Pollen from the deep-sea: A breakthrough in the mystery of the ice ages
Pollen from deep-sea sedimentary sequences provides an integrated regional reconstruction of vegetation and climate (temperature, precipitation, and seasonality) on the adjacent continent. More importantly, the direct correlation of pollen, marine and ice indicators allows comparison of the atmosphe...
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Online Access: | http://hdl.handle.net/10400.1/11515 https://doi.org/10.3389/fpls.2018.00038 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/11515 2023-05-15T14:03:08+02:00 Pollen from the deep-sea: A breakthrough in the mystery of the ice ages Goni, Maria F. Sanchez Desprat, Stephanie Fletcher, William J. Morales-Molino, Cesar Naughton, Filipa Oliveira, Dulce Urrego, Dunia H. Zorzi, Coralie 2018 http://hdl.handle.net/10400.1/11515 https://doi.org/10.3389/fpls.2018.00038 eng eng Frontiers Media Sa PTDC/AACCLI/100157/2008 IF/01489/2015 SFRH/BD/9079/2012 1664-462X http://hdl.handle.net/10400.1/11515 doi:10.3389/fpls.2018.00038 openAccess Last Glacial Period Subpolar North-Atlantic Meridional Overturning Circulation Millennial-Scale Variability Climatic Variability Iberian Margin Ocean Circulation Greenland Ice Antarctic Ice Interglacial Complex article 2018 ftunivalgarve https://doi.org/10.3389/fpls.2018.00038 2022-05-30T08:48:19Z Pollen from deep-sea sedimentary sequences provides an integrated regional reconstruction of vegetation and climate (temperature, precipitation, and seasonality) on the adjacent continent. More importantly, the direct correlation of pollen, marine and ice indicators allows comparison of the atmospheric climatic changes that have affected the continent with the response of the Earth's other reservoirs, i.e., the oceans and cryosphere, without any chronological uncertainty. The study of long continuous pollen records from the European margin has revealed a changing and complex interplay between European climate, North Atlantic sea surface temperatures (SSTs), ice growth and decay, and high-and low-latitude forcing at orbital and millennial timescales. These records have shown that the amplitude of the last five terrestrial interglacials was similar above 40 degrees N, while below 40 degrees N their magnitude differed due to precession-modulated changes in seasonality and, particularly, winter precipitation. These records also showed that vegetation response was in dynamic equilibrium with rapid climate changes such as the Dangaard-Oeschger (D-O) cycles and Heinrich events, similar in magnitude and velocity to the ongoing global warming. However, the magnitude of the millennial-scale warming events of the last glacial period was regionally-specific. Precession seems to have imprinted regions below 40 degrees N while obliquity, which controls average annual temperature, probably mediated the impact of D-O warming events above 40 degrees N. A decoupling between high-and low-latitude climate was also observed within last glacial warm (Greenland interstadials) and cold phases (Greenland stadials). The synchronous response of western European vegetation/climate and eastern North Atlantic SSTs to D-O cycles was not a pervasive feature throughout the Quaternary. During periods of ice growth such as MIS 5a/4, MIS 11c/b and MIS 19c/b, repeated millennial-scale cold-air/warm-sea decoupling events occurred on the European ... Article in Journal/Newspaper Antarc* Antarctic Greenland North Atlantic Universidade do Algarve: Sapienta Antarctic Greenland Frontiers in Plant Science 9 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Last Glacial Period Subpolar North-Atlantic Meridional Overturning Circulation Millennial-Scale Variability Climatic Variability Iberian Margin Ocean Circulation Greenland Ice Antarctic Ice Interglacial Complex |
spellingShingle |
