Numerical experiments on firn isotope diffusion with the Community Firn Model
Advances in analytical methods have made it possible to obtain high-resolution water isotopic data from ice cores. Their spectral signature contains information on the diffusion process that attenuated the isotopic signal during the firn densification process. Here, we provide a tool for estimating...
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2021
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Online Access: | https://curis.ku.dk/portal/da/publications/numerical-experiments-on-firn-isotope-diffusion-with-the-community-firn-model(0aa23f4f-64d5-495c-a5a0-7ecfbf187cb1).html https://doi.org/10.1017/jog.2021.1 https://curis.ku.dk/ws/files/269499510/numerical_experiments_on_firn_isotope_diffusion_with_the_community_firn_model.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/0aa23f4f-64d5-495c-a5a0-7ecfbf187cb1 2024-05-19T07:31:32+00:00 Numerical experiments on firn isotope diffusion with the Community Firn Model Gkinis, Vasileios Holme, Christian Kahle, Emma C. Stevens, Max C. Steig, Eric J. Vinther, Bo M. 2021-06-01 application/pdf https://curis.ku.dk/portal/da/publications/numerical-experiments-on-firn-isotope-diffusion-with-the-community-firn-model(0aa23f4f-64d5-495c-a5a0-7ecfbf187cb1).html https://doi.org/10.1017/jog.2021.1 https://curis.ku.dk/ws/files/269499510/numerical_experiments_on_firn_isotope_diffusion_with_the_community_firn_model.pdf eng eng info:eu-repo/semantics/openAccess Gkinis , V , Holme , C , Kahle , E C , Stevens , M C , Steig , E J & Vinther , B M 2021 , ' Numerical experiments on firn isotope diffusion with the Community Firn Model ' , Journal of Glaciology , vol. 67 , no. 263 , pp. 450-472 . https://doi.org/10.1017/jog.2021.1 Glaciological model experiments ice and climate ice core ice temperature polar firn STABLE WATER ISOTOPES CONTINUOUS-FLOW ANALYSIS DRONNING MAUD LAND ICE-CORE DOME C TEMPERATURE FRACTIONATION RECORDS DENSIFICATION article 2021 ftcopenhagenunip https://doi.org/10.1017/jog.2021.1 2024-05-02T00:33:13Z Advances in analytical methods have made it possible to obtain high-resolution water isotopic data from ice cores. Their spectral signature contains information on the diffusion process that attenuated the isotopic signal during the firn densification process. Here, we provide a tool for estimating firn-diffusion rates that builds on the Community Firn Model. Our model requires two main inputs, temperature and accumulation, and it calculates the diffusion lengths for delta O-17, delta O-18 and delta D. Prior information on the isotopic signal of the precipitation is not a requirement. In combination with deconvolution techniques, diffusion lengths can be used in order reconstruct the pre-diffusion isotopic signal. Furthermore, the temperature dependence of the isotope diffusion and firn densification makes the diffusion length an interesting candidate as a temperature proxy. We test the model under steady state and transient scenarios and compare four densification models. Comparisons with ice core data provide an evaluation of the four models and indicate that there are differences in their performance. Combining data-based diffusion length estimates with information on past accumulation rates and ice flow thinning, we reconstruct absolute temperatures from three Antarctic ice core sites. Article in Journal/Newspaper Antarc* Antarctic Dronning Maud Land ice core Journal of Glaciology University of Copenhagen: Research Journal of Glaciology 67 263 450 472 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Glaciological model experiments ice and climate ice core ice temperature polar firn STABLE WATER ISOTOPES CONTINUOUS-FLOW ANALYSIS DRONNING MAUD LAND ICE-CORE DOME C TEMPERATURE FRACTIONATION RECORDS DENSIFICATION |
spellingShingle |
Glaciological model experiments ice and climate ice core ice temperature polar firn STABLE WATER ISOTOPES CONTINUOUS-FLOW ANALYSIS DRONNING MAUD LAND ICE-CORE DOME C TEMPERATURE FRACTIONATION RECORDS DENSIFICATION Gkinis, Vasileios Holme, Christian Kahle, Emma C. Stevens, Max C. Steig, Eric J. Vinther, Bo M. Numerical experiments on firn isotope diffusion with the Community Firn Model |
topic_facet |
Glaciological model experiments ice and climate ice core ice temperature polar firn STABLE WATER ISOTOPES CONTINUOUS-FLOW ANALYSIS DRONNING MAUD LAND ICE-CORE DOME C TEMPERATURE FRACTIONATION RECORDS DENSIFICATION |
description |
Advances in analytical methods have made it possible to obtain high-resolution water isotopic data from ice cores. Their spectral signature contains information on the diffusion process that attenuated the isotopic signal during the firn densification process. Here, we provide a tool for estimating firn-diffusion rates that builds on the Community Firn Model. Our model requires two main inputs, temperature and accumulation, and it calculates the diffusion lengths for delta O-17, delta O-18 and delta D. Prior information on the isotopic signal of the precipitation is not a requirement. In combination with deconvolution techniques, diffusion lengths can be used in order reconstruct the pre-diffusion isotopic signal. Furthermore, the temperature dependence of the isotope diffusion and firn densification makes the diffusion length an interesting candidate as a temperature proxy. We test the model under steady state and transient scenarios and compare four densification models. Comparisons with ice core data provide an evaluation of the four models and indicate that there are differences in their performance. Combining data-based diffusion length estimates with information on past accumulation rates and ice flow thinning, we reconstruct absolute temperatures from three Antarctic ice core sites. |
format |
Article in Journal/Newspaper |
author |
Gkinis, Vasileios Holme, Christian Kahle, Emma C. Stevens, Max C. Steig, Eric J. Vinther, Bo M. |
author_facet |
Gkinis, Vasileios Holme, Christian Kahle, Emma C. Stevens, Max C. Steig, Eric J. Vinther, Bo M. |
author_sort |
Gkinis, Vasileios |
title |
Numerical experiments on firn isotope diffusion with the Community Firn Model |
title_short |
Numerical experiments on firn isotope diffusion with the Community Firn Model |
title_full |
Numerical experiments on firn isotope diffusion with the Community Firn Model |
title_fullStr |
Numerical experiments on firn isotope diffusion with the Community Firn Model |
title_full_unstemmed |
Numerical experiments on firn isotope diffusion with the Community Firn Model |
title_sort |
numerical experiments on firn isotope diffusion with the community firn model |
publishDate |
2021 |
url |
https://curis.ku.dk/portal/da/publications/numerical-experiments-on-firn-isotope-diffusion-with-the-community-firn-model(0aa23f4f-64d5-495c-a5a0-7ecfbf187cb1).html https://doi.org/10.1017/jog.2021.1 https://curis.ku.dk/ws/files/269499510/numerical_experiments_on_firn_isotope_diffusion_with_the_community_firn_model.pdf |
genre |
Antarc* Antarctic Dronning Maud Land ice core Journal of Glaciology |
genre_facet |
Antarc* Antarctic Dronning Maud Land ice core Journal of Glaciology |
op_source |
Gkinis , V , Holme , C , Kahle , E C , Stevens , M C , Steig , E J & Vinther , B M 2021 , ' Numerical experiments on firn isotope diffusion with the Community Firn Model ' , Journal of Glaciology , vol. 67 , no. 263 , pp. 450-472 . https://doi.org/10.1017/jog.2021.1 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/jog.2021.1 |
container_title |
Journal of Glaciology |
container_volume |
67 |
container_issue |
263 |
container_start_page |
450 |
op_container_end_page |
472 |
_version_ |
1799469398222700544 |