A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on Lomonosovfonna, Svalbard
Physical and chemical properties of four different ice cores (LF-97, LF-08, LF-09 and LF-11) drilled at Lomonosovfonna, Svalbard, were compared to investigate the effects of meltwater percolation on the chemical and physical stratigraphy of these records. A synthetic ice core approach was employed a...
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ftcopernicus:oai:publications.copernicus.org:tc31877 2023-05-15T16:38:52+02:00 A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on Lomonosovfonna, Svalbard Vega, Carmen P. Pohjola, Veijo A. Beaudon, Emilie Claremar, Björn Pelt, Ward J. J. Pettersson, Rickard Isaksson, Elisabeth Martma, Tõnu Schwikowski, Margit Bøggild, Carl E. 2018-09-27 application/pdf https://doi.org/10.5194/tc-10-961-2016 https://tc.copernicus.org/articles/10/961/2016/ eng eng doi:10.5194/tc-10-961-2016 https://tc.copernicus.org/articles/10/961/2016/ eISSN: 1994-0424 Text 2018 ftcopernicus https://doi.org/10.5194/tc-10-961-2016 2020-07-20T16:24:09Z Physical and chemical properties of four different ice cores (LF-97, LF-08, LF-09 and LF-11) drilled at Lomonosovfonna, Svalbard, were compared to investigate the effects of meltwater percolation on the chemical and physical stratigraphy of these records. A synthetic ice core approach was employed as reference record to estimate the ionic relocation and meltwater percolation length at this site during the period 2007–2010. Using this method, a partial ion elution sequence obtained for Lomonosovfonna was NO 3 − > SO 4 2− , Mg 2+ , Cl − , K + , Na + with nitrate being the most mobile within the snowpack. The relocation length of most of the ions was on the order of 1 m during this period. In addition, by using both a positive degree day (PDD) and a snow–energy model approaches to estimate the percentage of melt at Lomonosovfonna, we have calculated a melt percentage (MP) of the total annual accumulation within the range between 48 and 70 %, for the period between 2007 and 2010, which is above the MP range suggested by the ion relocation evidenced in the LF-syn core (i.e., MP = 30 %). Using a firn-densification model to constrain the melt range, a MP of 30 % was found over the same period, which is consistent with the results of the synthetic ice core approach, and a 45 % of melt for the last 60 years. Considering the ionic relocation lengths and annual melt percentages, we estimate that the atmospheric ionic signal remains preserved in recently drilled Lomonosovfonna ice cores at an annual or bi-annual resolution when weather conditions were similar to those during the 2007–2010 period. Text ice core Svalbard Copernicus Publications: E-Journals Svalbard Lomonosovfonna ENVELOPE(17.663,17.663,78.774,78.774) The Cryosphere 10 3 961 976 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Physical and chemical properties of four different ice cores (LF-97, LF-08, LF-09 and LF-11) drilled at Lomonosovfonna, Svalbard, were compared to investigate the effects of meltwater percolation on the chemical and physical stratigraphy of these records. A synthetic ice core approach was employed as reference record to estimate the ionic relocation and meltwater percolation length at this site during the period 2007–2010. Using this method, a partial ion elution sequence obtained for Lomonosovfonna was NO 3 − > SO 4 2− , Mg 2+ , Cl − , K + , Na + with nitrate being the most mobile within the snowpack. The relocation length of most of the ions was on the order of 1 m during this period. In addition, by using both a positive degree day (PDD) and a snow–energy model approaches to estimate the percentage of melt at Lomonosovfonna, we have calculated a melt percentage (MP) of the total annual accumulation within the range between 48 and 70 %, for the period between 2007 and 2010, which is above the MP range suggested by the ion relocation evidenced in the LF-syn core (i.e., MP = 30 %). Using a firn-densification model to constrain the melt range, a MP of 30 % was found over the same period, which is consistent with the results of the synthetic ice core approach, and a 45 % of melt for the last 60 years. Considering the ionic relocation lengths and annual melt percentages, we estimate that the atmospheric ionic signal remains preserved in recently drilled Lomonosovfonna ice cores at an annual or bi-annual resolution when weather conditions were similar to those during the 2007–2010 period. |
format |
Text |
author |
Vega, Carmen P. Pohjola, Veijo A. Beaudon, Emilie Claremar, Björn Pelt, Ward J. J. Pettersson, Rickard Isaksson, Elisabeth Martma, Tõnu Schwikowski, Margit Bøggild, Carl E. |
spellingShingle |
Vega, Carmen P. Pohjola, Veijo A. Beaudon, Emilie Claremar, Björn Pelt, Ward J. J. Pettersson, Rickard Isaksson, Elisabeth Martma, Tõnu Schwikowski, Margit Bøggild, Carl E. A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on Lomonosovfonna, Svalbard |
author_facet |
Vega, Carmen P. Pohjola, Veijo A. Beaudon, Emilie Claremar, Björn Pelt, Ward J. J. Pettersson, Rickard Isaksson, Elisabeth Martma, Tõnu Schwikowski, Margit Bøggild, Carl E. |
author_sort |
Vega, Carmen P. |
title |
A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on Lomonosovfonna, Svalbard |
title_short |
A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on Lomonosovfonna, Svalbard |
title_full |
A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on Lomonosovfonna, Svalbard |
title_fullStr |
A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on Lomonosovfonna, Svalbard |
title_full_unstemmed |
A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on Lomonosovfonna, Svalbard |
title_sort |
synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on lomonosovfonna, svalbard |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-10-961-2016 https://tc.copernicus.org/articles/10/961/2016/ |
long_lat |
ENVELOPE(17.663,17.663,78.774,78.774) |
geographic |
Svalbard Lomonosovfonna |
geographic_facet |
Svalbard Lomonosovfonna |
genre |
ice core Svalbard |
genre_facet |
ice core Svalbard |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-10-961-2016 https://tc.copernicus.org/articles/10/961/2016/ |
op_doi |
https://doi.org/10.5194/tc-10-961-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
3 |
container_start_page |
961 |
op_container_end_page |
976 |
_version_ |
1766029217469825024 |