Temperature reconstruction for the Mid-Pleistocene Transition based on deep-dwelling foraminifera of IODP Site339-U1385
The mid-Pleistocene Transition (MPT; approx. 1.2-0.7 Ma), is characterized by growing Northern Hemisphere ice sheets and the shift from a 41 kyr to a 100 kyr glacial-interglacial cyclicity. Concomitant to the growth of large ice sheets, atmospheric and oceanic circulation pattern have changed. One k...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.882374 2023-05-15T17:32:01+02:00 Temperature reconstruction for the Mid-Pleistocene Transition based on deep-dwelling foraminifera of IODP Site339-U1385 Bahr, André Kaboth, Stefanie Hodell, David A Zeeden, Christian Fiebig, Jens Friedrich, Oliver MEDIAN LATITUDE: 37.571452 * MEDIAN LONGITUDE: -10.126042 * SOUTH-BOUND LATITUDE: 37.571416 * WEST-BOUND LONGITUDE: -10.126180 * NORTH-BOUND LATITUDE: 37.571490 * EAST-BOUND LONGITUDE: -10.125935 * DATE/TIME START: 2011-11-25T00:00:00 * DATE/TIME END: 2011-11-25T00:00:00 2017-11-01 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.882374 https://doi.org/10.1594/PANGAEA.882374 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.882374 https://doi.org/10.1594/PANGAEA.882374 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Bahr, André; Kaboth, Stefanie; Hodell, David A; Zeeden, Christian; Fiebig, Jens; Friedrich, Oliver (2018): Oceanic heat pulses fueling moisture transport towards continental Europe across the mid-Pleistocene transition. Quaternary Science Reviews, 179, 48-58, https://doi.org/10.1016/j.quascirev.2017.11.009 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.882374 https://doi.org/10.1016/j.quascirev.2017.11.009 2023-01-20T07:34:02Z The mid-Pleistocene Transition (MPT; approx. 1.2-0.7 Ma), is characterized by growing Northern Hemisphere ice sheets and the shift from a 41 kyr to a 100 kyr glacial-interglacial cyclicity. Concomitant to the growth of large ice sheets, atmospheric and oceanic circulation pattern have changed. One key feature of the North Atlantic is the wind-driven Subtropical Gyre, a major provider of heat and moisture for continental Europe. Here, we investigate changes in the strength and spatial configuration of the Subtropical Gyre during the MPT and its impact on the continental moisture balance. To reconstruct Subtropical Gyre dynamics, we conducted conducted paired d18O and Mg/Ca analyses on the deep-dwelling foraminifera Globorotalia inflata from Iberian Margin Site U1385 yielding thermocline temperature (Ttherm) variability between 1400-500 ka at the eastern boundary of the Subtropical Gyre. Long-term trends of Ttherm at Site U1385 oppose the North Atlantic climatic evolution of progressively intensified glacials during the MPT. Particularly, glacials MIS 20 and 18 were marked by warm thermocline waters off Iberia. We infer that a southward shift of the (sub)polar front displaced the source region of thermocline waters within the Subtropical Gyre from high to mid-latitudes. In addition, a strong Mediterranean Outflow Water production during the MPT caused the advection of warm waters to Iberia. Humid conditions during MIS 20 and 18 in SE Europe indicate that atmospheric moisture derived from this warm water might have been advected deep into continental Europe and contributed to enhanced growth of Alpine glaciers. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-10.126180,-10.125935,37.571490,37.571416) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP |
spellingShingle |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Bahr, André Kaboth, Stefanie Hodell, David A Zeeden, Christian Fiebig, Jens Friedrich, Oliver Temperature reconstruction for the Mid-Pleistocene Transition based on deep-dwelling foraminifera of IODP Site339-U1385 |
topic_facet |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP |
description |
The mid-Pleistocene Transition (MPT; approx. 1.2-0.7 Ma), is characterized by growing Northern Hemisphere ice sheets and the shift from a 41 kyr to a 100 kyr glacial-interglacial cyclicity. Concomitant to the growth of large ice sheets, atmospheric and oceanic circulation pattern have changed. One key feature of the North Atlantic is the wind-driven Subtropical Gyre, a major provider of heat and moisture for continental Europe. Here, we investigate changes in the strength and spatial configuration of the Subtropical Gyre during the MPT and its impact on the continental moisture balance. To reconstruct Subtropical Gyre dynamics, we conducted conducted paired d18O and Mg/Ca analyses on the deep-dwelling foraminifera Globorotalia inflata from Iberian Margin Site U1385 yielding thermocline temperature (Ttherm) variability between 1400-500 ka at the eastern boundary of the Subtropical Gyre. Long-term trends of Ttherm at Site U1385 oppose the North Atlantic climatic evolution of progressively intensified glacials during the MPT. Particularly, glacials MIS 20 and 18 were marked by warm thermocline waters off Iberia. We infer that a southward shift of the (sub)polar front displaced the source region of thermocline waters within the Subtropical Gyre from high to mid-latitudes. In addition, a strong Mediterranean Outflow Water production during the MPT caused the advection of warm waters to Iberia. Humid conditions during MIS 20 and 18 in SE Europe indicate that atmospheric moisture derived from this warm water might have been advected deep into continental Europe and contributed to enhanced growth of Alpine glaciers. |
format |
Dataset |
author |
Bahr, André Kaboth, Stefanie Hodell, David A Zeeden, Christian Fiebig, Jens Friedrich, Oliver |
author_facet |
Bahr, André Kaboth, Stefanie Hodell, David A Zeeden, Christian Fiebig, Jens Friedrich, Oliver |
author_sort |
Bahr, André |
title |
Temperature reconstruction for the Mid-Pleistocene Transition based on deep-dwelling foraminifera of IODP Site339-U1385 |
title_short |
Temperature reconstruction for the Mid-Pleistocene Transition based on deep-dwelling foraminifera of IODP Site339-U1385 |
title_full |
Temperature reconstruction for the Mid-Pleistocene Transition based on deep-dwelling foraminifera of IODP Site339-U1385 |
title_fullStr |
Temperature reconstruction for the Mid-Pleistocene Transition based on deep-dwelling foraminifera of IODP Site339-U1385 |
title_full_unstemmed |
Temperature reconstruction for the Mid-Pleistocene Transition based on deep-dwelling foraminifera of IODP Site339-U1385 |
title_sort |
temperature reconstruction for the mid-pleistocene transition based on deep-dwelling foraminifera of iodp site339-u1385 |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.882374 https://doi.org/10.1594/PANGAEA.882374 |
op_coverage |
MEDIAN LATITUDE: 37.571452 * MEDIAN LONGITUDE: -10.126042 * SOUTH-BOUND LATITUDE: 37.571416 * WEST-BOUND LONGITUDE: -10.126180 * NORTH-BOUND LATITUDE: 37.571490 * EAST-BOUND LONGITUDE: -10.125935 * DATE/TIME START: 2011-11-25T00:00:00 * DATE/TIME END: 2011-11-25T00:00:00 |
long_lat |
ENVELOPE(-10.126180,-10.125935,37.571490,37.571416) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Bahr, André; Kaboth, Stefanie; Hodell, David A; Zeeden, Christian; Fiebig, Jens; Friedrich, Oliver (2018): Oceanic heat pulses fueling moisture transport towards continental Europe across the mid-Pleistocene transition. Quaternary Science Reviews, 179, 48-58, https://doi.org/10.1016/j.quascirev.2017.11.009 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.882374 https://doi.org/10.1594/PANGAEA.882374 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.882374 https://doi.org/10.1016/j.quascirev.2017.11.009 |
_version_ |
1766129919817940992 |