Chronostratigraphy of the Larsen blue-ice area in northern Victoria Land, East Antarctica, and its implications for paleoclimate
In blue-ice areas (BIAs), deep ice is directly exposed at the surface, allowing for the cost-effective collection of large-sized old-ice samples. However, chronostratigraphic studies on blue-ice areas are challenging owing to fold and fault structures. Here, we report on a surface transect of ice wi...
Published in: | The Cryosphere |
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2022
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Online Access: | https://doi.org/10.5194/tc-16-2301-2022 https://tc.copernicus.org/articles/16/2301/2022/ |
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ftcopernicus:oai:publications.copernicus.org:tc97798 2023-05-15T14:02:18+02:00 Chronostratigraphy of the Larsen blue-ice area in northern Victoria Land, East Antarctica, and its implications for paleoclimate Lee, Giyoon Ahn, Jinho Ju, Hyeontae Ritterbusch, Florian Oyabu, Ikumi Buizert, Christo Kim, Songyi Moon, Jangil Ghosh, Sambit Kawamura, Kenji Lu, Zheng-Tian Hong, Sangbum Han, Chang Hee Hur, Soon Do Jiang, Wei Yang, Guo-Min 2022-06-15 application/pdf https://doi.org/10.5194/tc-16-2301-2022 https://tc.copernicus.org/articles/16/2301/2022/ eng eng doi:10.5194/tc-16-2301-2022 https://tc.copernicus.org/articles/16/2301/2022/ eISSN: 1994-0424 Text 2022 ftcopernicus https://doi.org/10.5194/tc-16-2301-2022 2022-06-20T16:22:42Z In blue-ice areas (BIAs), deep ice is directly exposed at the surface, allowing for the cost-effective collection of large-sized old-ice samples. However, chronostratigraphic studies on blue-ice areas are challenging owing to fold and fault structures. Here, we report on a surface transect of ice with an undisturbed horizontal stratigraphy from the Larsen BIA, northern Victoria Land, East Antarctica. Ice layers defined by dust bands and ground-penetrating radar (GPR) surveys indicate a monotonic increase in age along the ice flow direction on the downstream side, while the upstream ice exhibits a potential repetition of ages on scales of tens of meters, which result from a complicated fold structure. Stable water isotopes ( δ 18 O ice and δ 2 H ice ) and components of the occluded air (i.e., CO 2 , N 2 O, CH 4 , δ 15 N–N 2 , δ 18 O atm ( = δ 18 O-O 2 ), δ <math xmlns="http://www.w3.org/1998/Math/MathML" id="M15" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msub><mi mathvariant="normal">O</mi><mn mathvariant="normal">2</mn></msub><mo>/</mo><msub><mi mathvariant="normal">N</mi><mn mathvariant="normal">2</mn></msub></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="34pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="b1374199d4ad746bc8cf74082403b011"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-16-2301-2022-ie00001.svg" width="34pt" height="14pt" src="tc-16-2301-2022-ie00001.png"/></svg:svg> , δ <math xmlns="http://www.w3.org/1998/Math/MathML" id="M17" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><mi mathvariant="normal">Ar</mi><mo>/</mo><msub><mi mathvariant="normal">N</mi><mn mathvariant="normal">2</mn></msub></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="32pt" ... Text Antarc* Antarctica East Antarctica Victoria Land Copernicus Publications: E-Journals Bia ENVELOPE(22.891,22.891,70.317,70.317) East Antarctica Victoria Land The Cryosphere 16 6 2301 2324 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
