice sheet deglaciation and parallel a weakening NH temperature response and amplitude of Intertropical Convergence Zone shifts. In addition, an exceptional poleward shift of Southern Hemisphere fronts occurs during the NH Heinrich Stadial 1. This event was likely facilitated by the NH ice maximum and acted as a coup-de-grâce for glacial ocean stratification and its high CO2 capacitance. Thus, through its influence on the global atmosphere and on ocean mixing, “excessive” NH glaciation could have triggered its own demise by facilitating the destratification of the glacial ocean CO2 state.

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