• norsk
    • English
  • norsk 
    • norsk
    • English
  • Logg inn
Vis innførsel 
  •   Hjem
  • University of Bergen Library
  • Registrations from Cristin
  • Vis innførsel
  •   Hjem
  • University of Bergen Library
  • Registrations from Cristin
  • Vis innførsel
JavaScript is disabled for your browser. Some features of this site may not work without it.

Eurasian Ice Sheet collapse was a major source of Meltwater Pulse 1A 14,600 years ago

Brendryen, Jo; Haflidason, Haflidi; Yokoyama, Yusuke; Haaga, Kristian Agasøster; Hannisdal, Bjarte
Journal article, Peer reviewed
Accepted version
Thumbnail
Åpne
Accepted Version (10.66Mb)
Permanent lenke
https://hdl.handle.net/11250/2755925
Utgivelsesdato
2020
Metadata
Vis full innførsel
Samlinger
  • Department of Earth Science [861]
  • Registrations from Cristin [5511]
Originalversjon
Nature Geoscience. 2020, 13, 363–368   https://doi.org/10.1038/s41561-020-0567-4
Sammendrag
Rapid sea-level rise caused by the collapse of large ice sheets is a threat to human societies. In the last deglacial period, the rate of global sea-level rise peaked at more than 4 cm yr−1 during Meltwater Pulse 1A, which coincided with the Bølling warming event some 14,650 years ago. However, the sources of the meltwater have proven elusive, and the contribution from Eurasian ice sheets has been considered negligible. Here, we present a regional carbon-14 calibration curve for the Norwegian Sea and recalibrate marine 14C dates linked to the Eurasian Ice Sheet retreat. We find that marine-based sectors of the Eurasian Ice Sheet collapsed at the Bølling transition and lost an ice volume of 4.5–7.9 m sea-level equivalents (SLE) over 500 years. During peak melting, 3.3–6.7 m SLE of ice was lost, potentially explaining up to half of Meltwater Pulse 1A. A mean meltwater flux of 0.2 Sv over 300 years was injected into the Norwegian Sea and the Arctic Ocean at a time when proxy evidence suggests vigorous Atlantic meridional overturning circulation. Our reconstruction shows that massive marine-based ice sheets can collapse in as little as 300–500 years.
Utgiver
Nature
Tidsskrift
Nature Geoscience
Opphavsrett
Copyright 2020 The Authors

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit
 

 

Bla i

Hele arkivetDelarkiv og samlingerUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifterDenne samlingenUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifter

Min side

Logg inn

Statistikk

Besøksstatistikk

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit