Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cycles

The MIS 17 interglacial, ~715 675 ka, marks the end of the Mid-Pleistocene Transition as intensified, long and asymmetrical 100-kyr ice age cycles became eminently established. Increasing arrival of moisture to the Northern Hemisphere high latitudes, resulting from the northwestward migration of the...

ver descrição completa

Detalhes bibliográficos
Autores: Sánchez Goñi, M. F., Ferretti, P., Polanco-Martínez, J.M., Rodrigues, T., Alonso-García, M., Rodríguez Tovar, Francisco Javier, Dorador, J., Desprat, S.
Formato: artículo
Fecha de publicación:2019
País:España
Recursos:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/61236
Acesso em linha:http://hdl.handle.net/10810/61236
Access Level:acceso abierto
Palavra-chave:Mid-Pleistocene Transition
pollen
precipitation
southwestern Europe
temperature
vegetation
id ES_73d714ea2177dd6f0a34e94981d1fb8e
oai_identifier_str oai:addi.ehu.eus:10810/61236
network_acronym_str ES
network_name_str España
repository_id_str
spelling Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cyclesSánchez Goñi, M. F.Ferretti, P.Polanco-Martínez, J.M.Rodrigues, T.Alonso-García, M.Rodríguez Tovar, Francisco JavierDorador, J.Desprat, S.Mid-Pleistocene Transitionpollenprecipitationsouthwestern EuropetemperaturevegetationThe MIS 17 interglacial, ~715 675 ka, marks the end of the Mid-Pleistocene Transition as intensified, long and asymmetrical 100-kyr ice age cycles became eminently established. Increasing arrival of moisture to the Northern Hemisphere high latitudes, resulting from the northwestward migration of the Subpolar Front and the intensification of the Norwegian Greenland Seas (NGS) convection, has been put forward to explain the emergence of this quasi-periodic 100-kyr cycle. However, testing this hypothesis is problematic with the available North Atlantic precipitation data. Here we present new pollen-based quantitative seasonal climate reconstructions from the southwestern Iberian margin that track changes in the position and intensity of the westerlies. Our data compared to changes in North Atlantic deep and surface water conditions show that MIS 17 interglacial was marked by three major changes in the direction and strength of the westerlies tightly linked to oceanographic changes. In particular, we report here for the first time a drastic two-steps northward shift of the westerlies centered at ~693 ka that ended up with the sustained precipitation over southern European. This atmospheric reorganization was associated with northwestward migration of the Subpolar Front, strengthening of the NGS deep water formation and cooling of the western North Atlantic region. This finding points to the substantial arrival of moisture to the Northern Hemisphere high latitudes at the time of the decrease in summer energy and insolation contributing to the establishment of strong 100-kyr cycles. © 2019 Elsevier B.V.J.M.P.M. was funded by a Basque Government post-doctoral fellowship ( POS_2015_1_0006 ) and MAG and TR by FCT ( PTDC/MAR-PRO/3396/2014 , UID/Multi/04326/2013 , SFRH/BPD/96960/2013 , SFRH/BPD/108600/2015 ). We acknowledge C. Morales-Molino and D. Oliveira for the reading of the manuscript and V. Hanquiez for drawing Figs. 1 and 9 . We are grateful to Ludovic Devaux for pollen sample preparation. J.M.P.M. was funded by a Basque Government post-doctoral fellowship (POS_2015_1_0006) and MAG and TR by FCT (PTDC/MAR-PRO/3396/2014, UID/Multi/04326/2013, SFRH/BPD/96960/2013, SFRH/BPD/108600/2015). We acknowledge C. Morales-Molino and D. Oliveira for the reading of the manuscript and V. Hanquiez for drawing Figs. 1 and 9. We are grateful to Ludovic Devaux for pollen sample preparation.Earth and Planetary Science Letters202320232019info:eu-repo/semantics/articlehttp://hdl.handle.net/10810/61236reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/Basquegovernment/POS_2015_1_0006/https://dx.doi.org/10.1016/j.epsl.2019.01.032info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/3.0/es/© 2019 Elsevier B.V. All rights reserved.Atribución-NoComercial-CompartirIgual 3.0 Españaoai:addi.ehu.eus:10810/612362026-06-18T09:23:17Z
