Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907)
Sea ice is a critical component in the Arctic and global climate system, yet little is known about its extent and variability during past warm intervals, such as the Pliocene (5.33–2.58Ma). Here, we present the first multi-proxy (IP25, sterols, alkenones, palynology) sea ice reconstructions for the...
Published in: | Earth and Planetary Science Letters |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
ELSEVIER SCIENCE BV
2018
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/45714/ https://hdl.handle.net/10013/epic.51817 |
id |
ftawi:oai:epic.awi.de:45714 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:45714 2023-05-15T15:08:26+02:00 Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907) Clotten, Caroline Stein, Rüdiger Fahl, Kirsten De Schepper, Stijn 2018 https://epic.awi.de/id/eprint/45714/ https://hdl.handle.net/10013/epic.51817 unknown ELSEVIER SCIENCE BV Clotten, C. , Stein, R. orcid:0000-0002-4453-9564 , Fahl, K. orcid:0000-0001-9317-4656 and De Schepper, S. (2018) Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907) , Earth and Planetary Science Letters, 481 , pp. 61-72 . doi:10.1016/j.epsl.2017.10.011 <https://doi.org/10.1016/j.epsl.2017.10.011> , hdl:10013/epic.51817 EPIC3Earth and Planetary Science Letters, ELSEVIER SCIENCE BV, 481, pp. 61-72, ISSN: 0012-821X Article isiRev 2018 ftawi https://doi.org/10.1016/j.epsl.2017.10.011 2021-12-24T15:43:23Z Sea ice is a critical component in the Arctic and global climate system, yet little is known about its extent and variability during past warm intervals, such as the Pliocene (5.33–2.58Ma). Here, we present the first multi-proxy (IP25, sterols, alkenones, palynology) sea ice reconstructions for the Late Pliocene Iceland Sea (ODP Site 907). Our interpretation of a seasonal sea ice cover with occasional ice-free intervals between 3.50–3.00Ma is supported by reconstructed alkenone-based summer sea surface temperatures. As evidenced from brassicasterol and dinosterol, primary productivity was low between 3.50 and 3.00Ma and the site experienced generally oligotrophic conditions. The East Greenland Current (and East Icelandic Current) may have transported sea ice into the Iceland Sea and/or brought cooler and fresher waters favoring local sea ice formation. Between 3.00 and 2.40Ma, the Iceland Sea is mainly sea ice-free, but seasonal sea ice occurred between 2.81 and 2.74Ma. Sea ice extending into the Iceland Sea at this time may have acted as a positive feedback for the build-up of the Greenland Ice Sheet (GIS), which underwent a major expansion ∼2.75Ma. Thereafter, most likely a stable sea ice edge developed close to Greenland, possibly changing together with the expansion and retreat of the GIS and affecting the productivity in the Iceland Sea. Article in Journal/Newspaper Arctic East Greenland east greenland current Greenland Ice Sheet Iceland Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Greenland Earth and Planetary Science Letters 481 61 72 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Sea ice is a critical component in the Arctic and global climate system, yet little is known about its extent and variability during past warm intervals, such as the Pliocene (5.33–2.58Ma). Here, we present the first multi-proxy (IP25, sterols, alkenones, palynology) sea ice reconstructions for the Late Pliocene Iceland Sea (ODP Site 907). Our interpretation of a seasonal sea ice cover with occasional ice-free intervals between 3.50–3.00Ma is supported by reconstructed alkenone-based summer sea surface temperatures. As evidenced from brassicasterol and dinosterol, primary productivity was low between 3.50 and 3.00Ma and the site experienced generally oligotrophic conditions. The East Greenland Current (and East Icelandic Current) may have transported sea ice into the Iceland Sea and/or brought cooler and fresher waters favoring local sea ice formation. Between 3.00 and 2.40Ma, the Iceland Sea is mainly sea ice-free, but seasonal sea ice occurred between 2.81 and 2.74Ma. Sea ice extending into the Iceland Sea at this time may have acted as a positive feedback for the build-up of the Greenland Ice Sheet (GIS), which underwent a major expansion ∼2.75Ma. Thereafter, most likely a stable sea ice edge developed close to Greenland, possibly changing together with the expansion and retreat of the GIS and affecting the productivity in the Iceland Sea. |
format |
Article in Journal/Newspaper |
author |
Clotten, Caroline Stein, Rüdiger Fahl, Kirsten De Schepper, Stijn |
spellingShingle |
Clotten, Caroline Stein, Rüdiger Fahl, Kirsten De Schepper, Stijn Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907) |
author_facet |
Clotten, Caroline Stein, Rüdiger Fahl, Kirsten De Schepper, Stijn |
author_sort |
Clotten, Caroline |
title |
Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907) |
title_short |
Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907) |
title_full |
Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907) |
title_fullStr |
Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907) |
title_full_unstemmed |
Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907) |
title_sort |
seasonal sea ice cover during the warm pliocene: evidence from the iceland sea (odp site 907) |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/45714/ https://hdl.handle.net/10013/epic.51817 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic East Greenland east greenland current Greenland Ice Sheet Iceland Sea ice |
genre_facet |
Arctic East Greenland east greenland current Greenland Ice Sheet Iceland Sea ice |
op_source |
EPIC3Earth and Planetary Science Letters, ELSEVIER SCIENCE BV, 481, pp. 61-72, ISSN: 0012-821X |
op_relation |
Clotten, C. , Stein, R. orcid:0000-0002-4453-9564 , Fahl, K. orcid:0000-0001-9317-4656 and De Schepper, S. (2018) Seasonal sea ice cover during the warm Pliocene: Evidence from the Iceland Sea (ODP Site 907) , Earth and Planetary Science Letters, 481 , pp. 61-72 . doi:10.1016/j.epsl.2017.10.011 <https://doi.org/10.1016/j.epsl.2017.10.011> , hdl:10013/epic.51817 |
op_doi |
https://doi.org/10.1016/j.epsl.2017.10.011 |
container_title |
Earth and Planetary Science Letters |
container_volume |
481 |
container_start_page |
61 |
op_container_end_page |
72 |
_version_ |
1766339799958945792 |