A 100-year long record of alkenone-derived SST changes by Southeast Greenland
Sediment core ER07 from Sermilik Fjord by Helheim Glacier in Southeast Greenland was analysedfor alkenones to document sea surface temperature (SST) changes over the past 100 years. Thealkenone SST values, ranging from 8 to 12°C, contrasts with colder values (0-4°C) obtained fromrecent hydrographic...
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/37969 2023-05-15T16:03:49+02:00 A 100-year long record of alkenone-derived SST changes by Southeast Greenland ANDRESEN, Camilla SICRE, Marie-Alexandrine STRANEO, Fiammetta SUTHERLAND, David SCHMITH, Torben HVID RIBERGAARD, Mads KUIJPERS, Antoon LLOYD, Jerry 2013-12 https://oskar-bordeaux.fr/handle/20.500.12278/37969 https://doi.org/10.1016/j.csr.2013.10.003 en eng Elsevier 0278-4343 https://oskar-bordeaux.fr/handle/20.500.12278/37969 doi:10.1016/j.csr.2013.10.003 Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Interfaces continentales environnement Article de revue 2013 ftoskarbordeaux https://doi.org/10.1016/j.csr.2013.10.003 2021-05-11T22:29:05Z Sediment core ER07 from Sermilik Fjord by Helheim Glacier in Southeast Greenland was analysedfor alkenones to document sea surface temperature (SST) changes over the past 100 years. Thealkenone SST values, ranging from 8 to 12°C, contrasts with colder values (0-4°C) obtained fromrecent hydrographic surveys inside the fjord. We suggest that advection of allochtonous alkenonesproduced in the warm Irminger Current waters circulating on the shelf likely accounts for thisdifference. The temperature range of the alkenone-derived record is similar to in situ observationsof 8-11°C on the shelf just outside Sermilik Fjord, and its variability over the past 100 yearsresembles the constructed variability over the shelf using remote instrumental data. This suggeststhat oceanographic changes on the adjacent shelf are linked to regional changes of the IrmingerCurrent and the East Greenland Current. The subsurface water heat content has previously beensuggested as an important control on Greenland outlet glacier stability and underlined by an episodeof warm subsurface waters ~ 1940 concurrent with markedly increased calving and retreat ofHelheim Glacier. Our results therefore suggest that alkenone-derived SST time series from highsedimentation rate glacial fjords may provide a new approach for reconstruction of past changes ofshelf water properties and variability around Greenland. Other/Unknown Material East Greenland east greenland current glacier Greenland Sermilik OSKAR Bordeaux (Open Science Knowledge ARchive) Greenland Continental Shelf Research 71 45 51 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Interfaces continentales environnement |
spellingShingle |
Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Interfaces continentales environnement ANDRESEN, Camilla SICRE, Marie-Alexandrine STRANEO, Fiammetta SUTHERLAND, David SCHMITH, Torben HVID RIBERGAARD, Mads KUIJPERS, Antoon LLOYD, Jerry A 100-year long record of alkenone-derived SST changes by Southeast Greenland |
topic_facet |
Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Interfaces continentales environnement |
description |
Sediment core ER07 from Sermilik Fjord by Helheim Glacier in Southeast Greenland was analysedfor alkenones to document sea surface temperature (SST) changes over the past 100 years. Thealkenone SST values, ranging from 8 to 12°C, contrasts with colder values (0-4°C) obtained fromrecent hydrographic surveys inside the fjord. We suggest that advection of allochtonous alkenonesproduced in the warm Irminger Current waters circulating on the shelf likely accounts for thisdifference. The temperature range of the alkenone-derived record is similar to in situ observationsof 8-11°C on the shelf just outside Sermilik Fjord, and its variability over the past 100 yearsresembles the constructed variability over the shelf using remote instrumental data. This suggeststhat oceanographic changes on the adjacent shelf are linked to regional changes of the IrmingerCurrent and the East Greenland Current. The subsurface water heat content has previously beensuggested as an important control on Greenland outlet glacier stability and underlined by an episodeof warm subsurface waters ~ 1940 concurrent with markedly increased calving and retreat ofHelheim Glacier. Our results therefore suggest that alkenone-derived SST time series from highsedimentation rate glacial fjords may provide a new approach for reconstruction of past changes ofshelf water properties and variability around Greenland. |
format |
Other/Unknown Material |
author |
ANDRESEN, Camilla SICRE, Marie-Alexandrine STRANEO, Fiammetta SUTHERLAND, David SCHMITH, Torben HVID RIBERGAARD, Mads KUIJPERS, Antoon LLOYD, Jerry |
author_facet |
ANDRESEN, Camilla SICRE, Marie-Alexandrine STRANEO, Fiammetta SUTHERLAND, David SCHMITH, Torben HVID RIBERGAARD, Mads KUIJPERS, Antoon LLOYD, Jerry |
author_sort |
ANDRESEN, Camilla |
title |
A 100-year long record of alkenone-derived SST changes by Southeast Greenland |
title_short |
A 100-year long record of alkenone-derived SST changes by Southeast Greenland |
title_full |
A 100-year long record of alkenone-derived SST changes by Southeast Greenland |
title_fullStr |
A 100-year long record of alkenone-derived SST changes by Southeast Greenland |
title_full_unstemmed |
A 100-year long record of alkenone-derived SST changes by Southeast Greenland |
title_sort |
100-year long record of alkenone-derived sst changes by southeast greenland |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/37969 https://doi.org/10.1016/j.csr.2013.10.003 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland east greenland current glacier Greenland Sermilik |
genre_facet |
East Greenland east greenland current glacier Greenland Sermilik |
op_relation |
0278-4343 https://oskar-bordeaux.fr/handle/20.500.12278/37969 doi:10.1016/j.csr.2013.10.003 |
op_doi |
https://doi.org/10.1016/j.csr.2013.10.003 |
container_title |
Continental Shelf Research |
container_volume |
71 |
container_start_page |
45 |
op_container_end_page |
51 |
_version_ |
1766399505518821376 |