Seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at Gerlache Strait, Antarctic Peninsula
Abstract Sediment trap arrays were deployed in Brialmont Cove and Andvord Bay, eastern Gerlache Strait, from December 2001–March 2003. The recovered sediments (representing instantaneous deposition from the viewpoint of luminescence dating) encompass all the annual and local glaciomarine depositiona...
Published in: | Antarctic Science |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2009
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102009990186 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102009990186 |
id |
crcambridgeupr:10.1017/s0954102009990186 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102009990186 2024-03-03T08:38:11+00:00 Seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at Gerlache Strait, Antarctic Peninsula Berger, Glenn W. Ante, Sara Domack, Eugene W. 2009 http://dx.doi.org/10.1017/s0954102009990186 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102009990186 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 21, issue 5, page 483-499 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2009 crcambridgeupr https://doi.org/10.1017/s0954102009990186 2024-02-08T08:46:24Z Abstract Sediment trap arrays were deployed in Brialmont Cove and Andvord Bay, eastern Gerlache Strait, from December 2001–March 2003. The recovered sediments (representing instantaneous deposition from the viewpoint of luminescence dating) encompass all the annual and local glaciomarine depositional processes. Magnetic susceptibility profiles were used to infer seasonality in the trap cores, and thus to select subsamples for luminescence measurements. Multi-aliquot infrared stimulated luminescence (IRSL) apparent ages were used to assess the effectiveness of ‘clock zeroing’ (by daylight) of light sensitive luminescence within fine silt polymineral samples from each trap depth. IRSL apparent ages for 24 samples indicate that the largest age-depth differences occur with the autumn season samples at both trap sites, suggesting a previously unrecognized and regional (within the Gerlache Strait) change in depositional controls in the autumn compared to other seasons. The apparent ages also indicate some differences between the fjords, and a more complex oceanographic regime at Andvord Bay than at Brialmont Cove. Dry-mass sediment fluxes varied from 0.4 to 0.7 g cm -2 yr -1 , with the largest flux at Brialmont Cove (∼0.7 g cm -2 yr -1 ) occurring in the bottom trap, whereas at Andvord Bay, the largest flux (∼0.6 g cm -2 yr -1 ) occurred in the middle trap (∼45 m above seafloor). Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Cambridge University Press Antarctic Antarctic Peninsula Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Gerlache Strait ENVELOPE(-62.333,-62.333,-64.500,-64.500) Andvord ENVELOPE(-62.616,-62.616,-64.833,-64.833) Andvord Bay ENVELOPE(-62.650,-62.650,-64.833,-64.833) Brialmont ENVELOPE(-61.000,-61.000,-64.267,-64.267) Brialmont Cove ENVELOPE(-61.000,-61.000,-64.267,-64.267) Antarctic Science 21 5 483 499 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Berger, Glenn W. Ante, Sara Domack, Eugene W. Seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at Gerlache Strait, Antarctic Peninsula |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Sediment trap arrays were deployed in Brialmont Cove and Andvord Bay, eastern Gerlache Strait, from December 2001–March 2003. The recovered sediments (representing instantaneous deposition from the viewpoint of luminescence dating) encompass all the annual and local glaciomarine depositional processes. Magnetic susceptibility profiles were used to infer seasonality in the trap cores, and thus to select subsamples for luminescence measurements. Multi-aliquot infrared stimulated luminescence (IRSL) apparent ages were used to assess the effectiveness of ‘clock zeroing’ (by daylight) of light sensitive luminescence within fine silt polymineral samples from each trap depth. IRSL apparent ages for 24 samples indicate that the largest age-depth differences occur with the autumn season samples at both trap sites, suggesting a previously unrecognized and regional (within the Gerlache Strait) change in depositional controls in the autumn compared to other seasons. The apparent ages also indicate some differences between the fjords, and a more complex oceanographic regime at Andvord Bay than at Brialmont Cove. Dry-mass sediment fluxes varied from 0.4 to 0.7 g cm -2 yr -1 , with the largest flux at Brialmont Cove (∼0.7 g cm -2 yr -1 ) occurring in the bottom trap, whereas at Andvord Bay, the largest flux (∼0.6 g cm -2 yr -1 ) occurred in the middle trap (∼45 m above seafloor). |
format |
Article in Journal/Newspaper |
author |
Berger, Glenn W. Ante, Sara Domack, Eugene W. |
author_facet |
Berger, Glenn W. Ante, Sara Domack, Eugene W. |
author_sort |
Berger, Glenn W. |
title |
Seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at Gerlache Strait, Antarctic Peninsula |
title_short |
Seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at Gerlache Strait, Antarctic Peninsula |
title_full |
Seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at Gerlache Strait, Antarctic Peninsula |
title_fullStr |
Seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at Gerlache Strait, Antarctic Peninsula |
title_full_unstemmed |
Seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at Gerlache Strait, Antarctic Peninsula |
title_sort |
seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at gerlache strait, antarctic peninsula |
publisher |
Cambridge University Press (CUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1017/s0954102009990186 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102009990186 |
long_lat |
ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-62.333,-62.333,-64.500,-64.500) ENVELOPE(-62.616,-62.616,-64.833,-64.833) ENVELOPE(-62.650,-62.650,-64.833,-64.833) ENVELOPE(-61.000,-61.000,-64.267,-64.267) ENVELOPE(-61.000,-61.000,-64.267,-64.267) |
geographic |
Antarctic Antarctic Peninsula Gerlache Gerlache Strait Andvord Andvord Bay Brialmont Brialmont Cove |
geographic_facet |
Antarctic Antarctic Peninsula Gerlache Gerlache Strait Andvord Andvord Bay Brialmont Brialmont Cove |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science |
op_source |
Antarctic Science volume 21, issue 5, page 483-499 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102009990186 |
container_title |
Antarctic Science |
container_volume |
21 |
container_issue |
5 |
container_start_page |
483 |
op_container_end_page |
499 |
_version_ |
1792505334653255680 |