Late Holocene stable isotope chronology and meltwater discharge event in Maxwell and Admiralty bays, King George Island, Antarctica
Two short gravity cores were retrieved to obtain palaeoclimatic information from Maxwell and Admiralty bays, King George Island, South Shetland Islands. AMS 14 C age dates, sediment properties (grain size, TOC and CaCO 3 ) and stable oxygen and carbon isotope compositions of benthiδ foraminifera ( G...
Published in: | Antarctic Science |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2001
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102001000256 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102001000256 |
id |
crcambridgeupr:10.1017/s0954102001000256 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102001000256 2024-03-03T08:37:06+00:00 Late Holocene stable isotope chronology and meltwater discharge event in Maxwell and Admiralty bays, King George Island, Antarctica Khim, Boo-Keun Yoon, Ho Il Kim, Yeadong Shin, Im Chul 2001 http://dx.doi.org/10.1017/s0954102001000256 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102001000256 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 13, issue 2, page 167-173 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2001 crcambridgeupr https://doi.org/10.1017/s0954102001000256 2024-02-08T08:26:14Z Two short gravity cores were retrieved to obtain palaeoclimatic information from Maxwell and Admiralty bays, King George Island, South Shetland Islands. AMS 14 C age dates, sediment properties (grain size, TOC and CaCO 3 ) and stable oxygen and carbon isotope compositions of benthiδ foraminifera ( Globocassidulina biora ) show downcore variations that characterize depositional conditions during the late Holocene. In particular, δ 18 O values of benthic foraminifera are lowest at approximately 2500 yr bp in both cores. Allowδ 18 O time-equivalent excursion in both cores is interpreted to reflect a distinct subglacial meltwater discharge intensified by warm climatic conditions. An increased proportion of fine-grained detritus and higher TOC in the cores at this level suggests that enhanced meltwater supply may have resulted in increased primary productivity. This meltwater discharge event provides evidence of climatic instability during the late Holocene at King George Island. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica King George Island South Shetland Islands Cambridge University Press King George Island South Shetland Islands Antarctic Science 13 2 167 173 |
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 Khim, Boo-Keun Yoon, Ho Il Kim, Yeadong Shin, Im Chul Late Holocene stable isotope chronology and meltwater discharge event in Maxwell and Admiralty bays, King George Island, Antarctica |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Two short gravity cores were retrieved to obtain palaeoclimatic information from Maxwell and Admiralty bays, King George Island, South Shetland Islands. AMS 14 C age dates, sediment properties (grain size, TOC and CaCO 3 ) and stable oxygen and carbon isotope compositions of benthiδ foraminifera ( Globocassidulina biora ) show downcore variations that characterize depositional conditions during the late Holocene. In particular, δ 18 O values of benthic foraminifera are lowest at approximately 2500 yr bp in both cores. Allowδ 18 O time-equivalent excursion in both cores is interpreted to reflect a distinct subglacial meltwater discharge intensified by warm climatic conditions. An increased proportion of fine-grained detritus and higher TOC in the cores at this level suggests that enhanced meltwater supply may have resulted in increased primary productivity. This meltwater discharge event provides evidence of climatic instability during the late Holocene at King George Island. |
format |
Article in Journal/Newspaper |
author |
Khim, Boo-Keun Yoon, Ho Il Kim, Yeadong Shin, Im Chul |
author_facet |
Khim, Boo-Keun Yoon, Ho Il Kim, Yeadong Shin, Im Chul |
author_sort |
Khim, Boo-Keun |
title |
Late Holocene stable isotope chronology and meltwater discharge event in Maxwell and Admiralty bays, King George Island, Antarctica |
title_short |
Late Holocene stable isotope chronology and meltwater discharge event in Maxwell and Admiralty bays, King George Island, Antarctica |
title_full |
Late Holocene stable isotope chronology and meltwater discharge event in Maxwell and Admiralty bays, King George Island, Antarctica |
title_fullStr |
Late Holocene stable isotope chronology and meltwater discharge event in Maxwell and Admiralty bays, King George Island, Antarctica |
title_full_unstemmed |
Late Holocene stable isotope chronology and meltwater discharge event in Maxwell and Admiralty bays, King George Island, Antarctica |
title_sort |
late holocene stable isotope chronology and meltwater discharge event in maxwell and admiralty bays, king george island, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2001 |
url |
http://dx.doi.org/10.1017/s0954102001000256 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102001000256 |
geographic |
King George Island South Shetland Islands |
geographic_facet |
King George Island South Shetland Islands |
genre |
Antarc* Antarctic Science Antarctica King George Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Science Antarctica King George Island South Shetland Islands |
op_source |
Antarctic Science volume 13, issue 2, page 167-173 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102001000256 |
container_title |
Antarctic Science |
container_volume |
13 |
container_issue |
2 |
container_start_page |
167 |
op_container_end_page |
173 |
_version_ |
1792497056836747264 |