A 100-year long record of alkenone-derived SST changes by Southeast Greenland
International audience 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 f...
Published in: | Continental Shelf Research |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2013
|
Subjects: | |
Online Access: | https://hal.science/hal-03207455 https://hal.science/hal-03207455/document https://hal.science/hal-03207455/file/21754.pdf https://doi.org/10.1016/j.csr.2013.10.003 |
id |
ftuniversailles:oai:HAL:hal-03207455v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment 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 |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience 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. |
author2 |
Geological Survey of Denmark and Greenland (GEUS) Paléocéanographie (PALEOCEAN) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Woods Hole Oceanographic Institution (WHOI) Department of Geological Sciences Stanford (GS) Stanford EARTH Stanford University-Stanford University University of Oregon Eugene Durham University NAIV project supported by LEFE program of the Institut National des Sciences de l'Univers (INSU) of the Centre national de la Recherche Scientifique |
format |
Article in Journal/Newspaper |
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 |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-03207455 https://hal.science/hal-03207455/document https://hal.science/hal-03207455/file/21754.pdf https://doi.org/10.1016/j.csr.2013.10.003 |
genre |
East Greenland east greenland current glacier Greenland Sermilik |
genre_facet |
East Greenland east greenland current glacier Greenland Sermilik |
op_source |
ISSN: 0278-4343 EISSN: 1873-6955 Continental Shelf Research https://hal.science/hal-03207455 Continental Shelf Research, 2013, 71, pp.45-51. ⟨10.1016/j.csr.2013.10.003⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.csr.2013.10.003 hal-03207455 https://hal.science/hal-03207455 https://hal.science/hal-03207455/document https://hal.science/hal-03207455/file/21754.pdf doi:10.1016/j.csr.2013.10.003 WOS: WOS:000329149500005 |
op_rights |
info:eu-repo/semantics/OpenAccess |
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_ |
1797582029461651456 |
spelling |
ftuniversailles:oai:HAL:hal-03207455v1 2024-04-28T08:17:26+00:00 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 Geological Survey of Denmark and Greenland (GEUS) Paléocéanographie (PALEOCEAN) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Woods Hole Oceanographic Institution (WHOI) Department of Geological Sciences Stanford (GS) Stanford EARTH Stanford University-Stanford University University of Oregon Eugene Durham University NAIV project supported by LEFE program of the Institut National des Sciences de l'Univers (INSU) of the Centre national de la Recherche Scientifique 2013-12 https://hal.science/hal-03207455 https://hal.science/hal-03207455/document https://hal.science/hal-03207455/file/21754.pdf https://doi.org/10.1016/j.csr.2013.10.003 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.csr.2013.10.003 hal-03207455 https://hal.science/hal-03207455 https://hal.science/hal-03207455/document https://hal.science/hal-03207455/file/21754.pdf doi:10.1016/j.csr.2013.10.003 WOS: WOS:000329149500005 info:eu-repo/semantics/OpenAccess ISSN: 0278-4343 EISSN: 1873-6955 Continental Shelf Research https://hal.science/hal-03207455 Continental Shelf Research, 2013, 71, pp.45-51. ⟨10.1016/j.csr.2013.10.003⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2013 ftuniversailles https://doi.org/10.1016/j.csr.2013.10.003 2024-04-04T17:33:38Z International audience 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. Article in Journal/Newspaper East Greenland east greenland current glacier Greenland Sermilik Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Continental Shelf Research 71 45 51 |