Current and Productivity Patterns in the Equatorial Pacific across the Last Glacial Maximum Based on Radiolarian East-West and Downcore Faunal Gradients

1992 ◽  
Vol 38 (4) ◽  
pp. 397 ◽  
Author(s):  
Demetrio Boltovskoy
Keyword(s):  
Last Glacial Maximum ◽  
Equatorial Pacific ◽  
Glacial Maximum ◽  
Last Glacial ◽  
The Last Glacial Maximum ◽  
East West ◽  
The Last Glacial

scholarly journals Interannual Variability in the Tropical Atlantic from the Last Glacial Maximum into Future Climate Projections simulated by CMIP5/PMIP3

2017 ◽  
Author(s):  
Chris Brierley ◽  
Ilana Wainer
Keyword(s):  
Climate Change ◽  
Last Glacial Maximum ◽  
Equatorial Pacific ◽  
Glacial Maximum ◽  
Future Climate ◽  
Climate Projections ◽  
Tropical Atlantic ◽  
Last Glacial ◽  
The Last Glacial Maximum ◽  
The Last Glacial

Abstract. Tropical Atlantic Variability (TAV) plays an important role in driving year-to-year changes in rainfall over Africa and South America. In this study, its response to global climate change is investigated through a series of multi-model experiments. We explore the leading modes of TAV during the historical, last glacial maximum, mid-Holocene and future simulations in the multi-model ensemble known as PMIP3/CMIP5. Despite their known sea surface temperature biases, most of the models are able to capture the Tropical Atlantic's two leading modes of SST-variability patterns – the Atlantic Meridional Mode (AMM) and the Atlantic zonal mode (also called the Atlantic Niño or ATL3). The ensemble suggests that AMM amplitude was less during the mid-Holocene and increased during the last glacial maximum; but is equivocal about future changes. ATL3 appears stronger under both the last glacial maximum and future climate changes, with little consistent message about the mid-Holocene. The patterns and the regions under the influence of the two modes alters under climate change – in concert with changes in the mean climate state. Both modes demonstrate a coupling with the equatorial Pacific that depends on the climate period being considered – especially for the ATL3 mode of equatorial Pacific. In the future climate experiment, the equatorial mode weakens, the whole northern hemisphere warms up while the south Atlantic displays an hemisphere-wide weak oscillating pattern. For the LGM, the AMM projects onto a pattern that resembles the Pan-Atlantic Decadal Oscillation. No robust relationships between the amplitude of the zonal and meridional temperature gradients and their respective variability was found.

scholarly journals Central Equatorial Pacific Cooling During the Last Glacial Maximum

2021 ◽  
Vol 48 (3) ◽  
Author(s):  
Minda Moriah Monteagudo ◽  
Jean Lynch‐Stieglitz ◽  
Thomas M. Marchitto ◽  
Matthew W. Schmidt
Keyword(s):  
Last Glacial Maximum ◽  
Equatorial Pacific ◽  
Glacial Maximum ◽  
Last Glacial ◽  
Central Equatorial Pacific ◽  
The Last Glacial Maximum ◽  
The Last Glacial
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