Last Glacial Period Subpolar North-Atlantic Meridional Overturning Circulation Millennial-Scale Variability Climatic Variability Iberian Margin Ocean Circulation Greenland Ice Antarctic Ice Interglacial Complex Goni, Maria F. Sanchez Desprat, Stephanie Fletcher, William J. Morales-Molino, Cesar Naughton, Filipa Oliveira, Dulce Urrego, Dunia H. Zorzi, Coralie Pollen from the deep-sea: A breakthrough in the mystery of the ice ages |
topic_facet |
Last Glacial Period Subpolar North-Atlantic Meridional Overturning Circulation Millennial-Scale Variability Climatic Variability Iberian Margin Ocean Circulation Greenland Ice Antarctic Ice Interglacial Complex |
description |
Pollen from deep-sea sedimentary sequences provides an integrated regional reconstruction of vegetation and climate (temperature, precipitation, and seasonality) on the adjacent continent. More importantly, the direct correlation of pollen, marine and ice indicators allows comparison of the atmospheric climatic changes that have affected the continent with the response of the Earth's other reservoirs, i.e., the oceans and cryosphere, without any chronological uncertainty. The study of long continuous pollen records from the European margin has revealed a changing and complex interplay between European climate, North Atlantic sea surface temperatures (SSTs), ice growth and decay, and high-and low-latitude forcing at orbital and millennial timescales. These records have shown that the amplitude of the last five terrestrial interglacials was similar above 40 degrees N, while below 40 degrees N their magnitude differed due to precession-modulated changes in seasonality and, particularly, winter precipitation. These records also showed that vegetation response was in dynamic equilibrium with rapid climate changes such as the Dangaard-Oeschger (D-O) cycles and Heinrich events, similar in magnitude and velocity to the ongoing global warming. However, the magnitude of the millennial-scale warming events of the last glacial period was regionally-specific. Precession seems to have imprinted regions below 40 degrees N while obliquity, which controls average annual temperature, probably mediated the impact of D-O warming events above 40 degrees N. A decoupling between high-and low-latitude climate was also observed within last glacial warm (Greenland interstadials) and cold phases (Greenland stadials). The synchronous response of western European vegetation/climate and eastern North Atlantic SSTs to D-O cycles was not a pervasive feature throughout the Quaternary. During periods of ice growth such as MIS 5a/4, MIS 11c/b and MIS 19c/b, repeated millennial-scale cold-air/warm-sea decoupling events occurred on the European ... |
format |
Article in Journal/Newspaper |
author |
Goni, Maria F. Sanchez Desprat, Stephanie Fletcher, William J. Morales-Molino, Cesar Naughton, Filipa Oliveira, Dulce Urrego, Dunia H. Zorzi, Coralie |
author_facet |
Goni, Maria F. Sanchez Desprat, Stephanie Fletcher, William J. Morales-Molino, Cesar Naughton, Filipa Oliveira, Dulce Urrego, Dunia H. Zorzi, Coralie |
author_sort |
Goni, Maria F. Sanchez |
title |
Pollen from the deep-sea: A breakthrough in the mystery of the ice ages |
title_short |
Pollen from the deep-sea: A breakthrough in the mystery of the ice ages |
title_full |
Pollen from the deep-sea: A breakthrough in the mystery of the ice ages |
title_fullStr |
Pollen from the deep-sea: A breakthrough in the mystery of the ice ages |
title_full_unstemmed |
Pollen from the deep-sea: A breakthrough in the mystery of the ice ages |
title_sort |
pollen from the deep-sea: a breakthrough in the mystery of the ice ages |
publisher |
Frontiers Media Sa |
publishDate |
2018 |
url |
http://hdl.handle.net/10400.1/11515 https://doi.org/10.3389/fpls.2018.00038 |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Greenland North Atlantic |
genre_facet |
Antarc* Antarctic Greenland North Atlantic |
op_relation |
PTDC/AACCLI/100157/2008 IF/01489/2015 SFRH/BD/9079/2012 1664-462X http://hdl.handle.net/10400.1/11515 doi:10.3389/fpls.2018.00038 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.3389/fpls.2018.00038 |
container_title |
Frontiers in Plant Science |
container_volume |
9 |
_version_ |
1766273689409552384 |