scholarly journals Sea surface temperatures in the equatorial and South Atlantic Ocean during the Last Glacial Maximum (23-19 ka)

2003 ◽  
Vol 18 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
H.-S. Niebler ◽  
H. W. Arz ◽  
B. Donner ◽  
S. Mulitza ◽  
J. Pätzold ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Last Glacial Maximum ◽  
South Atlantic ◽  
Glacial Maximum ◽  
South Atlantic Ocean ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Last Glacial ◽  
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.

Terrestrial Conditions at the Last Glacial Maximum and CLIMAP Sea-Surface Temperature Estimates: Are They Consistent?

1985 ◽  
Vol 24 (1) ◽  
pp. 1-22 ◽  
Author(s):  
D. Rind ◽  
D. Peteet
Keyword(s):  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Sea Surface ◽  
Radiation Balance ◽  
Sea Surface Temperatures ◽  
Last Glacial ◽  
Surface Temperatures ◽  
Low Latitudes ◽  
The Last Glacial Maximum ◽  
The Last Glacial

CLIMAP (1981, “Seasonal Reconstruction of the Earth's Surface at the Last Glacial Maximum,” Geological Society of America Map and Chart Series MC-36) boundary conditions were used as inputs to the GISS general circulation model, and the last glacial maximum (LGM) climate was simulated for six model years. The simulation was compared with snow line depression and pollen-inferred temperature data at low latitudes, specifically for Hawaii, Colombia, East Africa, and New Guinea. The model does not produced as much cooling at low latitudes as is implied by the terrestrial evidence. An alternative experiment in which the CLIMAP sea-surface temperatures were uniformly lowered by 2°C produces a better fit to the land data although in Hawaii model temperatures are still too warm. The relatively warm CLIMAP tropical sea-surface temperatures also provide for only a slight decrease in the hydrologic cycle in the model, in contrast to both evidence of LGM tropical aridity and the results of the experiment with colder ocean temperatures. With the CLIMAP sea-surface temperatures, the LGM global annual mean surface air temperature is 3.6°C colder than at present; if the ocean temperatures were allowed to cool in conformity with the model's radiation balance, the LGM simulation would be 5°–6°C colder than today, and in better agreement with the tropical land evidence.

scholarly journals Sea-surface temperatures of the southwest Pacific Ocean during the Last Glacial Maximum

2000 ◽  
Vol 15 (1) ◽  
pp. 95-109 ◽  
Author(s):  
T. T. Barrows ◽  
S. Juggins ◽  
P. De Deckker ◽  
J. Thiede ◽  
J. I. Martinez
Keyword(s):  
Pacific Ocean ◽  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Southwest Pacific ◽  
Last Glacial ◽  
Surface Temperatures ◽  
The Last Glacial Maximum ◽  
The Last Glacial
Sign in / Sign up

Export Citation Format

Share Document