Monsoonal Forcing of European Ice-Sheet Dynamics During the Late Quaternary

Stefanie Kaboth-Bahr; André Bahr; Christian Zeeden; Samuel Toucanne; Frédérique Eynaud; Francisco Jiménez-Espejo; Ursula Röhl; Oliver Friedrich; Jörg Pross; Ludvig Löwemark; Lucas J. Lourens

doi:10.1029/2018GL078751

Monsoonal Forcing of European Ice-Sheet Dynamics During the Late Quaternary

Stefanie Kaboth-Bahr^*
, André Bahr
, Christian Zeeden
, Samuel Toucanne
, Frédérique Eynaud
, Francisco Jiménez-Espejo
, Ursula Röhl
, Oliver Friedrich
, Jörg Pross
, Ludvig Löwemark
, Lucas J. Lourens

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The dynamics of Northern Hemisphere ice sheets during Late Quaternary glacials have yet been dominantly examined from a Laurentide Ice Sheet perspective, which helped shaping the idea of moisture-starved glacials and small-scale ice volume variability. However, the waxing and waning of the European Ice Sheet (EIS) casts doubt on this perception. Understanding EIS dynamics under glacial boundary conditions is crucial because its meltwater pulses influence global climate by weakening deepwater formation in the North Atlantic Ocean. Here we show that the advection of subtropical water toward the continental margin of western Europe lead to enhanced moisture availability on the continent and fueled the growth of EIS lobes during glacials. This warm-water pooling was caused by monsoonally paced enhanced Mediterranean Outflow Water (MOW) entrainment that dragged subtropical surface waters toward the European margin. This mechanism presents a yet unrecognized marine-terrestrial pathway that allows low-latitude forcing to shape high-latitude glaciations.

Original language	English
Pages (from-to)	7066-7074
Number of pages	9
Journal	Geophysical Research Letters
Volume	45
Issue number	14
DOIs	https://doi.org/10.1029/2018GL078751
Publication status	Published - 28 Jul 2018

Funding

We would like to thank M. Rogerson and M. F. Sanchez-Goni for their constructive reviews of an earlier version of our manuscript. The Integrated Ocean Drilling Program (IODP) is acknowledged for providing samples. Funding was received through the German Research Foundation (DFG; grant BA 3809/4 to Ba6 to R/6 to Röhl) and NWO-ALW grant (project number 865.10.001) to Lucas J. Lourens. All data used in this study are available on www. pangaea.de.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 14 Life Below Water

Keywords

European Ice Sheet dynamics
glacial climate variability
low-latitude forcing of high-latitude glaciations
marine-terrestrial feedback in the Euro-Mediterranean realm
Mediterranean Outflow variability

Access to Document

10.1029/2018GL078751

Monsoonal Forcing of European Ice‐Sheet Dynamics During the Late Quaternary - Kaboth‐Bahr - 2018 - Geophysical Research Letters - Wiley Online LibraryFinal published version, 57.3 KBLicence: Taverne

Cite this

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title = "Monsoonal Forcing of European Ice-Sheet Dynamics During the Late Quaternary",

abstract = "The dynamics of Northern Hemisphere ice sheets during Late Quaternary glacials have yet been dominantly examined from a Laurentide Ice Sheet perspective, which helped shaping the idea of moisture-starved glacials and small-scale ice volume variability. However, the waxing and waning of the European Ice Sheet (EIS) casts doubt on this perception. Understanding EIS dynamics under glacial boundary conditions is crucial because its meltwater pulses influence global climate by weakening deepwater formation in the North Atlantic Ocean. Here we show that the advection of subtropical water toward the continental margin of western Europe lead to enhanced moisture availability on the continent and fueled the growth of EIS lobes during glacials. This warm-water pooling was caused by monsoonally paced enhanced Mediterranean Outflow Water (MOW) entrainment that dragged subtropical surface waters toward the European margin. This mechanism presents a yet unrecognized marine-terrestrial pathway that allows low-latitude forcing to shape high-latitude glaciations.",

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AU - Eynaud, Frédérique

AU - Jiménez-Espejo, Francisco

AU - Röhl, Ursula

AU - Friedrich, Oliver

AU - Pross, Jörg

AU - Löwemark, Ludvig

AU - Lourens, Lucas J.

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N2 - The dynamics of Northern Hemisphere ice sheets during Late Quaternary glacials have yet been dominantly examined from a Laurentide Ice Sheet perspective, which helped shaping the idea of moisture-starved glacials and small-scale ice volume variability. However, the waxing and waning of the European Ice Sheet (EIS) casts doubt on this perception. Understanding EIS dynamics under glacial boundary conditions is crucial because its meltwater pulses influence global climate by weakening deepwater formation in the North Atlantic Ocean. Here we show that the advection of subtropical water toward the continental margin of western Europe lead to enhanced moisture availability on the continent and fueled the growth of EIS lobes during glacials. This warm-water pooling was caused by monsoonally paced enhanced Mediterranean Outflow Water (MOW) entrainment that dragged subtropical surface waters toward the European margin. This mechanism presents a yet unrecognized marine-terrestrial pathway that allows low-latitude forcing to shape high-latitude glaciations.

AB - The dynamics of Northern Hemisphere ice sheets during Late Quaternary glacials have yet been dominantly examined from a Laurentide Ice Sheet perspective, which helped shaping the idea of moisture-starved glacials and small-scale ice volume variability. However, the waxing and waning of the European Ice Sheet (EIS) casts doubt on this perception. Understanding EIS dynamics under glacial boundary conditions is crucial because its meltwater pulses influence global climate by weakening deepwater formation in the North Atlantic Ocean. Here we show that the advection of subtropical water toward the continental margin of western Europe lead to enhanced moisture availability on the continent and fueled the growth of EIS lobes during glacials. This warm-water pooling was caused by monsoonally paced enhanced Mediterranean Outflow Water (MOW) entrainment that dragged subtropical surface waters toward the European margin. This mechanism presents a yet unrecognized marine-terrestrial pathway that allows low-latitude forcing to shape high-latitude glaciations.

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KW - glacial climate variability

KW - low-latitude forcing of high-latitude glaciations

KW - marine-terrestrial feedback in the Euro-Mediterranean realm

KW - Mediterranean Outflow variability

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JO - Geophysical Research Letters

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ER -

Monsoonal Forcing of European Ice-Sheet Dynamics During the Late Quaternary

Abstract

Funding

UN SDGs

Keywords

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