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| Takano, Yohei; Ito, Takamitsu; Deutsch, Curtis. |
| We explore centennial changes in tropical Pacific oxygen (O-2) using numerical models to illustrate the dominant patterns and mechanisms under centennial climate change. Future projections from state-of-the-art Earth System Models exhibit significant model to model differences, but decreased solubility and weakened ventilation together deplete thermocline O-2 in middle to high latitudes. In contrast, the tropical thermocline O-2 undergoes much smaller changes or even a slight increase. A suite of sensitivity experiments using a coarse resolution ocean circulation and biogeochemistry model show that ocean warming is the leading cause of global deoxygenation in the thermocline across all latitudes with secondary contributions from changes in hydrological... |
| Tipo: Text |
Palavras-chave: Oxygen trends; Climate change; Centennial timescale. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00675/78682/80883.pdf |
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| Davis, Catherine V.; Myhre, Sarah E.; Deutsch, Curtis; Caissie, Beth; Praetorius, Summer; Borreggine, Marisa; Thunell, Robert. |
| Deglacial sea surface conditions in the subarctic North Pacific and marginal seas are the subject of increasing interest in paleoceanography. However, a cohesive picture of near-surface oceanography from which to compare inter and intra-regional variability through the last deglaciation is lacking. We present a synthesis of sea surface temperature covering the open North Pacific and its marginal seas, spanning the past 20 ka using proxy records from foraminiferal calcite (δ18O and Mg/Ca) and coccolithophore alkenones (Uk’37). Sea surface temperature proxies tend to be in agreement through the Holocene, though Uk’37 records are often interpreted as warmer than adjacent δ18O or Mg/Ca records during the Last Glacial Maximum and early deglaciation. In the Sea... |
| Tipo: Text |
Palavras-chave: Sea surface temperature; North Pacific; Bering sea; Sea of Okhotsk; Deglaciation. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00646/75814/76758.pdf |
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