Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula
The sensitivity of sea level to melting from polar ice sheets and glaciers during recent natural and anthropogenic climate fluctuations is poorly constrained beyond the period of direct observation by satellite. We have investigated glacial meltwater events during the Anthropocene by adapting the pi...
Published in: | Geochemistry, Geophysics, Geosystems |
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Online Access: | https://oceanrep.geomar.de/id/eprint/8726/ https://oceanrep.geomar.de/id/eprint/8726/1/Lu_etal_2010_G-cubed11.pdf https://doi.org/10.1029/2009GC002949 |
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ftoceanrep:oai:oceanrep.geomar.de:8726 2023-05-15T13:55:22+02:00 Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula Lu, Zunli Rickaby, Rosalind E. M. Wellner, Julia Georg, Bastian Charnley, Norman Anderson, John B. Hensen, Christian 2010 text https://oceanrep.geomar.de/id/eprint/8726/ https://oceanrep.geomar.de/id/eprint/8726/1/Lu_etal_2010_G-cubed11.pdf https://doi.org/10.1029/2009GC002949 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/8726/1/Lu_etal_2010_G-cubed11.pdf Lu, Z., Rickaby, R. E. M., Wellner, J., Georg, B., Charnley, N., Anderson, J. B. and Hensen, C. (2010) Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula. Open Access Geochemistry, Geophysics, Geosystems, 11 (6). Q06017. DOI 10.1029/2009GC002949 <https://doi.org/10.1029/2009GC002949>. doi:10.1029/2009GC002949 info:eu-repo/semantics/openAccess Article PeerReviewed 2010 ftoceanrep https://doi.org/10.1029/2009GC002949 2023-04-07T14:57:00Z The sensitivity of sea level to melting from polar ice sheets and glaciers during recent natural and anthropogenic climate fluctuations is poorly constrained beyond the period of direct observation by satellite. We have investigated glacial meltwater events during the Anthropocene by adapting the pioneering approach of modeling trends in d18O in the pore waters of deep‐sea cores, previously used to constrain the size of ice sheets during the Last Glacial Maximum. We show that during recent warm periods, meltwater from glacier retreat drains into the coastal fjords, leaving a signature of depleted d18O values and low Cl concentrations in the pore water profiles of rapidly accumulating sediments. Here we model such pore water profiles in a piston core to constrain the timing and magnitude of an ice sheet retreat event at Caley Glacier on the west Antarctic Peninsula, and the result is compared with local ice front movement. This approach of pore water modeling was then applied in another kasten core and tested by a series of sensitivity analyses. The results suggest that our approach may be applied in fjords of different sedimentary settings to reconstruct the glacier history and allow insight into the sensitivity of polar glaciers to abrupt warming events. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Antarctic Peninsula Geochemistry, Geophysics, Geosystems 11 6 n/a n/a |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The sensitivity of sea level to melting from polar ice sheets and glaciers during recent natural and anthropogenic climate fluctuations is poorly constrained beyond the period of direct observation by satellite. We have investigated glacial meltwater events during the Anthropocene by adapting the pioneering approach of modeling trends in d18O in the pore waters of deep‐sea cores, previously used to constrain the size of ice sheets during the Last Glacial Maximum. We show that during recent warm periods, meltwater from glacier retreat drains into the coastal fjords, leaving a signature of depleted d18O values and low Cl concentrations in the pore water profiles of rapidly accumulating sediments. Here we model such pore water profiles in a piston core to constrain the timing and magnitude of an ice sheet retreat event at Caley Glacier on the west Antarctic Peninsula, and the result is compared with local ice front movement. This approach of pore water modeling was then applied in another kasten core and tested by a series of sensitivity analyses. The results suggest that our approach may be applied in fjords of different sedimentary settings to reconstruct the glacier history and allow insight into the sensitivity of polar glaciers to abrupt warming events. |
format |
Article in Journal/Newspaper |
author |
Lu, Zunli Rickaby, Rosalind E. M. Wellner, Julia Georg, Bastian Charnley, Norman Anderson, John B. Hensen, Christian |
spellingShingle |
Lu, Zunli Rickaby, Rosalind E. M. Wellner, Julia Georg, Bastian Charnley, Norman Anderson, John B. Hensen, Christian Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula |
author_facet |
Lu, Zunli Rickaby, Rosalind E. M. Wellner, Julia Georg, Bastian Charnley, Norman Anderson, John B. Hensen, Christian |
author_sort |
Lu, Zunli |
title |
Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula |
title_short |
Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula |
title_full |
Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula |
title_fullStr |
Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula |
title_full_unstemmed |
Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula |
title_sort |
pore fluid modeling approach to identify recent meltwater signals on the west antarctic peninsula |
publisher |
AGU (American Geophysical Union) |
publishDate |
2010 |
url |
https://oceanrep.geomar.de/id/eprint/8726/ https://oceanrep.geomar.de/id/eprint/8726/1/Lu_etal_2010_G-cubed11.pdf https://doi.org/10.1029/2009GC002949 |
geographic |
Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
op_relation |
https://oceanrep.geomar.de/id/eprint/8726/1/Lu_etal_2010_G-cubed11.pdf Lu, Z., Rickaby, R. E. M., Wellner, J., Georg, B., Charnley, N., Anderson, J. B. and Hensen, C. (2010) Pore fluid modeling approach to identify recent meltwater signals on the west Antarctic Peninsula. Open Access Geochemistry, Geophysics, Geosystems, 11 (6). Q06017. DOI 10.1029/2009GC002949 <https://doi.org/10.1029/2009GC002949>. doi:10.1029/2009GC002949 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2009GC002949 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
11 |
container_issue |
6 |
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n/a |
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1766261974540222464 |