Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica
During the last 50 years, the Antarctic Peninsula has experienced rapid warming with associated retreat of 87% of marine and tidewater glacier fronts. Accelerated glacial retreat and iceberg calving may have a significant impact on the freshwater and nutrient supply to the phytoplankton communities...
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
2008
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/7517/ https://doi.org/10.1029/2007PA001576 https://orca.cardiff.ac.uk/id/eprint/7517/1/Hendry%202008.pdf |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:7517 2023-05-15T13:46:03+02:00 Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica Hendry, Katharine Rosemary Rickaby, Rosalind E. M. 2008 application/pdf https://orca.cardiff.ac.uk/id/eprint/7517/ https://doi.org/10.1029/2007PA001576 https://orca.cardiff.ac.uk/id/eprint/7517/1/Hendry%202008.pdf en eng American Geophysical Union https://orca.cardiff.ac.uk/id/eprint/7517/1/Hendry%202008.pdf Hendry, Katharine Rosemary and Rickaby, Rosalind E. M. 2008. Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica. Paleoceanography 23 (2) , PA2218. 10.1029/2007PA001576 https://doi.org/10.1029/2007PA001576 file https://orca.cardiff.ac.uk/7517/1/Hendry%202008.pdf doi:10.1029/2007PA001576 Article PeerReviewed 2008 ftunivcardiff https://doi.org/10.1029/2007PA001576 2022-09-25T20:16:07Z During the last 50 years, the Antarctic Peninsula has experienced rapid warming with associated retreat of 87% of marine and tidewater glacier fronts. Accelerated glacial retreat and iceberg calving may have a significant impact on the freshwater and nutrient supply to the phytoplankton communities of the highly productive coastal regions. However, commonly used biogenic carbonate proxies for nutrient and salinity conditions are not preserved in sediments from coastal Antarctica. Here we describe a method for the measurement of zinc to silicon ratios in diatom opal, (Zn/Si)opal, which is a potential archive in Antarctic marine sediments. A core top calibration from the West Antarctic Peninsula shows (Zn/Si)opal is a proxy for mixed layer salinity. We present down-core (Zn/Si)opal paleosalinity records from two rapidly accumulating sites taken from nearshore environments off the West Antarctic Peninsula which show an increase in meltwater input in recent decades. Our records show that the recent melting in this region is unprecedented for over 120 years. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Iceberg* Tidewater Cardiff University: ORCA (Online Research @ Cardiff) Antarctic The Antarctic Antarctic Peninsula Paleoceanography 23 2 n/a n/a |
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Open Polar |
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Cardiff University: ORCA (Online Research @ Cardiff) |
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ftunivcardiff |
language |
English |
description |
During the last 50 years, the Antarctic Peninsula has experienced rapid warming with associated retreat of 87% of marine and tidewater glacier fronts. Accelerated glacial retreat and iceberg calving may have a significant impact on the freshwater and nutrient supply to the phytoplankton communities of the highly productive coastal regions. However, commonly used biogenic carbonate proxies for nutrient and salinity conditions are not preserved in sediments from coastal Antarctica. Here we describe a method for the measurement of zinc to silicon ratios in diatom opal, (Zn/Si)opal, which is a potential archive in Antarctic marine sediments. A core top calibration from the West Antarctic Peninsula shows (Zn/Si)opal is a proxy for mixed layer salinity. We present down-core (Zn/Si)opal paleosalinity records from two rapidly accumulating sites taken from nearshore environments off the West Antarctic Peninsula which show an increase in meltwater input in recent decades. Our records show that the recent melting in this region is unprecedented for over 120 years. |
format |
Article in Journal/Newspaper |
author |
Hendry, Katharine Rosemary Rickaby, Rosalind E. M. |
spellingShingle |
Hendry, Katharine Rosemary Rickaby, Rosalind E. M. Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica |
author_facet |
Hendry, Katharine Rosemary Rickaby, Rosalind E. M. |
author_sort |
Hendry, Katharine Rosemary |
title |
Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica |
title_short |
Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica |
title_full |
Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica |
title_fullStr |
Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica |
title_full_unstemmed |
Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica |
title_sort |
opal (zn/si) ratios as a nearshore geochemical proxy in coastal antarctica |
publisher |
American Geophysical Union |
publishDate |
2008 |
url |
https://orca.cardiff.ac.uk/id/eprint/7517/ https://doi.org/10.1029/2007PA001576 https://orca.cardiff.ac.uk/id/eprint/7517/1/Hendry%202008.pdf |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Iceberg* Tidewater |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Iceberg* Tidewater |
op_relation |
https://orca.cardiff.ac.uk/id/eprint/7517/1/Hendry%202008.pdf Hendry, Katharine Rosemary and Rickaby, Rosalind E. M. 2008. Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica. Paleoceanography 23 (2) , PA2218. 10.1029/2007PA001576 https://doi.org/10.1029/2007PA001576 file https://orca.cardiff.ac.uk/7517/1/Hendry%202008.pdf doi:10.1029/2007PA001576 |
op_doi |
https://doi.org/10.1029/2007PA001576 |
container_title |
Paleoceanography |
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23 |
container_issue |
2 |
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_version_ |
1766235412675690496 |