In blue-ice areas (BIAs), deep ice is directly exposed at the surface, allowing for the cost-effective collection of large-sized old-ice samples. However, chronostratigraphic studies on blue-ice areas are challenging owing to fold and fault structures. Here, we report on a surface transect of ice with an undisturbed horizontal stratigraphy from the Larsen BIA, northern Victoria Land, East Antarctica. Ice layers defined by dust bands and ground-penetrating radar (GPR) surveys indicate a monotonic increase in age along the ice flow direction on the downstream side, while the upstream ice exhibits a potential repetition of ages on scales of tens of meters, which result from a complicated fold structure. Stable water isotopes ( δ 18 O ice and δ 2 H ice ) and components of the occluded air (i.e., CO 2 , N 2 O, CH 4 , δ 15 N–N 2 , δ 18 O atm ( = δ 18 O-O 2 ), δ <math xmlns="http://www.w3.org/1998/Math/MathML" id="M15" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msub><mi mathvariant="normal">O</mi><mn mathvariant="normal">2</mn></msub><mo>/</mo><msub><mi mathvariant="normal">N</mi><mn mathvariant="normal">2</mn></msub></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="34pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="b1374199d4ad746bc8cf74082403b011"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-16-2301-2022-ie00001.svg" width="34pt" height="14pt" src="tc-16-2301-2022-ie00001.png"/></svg:svg> , δ <math xmlns="http://www.w3.org/1998/Math/MathML" id="M17" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><mi mathvariant="normal">Ar</mi><mo>/</mo><msub><mi mathvariant="normal">N</mi><mn mathvariant="normal">2</mn></msub></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="32pt" ... |
format |
Text |
author |
Lee, Giyoon Ahn, Jinho Ju, Hyeontae Ritterbusch, Florian Oyabu, Ikumi Buizert, Christo Kim, Songyi Moon, Jangil Ghosh, Sambit Kawamura, Kenji Lu, Zheng-Tian Hong, Sangbum Han, Chang Hee Hur, Soon Do Jiang, Wei Yang, Guo-Min |
spellingShingle |
Lee, Giyoon Ahn, Jinho Ju, Hyeontae Ritterbusch, Florian Oyabu, Ikumi Buizert, Christo Kim, Songyi Moon, Jangil Ghosh, Sambit Kawamura, Kenji Lu, Zheng-Tian Hong, Sangbum Han, Chang Hee Hur, Soon Do Jiang, Wei Yang, Guo-Min Chronostratigraphy of the Larsen blue-ice area in northern Victoria Land, East Antarctica, and its implications for paleoclimate |
author_facet |
Lee, Giyoon Ahn, Jinho Ju, Hyeontae Ritterbusch, Florian Oyabu, Ikumi Buizert, Christo Kim, Songyi Moon, Jangil Ghosh, Sambit Kawamura, Kenji Lu, Zheng-Tian Hong, Sangbum Han, Chang Hee Hur, Soon Do Jiang, Wei Yang, Guo-Min |
author_sort |
Lee, Giyoon |
title |
Chronostratigraphy of the Larsen blue-ice area in northern Victoria Land, East Antarctica, and its implications for paleoclimate |
title_short |
Chronostratigraphy of the Larsen blue-ice area in northern Victoria Land, East Antarctica, and its implications for paleoclimate |
title_full |
Chronostratigraphy of the Larsen blue-ice area in northern Victoria Land, East Antarctica, and its implications for paleoclimate |
title_fullStr |
Chronostratigraphy of the Larsen blue-ice area in northern Victoria Land, East Antarctica, and its implications for paleoclimate |
title_full_unstemmed |
Chronostratigraphy of the Larsen blue-ice area in northern Victoria Land, East Antarctica, and its implications for paleoclimate |
title_sort |
chronostratigraphy of the larsen blue-ice area in northern victoria land, east antarctica, and its implications for paleoclimate |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-2301-2022 https://tc.copernicus.org/articles/16/2301/2022/ |
long_lat |
ENVELOPE(22.891,22.891,70.317,70.317) |
geographic |
Bia East Antarctica Victoria Land |
geographic_facet |
Bia East Antarctica Victoria Land |
genre |
Antarc* Antarctica East Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica East Antarctica Victoria Land |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-16-2301-2022 https://tc.copernicus.org/articles/16/2301/2022/ |
op_doi |
https://doi.org/10.5194/tc-16-2301-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
6 |
container_start_page |
2301 |
op_container_end_page |
2324 |
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1766272503285547008 |