scholarly journals The Spatial Distribution of Aeolian Dust and Terrigenous Fluxes in the Tropical Atlantic Ocean Since the Last Glacial Maximum

2021 ◽  
Vol 36 (2) ◽  
Author(s):  
George H. Rowland ◽  
Laura F. Robinson ◽  
Katharine R. Hendry ◽  
Hong Chin Ng ◽  
David McGee ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Atlantic Ocean ◽  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Tropical Atlantic ◽  
Tropical Atlantic Ocean ◽  
Aeolian Dust ◽  
Last Glacial ◽  
The Last Glacial Maximum ◽  
The Last Glacial

scholarly journals Spatial Patterns of Terrigenous Fluxes in the Tropical Atlantic Since the Last Glacial Maximum

2020 ◽  
Author(s):  
George H. Rowland ◽  
Laura F. Robinson ◽  
Katharine R. Hendry ◽  
Hong Chin Ng ◽  
David McGee ◽  
...  
Keyword(s):  
Last Glacial Maximum ◽  
Spatial Patterns ◽  
Glacial Maximum ◽  
Tropical Atlantic ◽  
Last Glacial ◽  
The Last Glacial Maximum ◽  
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.

Atlantic Ocean modulated hydroclimate of the subtropical northeastern Mexico since the last glacial maximum and comparison with the southern US

2016 ◽  
Vol 434 ◽  
pp. 141-150 ◽  
Author(s):  
Priyadarsi D. Roy ◽  
Axel Rivero-Navarrete ◽  
José L. Sánchez-Zavala ◽  
Laura E. Beramendi-Orosco ◽  
Gowrappan Muthu-Sankar ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Last Glacial ◽  
Southern Us ◽  
Northeastern Mexico ◽  
The Last Glacial Maximum ◽  
The Last Glacial

scholarly journals The impacts of Meltwater Pulse-1A in the South Atlantic Ocean deep circulation since the Last Glacial Maximum

2013 ◽  
Vol 9 (6) ◽  
pp. 6375-6395 ◽  
Author(s):  
J. M. Marson ◽  
I. Wainer ◽  
Z. Liu ◽  
M. M. Mata
Keyword(s):  
Atlantic Ocean ◽  
Sea Level ◽  
Last Glacial Maximum ◽  
South Atlantic ◽  
Glacial Maximum ◽  
South Atlantic Ocean ◽  
The South ◽  
Last Glacial ◽  
The Last Glacial Maximum ◽  
The Last Glacial

Abstract. Since 21 000 yr ago, the oceans have received large amounts of freshwater in pulses coming from the melting ice sheets. A specific event, known as meltwater pulse 1A (MWP-1A), has been identified in sea-level and temperature proxy records as responsible for the increase of ~20 m in sea level in less than 500 yr. Although its origin and timing are still under discussion, MWP-1A seems to have had a significant impact on several components of the climatic system. The present work aims to elucidate these impacts on the water mass distribution of the South Atlantic Ocean through the analysis of a transient simulation of the climate evolution from the Last Glacial Maximum to Present Day using a state-of-art CGCM, the National Center for Atmospheric Research Community Climate System Model version 3 (NCAR CCSM3). Results show that the freshwater discharge associated with the timing of MWP-1A was crucial to establish the present thermohaline structure associated with the North Atlantic Deep Water, marking the transition between a shallower and a deeper Atlantic Meridional Overturning Circulation.

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