Spatial variability and post-depositional diffusion of stable isotopes in high accumulation regions of East Antarctica
Stable isotopes of Antarcticice cores are used extensively in reconstructing the past climate. Variations in snow accumulation patterns and post-depositional processes such as changes in isotope ratios due to diffusion may complicate these records. We analyzed the spatio-temporal variations of snow...
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ftdoajarticles:oai:doaj.org/article:6a94ca8afb2e4fad81900ce95c55d0f5 2023-05-15T13:53:48+02:00 Spatial variability and post-depositional diffusion of stable isotopes in high accumulation regions of East Antarctica Kanthanathan Mahalinganathan Meloth Thamban Tariq Ejaz Rohit Srivastava B. L. Redkar C. M. Laluraj 2022-08-01T00:00:00Z https://doi.org/10.3389/feart.2022.925447 https://doaj.org/article/6a94ca8afb2e4fad81900ce95c55d0f5 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2022.925447/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2022.925447 https://doaj.org/article/6a94ca8afb2e4fad81900ce95c55d0f5 Frontiers in Earth Science, Vol 10 (2022) stable water isotopes spatial variability isotope signal diffusion snow cores Antarctica Science Q article 2022 ftdoajarticles https://doi.org/10.3389/feart.2022.925447 2022-12-30T22:14:22Z Stable isotopes of Antarcticice cores are used extensively in reconstructing the past climate. Variations in snow accumulation patterns and post-depositional processes such as changes in isotope ratios due to diffusion may complicate these records. We analyzed the spatio-temporal variations of snow accumulation, stable isotopic composition, and factors controlling their distribution along two transects in the Dronning Maud Land (DML) and Princess Elizabeth Land (PEL) regions of East Antarctica. The δ18O and δD variations are dominantly influenced by snow accumulation in the DML region and temperature in the PEL region. To evaluate the extent of diffusion in isotope records, the isotope record of an ice core (IND-33) drilled after 5 years close to the DML transect was compared with the snow isotope records. A quantitative comparison of the snow core δ18O records with that of the ice core revealed signal attenuation ranging between 55 and 70%. Using a firn diffusion model, we estimated a diffusion length of 6 cm in IND-33 over 5 years. Our study revealed that while isotope diffusion exists even in high accumulation sites of coastal Antarctica, it does not significantly impact the dating and paleoclimatic interpretation of isotope records, unlike in low accumulation areas. Article in Journal/Newspaper Antarc* Antarctica DML Dronning Maud Land East Antarctica ice core Princess Elizabeth Land Directory of Open Access Journals: DOAJ Articles Dronning Maud Land East Antarctica Princess Elizabeth Land ENVELOPE(80.367,80.367,-68.500,-68.500) Frontiers in Earth Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
stable water isotopes spatial variability isotope signal diffusion snow cores Antarctica Science Q |
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stable water isotopes spatial variability isotope signal diffusion snow cores Antarctica Science Q Kanthanathan Mahalinganathan Meloth Thamban Tariq Ejaz Rohit Srivastava B. L. Redkar C. M. Laluraj Spatial variability and post-depositional diffusion of stable isotopes in high accumulation regions of East Antarctica |
topic_facet |
stable water isotopes spatial variability isotope signal diffusion snow cores Antarctica Science Q |
description |
Stable isotopes of Antarcticice cores are used extensively in reconstructing the past climate. Variations in snow accumulation patterns and post-depositional processes such as changes in isotope ratios due to diffusion may complicate these records. We analyzed the spatio-temporal variations of snow accumulation, stable isotopic composition, and factors controlling their distribution along two transects in the Dronning Maud Land (DML) and Princess Elizabeth Land (PEL) regions of East Antarctica. The δ18O and δD variations are dominantly influenced by snow accumulation in the DML region and temperature in the PEL region. To evaluate the extent of diffusion in isotope records, the isotope record of an ice core (IND-33) drilled after 5 years close to the DML transect was compared with the snow isotope records. A quantitative comparison of the snow core δ18O records with that of the ice core revealed signal attenuation ranging between 55 and 70%. Using a firn diffusion model, we estimated a diffusion length of 6 cm in IND-33 over 5 years. Our study revealed that while isotope diffusion exists even in high accumulation sites of coastal Antarctica, it does not significantly impact the dating and paleoclimatic interpretation of isotope records, unlike in low accumulation areas. |
format |
Article in Journal/Newspaper |
author |
Kanthanathan Mahalinganathan Meloth Thamban Tariq Ejaz Rohit Srivastava B. L. Redkar C. M. Laluraj |
author_facet |
Kanthanathan Mahalinganathan Meloth Thamban Tariq Ejaz Rohit Srivastava B. L. Redkar C. M. Laluraj |
author_sort |
Kanthanathan Mahalinganathan |
title |
Spatial variability and post-depositional diffusion of stable isotopes in high accumulation regions of East Antarctica |
title_short |
Spatial variability and post-depositional diffusion of stable isotopes in high accumulation regions of East Antarctica |
title_full |
Spatial variability and post-depositional diffusion of stable isotopes in high accumulation regions of East Antarctica |
title_fullStr |
Spatial variability and post-depositional diffusion of stable isotopes in high accumulation regions of East Antarctica |
title_full_unstemmed |
Spatial variability and post-depositional diffusion of stable isotopes in high accumulation regions of East Antarctica |
title_sort |
spatial variability and post-depositional diffusion of stable isotopes in high accumulation regions of east antarctica |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/feart.2022.925447 https://doaj.org/article/6a94ca8afb2e4fad81900ce95c55d0f5 |
long_lat |
ENVELOPE(80.367,80.367,-68.500,-68.500) |
geographic |
Dronning Maud Land East Antarctica Princess Elizabeth Land |
geographic_facet |
Dronning Maud Land East Antarctica Princess Elizabeth Land |
genre |
Antarc* Antarctica DML Dronning Maud Land East Antarctica ice core Princess Elizabeth Land |
genre_facet |
Antarc* Antarctica DML Dronning Maud Land East Antarctica ice core Princess Elizabeth Land |
op_source |
Frontiers in Earth Science, Vol 10 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2022.925447/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2022.925447 https://doaj.org/article/6a94ca8afb2e4fad81900ce95c55d0f5 |
op_doi |
https://doi.org/10.3389/feart.2022.925447 |
container_title |
Frontiers in Earth Science |
container_volume |
10 |
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1766259264967409664 |