Fast and slow components of interstadial warming in the North Atlantic during the last glacial
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Fast and slow components of interstadial warming in the North Atlantic during the last glacial. / Margari, Vasiliki; Skinner, Luke C.; Menviel, Laurie; Capron, Emilie; Rhodes, Rachael H.; Mleneck-Vautravers, Maryline J.; Ezat, Mohamed M.; Martrat, Belen; Grimalt, Joan O.; Hodell, David A.; Tzedakis, Polychronis C.
In: Communications Earth & Environment, Vol. 1, No. 1, 6, 13.08.2020.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - Fast and slow components of interstadial warming in the North Atlantic during the last glacial
AU - Margari, Vasiliki
AU - Skinner, Luke C.
AU - Menviel, Laurie
AU - Capron, Emilie
AU - Rhodes, Rachael H.
AU - Mleneck-Vautravers, Maryline J.
AU - Ezat, Mohamed M.
AU - Martrat, Belen
AU - Grimalt, Joan O.
AU - Hodell, David A.
AU - Tzedakis, Polychronis C.
PY - 2020/8/13
Y1 - 2020/8/13
N2 - The abrupt nature of warming events recorded in Greenland ice-cores during the last glacial has generated much debate over their underlying mechanisms. Here, we present joint marine and terrestrial analyses from the Portuguese Margin, showing a succession of cold stadials and warm interstadials over the interval 35-57 ka. Heinrich stadials 4 and 5 contain considerable structure, with a short transitional phase leading to an interval of maximum cooling and aridity, followed by slowly increasing sea-surface temperatures and moisture availability. A climate model experiment reproduces the changes in western Iberia during the final part of Heinrich stadial 4 as a result of the gradual recovery of the Atlantic meridional overturning circulation. What emerges is that Greenland ice-core records do not provide a unique template for warming events, which involved the operation of both fast and slow components of the coupled atmosphere-ocean-sea-ice system, producing adjustments over a range of timescales. Interstadial North Atlantic warming during the last glacial period involved the operation of both fast and slow components of the coupled atmosphere-ocean-sea-ice system, according to analyses from the Portuguese Margin and climate model simulations.
AB - The abrupt nature of warming events recorded in Greenland ice-cores during the last glacial has generated much debate over their underlying mechanisms. Here, we present joint marine and terrestrial analyses from the Portuguese Margin, showing a succession of cold stadials and warm interstadials over the interval 35-57 ka. Heinrich stadials 4 and 5 contain considerable structure, with a short transitional phase leading to an interval of maximum cooling and aridity, followed by slowly increasing sea-surface temperatures and moisture availability. A climate model experiment reproduces the changes in western Iberia during the final part of Heinrich stadial 4 as a result of the gradual recovery of the Atlantic meridional overturning circulation. What emerges is that Greenland ice-core records do not provide a unique template for warming events, which involved the operation of both fast and slow components of the coupled atmosphere-ocean-sea-ice system, producing adjustments over a range of timescales. Interstadial North Atlantic warming during the last glacial period involved the operation of both fast and slow components of the coupled atmosphere-ocean-sea-ice system, according to analyses from the Portuguese Margin and climate model simulations.
KW - MILLENNIAL-SCALE VARIABILITY
KW - ABRUPT CLIMATE-CHANGE
KW - OCEAN
KW - CIRCULATION
KW - SYSTEM
KW - OSCILLATIONS
KW - SEDIMENTS
KW - PATTERNS
KW - RAINFALL
KW - MONSOON
U2 - 10.1038/s43247-020-0006-x
DO - 10.1038/s43247-020-0006-x
M3 - Journal article
VL - 1
JO - Communications Earth and Environment
JF - Communications Earth and Environment
SN - 2662-4435
IS - 1
M1 - 6
ER -
ID: 270164823