dc.title.none.fl_str_mv Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cycles
title Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cycles
spellingShingle Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cycles
Sánchez Goñi, M. F.
Mid-Pleistocene Transition
pollen
precipitation
southwestern Europe
temperature
vegetation
title_short Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cycles
title_full Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cycles
title_fullStr Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cycles
title_full_unstemmed Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cycles
title_sort Pronounced northward shift of the westerlies during MIS 17 leading to the strong 100-kyr ice age cycles
dc.creator.none.fl_str_mv Sánchez Goñi, M. F.
Ferretti, P.
Polanco-Martínez, J.M.
Rodrigues, T.
Alonso-García, M.
Rodríguez Tovar, Francisco Javier
Dorador, J.
Desprat, S.
author Sánchez Goñi, M. F.
author_facet Sánchez Goñi, M. F.
Ferretti, P.
Polanco-Martínez, J.M.
Rodrigues, T.
Alonso-García, M.
Rodríguez Tovar, Francisco Javier
Dorador, J.
Desprat, S.
author_role author
author2 Ferretti, P.
Polanco-Martínez, J.M.
Rodrigues, T.
Alonso-García, M.
Rodríguez Tovar, Francisco Javier
Dorador, J.
Desprat, S.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Mid-Pleistocene Transition
pollen
precipitation
southwestern Europe
temperature
vegetation
topic Mid-Pleistocene Transition
pollen
precipitation
southwestern Europe
temperature
vegetation
description The MIS 17 interglacial, ~715 675 ka, marks the end of the Mid-Pleistocene Transition as intensified, long and asymmetrical 100-kyr ice age cycles became eminently established. Increasing arrival of moisture to the Northern Hemisphere high latitudes, resulting from the northwestward migration of the Subpolar Front and the intensification of the Norwegian Greenland Seas (NGS) convection, has been put forward to explain the emergence of this quasi-periodic 100-kyr cycle. However, testing this hypothesis is problematic with the available North Atlantic precipitation data. Here we present new pollen-based quantitative seasonal climate reconstructions from the southwestern Iberian margin that track changes in the position and intensity of the westerlies. Our data compared to changes in North Atlantic deep and surface water conditions show that MIS 17 interglacial was marked by three major changes in the direction and strength of the westerlies tightly linked to oceanographic changes. In particular, we report here for the first time a drastic two-steps northward shift of the westerlies centered at ~693 ka that ended up with the sustained precipitation over southern European. This atmospheric reorganization was associated with northwestward migration of the Subpolar Front, strengthening of the NGS deep water formation and cooling of the western North Atlantic region. This finding points to the substantial arrival of moisture to the Northern Hemisphere high latitudes at the time of the decrease in summer energy and insolation contributing to the establishment of strong 100-kyr cycles. © 2019 Elsevier B.V.
publishDate 2019
dc.date.none.fl_str_mv 2019
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/61236
url http://hdl.handle.net/10810/61236
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/Basquegovernment/POS_2015_1_0006/
https://dx.doi.org/10.1016/j.epsl.2019.01.032
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/3.0/es/
© 2019 Elsevier B.V. All rights reserved.
Atribución-NoComercial-CompartirIgual 3.0 España
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/3.0/es/
© 2019 Elsevier B.V. All rights reserved.
Atribución-NoComercial-CompartirIgual 3.0 España
dc.publisher.none.fl_str_mv Earth and Planetary Science Letters
publisher.none.fl_str_mv Earth and Planetary Science Letters
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869410838780051456
score 15,228081

Registos relacionados