Isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice
Predicting the isotopic modification of ice by melting processes is important for improving the accuracy in paleoclimate reconstruction. To this end, we present results from cold room laboratory observations of changes in the isotopic ratio (D/H and 18O/16O) of ice cubes by isotopic exchange between...
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Cambridge University Press
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ftdoajarticles:oai:doaj.org/article:92899af30ab6428e87869dd29d4e4526 2023-05-15T16:39:16+02:00 Isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice Ji-Young Ham Soon Do Hur Won Sang Lee Yeongcheol Han Hyejung Jung Jeonghoon Lee 2019-12-01T00:00:00Z https://doi.org/10.1017/jog.2019.75 https://doaj.org/article/92899af30ab6428e87869dd29d4e4526 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143019000753/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.75 0022-1430 1727-5652 https://doaj.org/article/92899af30ab6428e87869dd29d4e4526 Journal of Glaciology, Vol 65, Pp 1035-1043 (2019) Ice chemistry ice core meltwater chemistry Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2019 ftdoajarticles https://doi.org/10.1017/jog.2019.75 2023-03-12T01:30:57Z Predicting the isotopic modification of ice by melting processes is important for improving the accuracy in paleoclimate reconstruction. To this end, we present results from cold room laboratory observations of changes in the isotopic ratio (D/H and 18O/16O) of ice cubes by isotopic exchange between liquid water and ice in nearly isothermal conditions. A 1-D model was fit to the isotopic results by adjusting the values of two parameters, the isotopic exchange rate constant (kr) and the fraction of ice participating in the exchange (f). We found that the rate constant for hydrogen isotopic exchange between liquid water and ice may be greater (up to 40%) than that for the oxygen isotopic exchange. The range of the rate constant obtained from four melt experiments is from 0.21 to 0.82 h–1. The model results also suggest that f decreases with the increasing wetness of the ice. This is because with increasing water saturation in ice, water may be present only in the small pores or some of the water that was exchanged with ice may be bypassed, decreasing the effective surface area over which the isotopic exchange can occur. The relationship between the two water isotopes (δ18O vs δD) was observed and modeled and the slope was <8, which is significantly different from the slope of the meteoric waterline. We note that these slopes were obtained without considering the sublimation process. Article in Journal/Newspaper ice core Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Journal of Glaciology 65 254 1035 1043 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ice chemistry ice core meltwater chemistry Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Ice chemistry ice core meltwater chemistry Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Ji-Young Ham Soon Do Hur Won Sang Lee Yeongcheol Han Hyejung Jung Jeonghoon Lee Isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice |
topic_facet |
Ice chemistry ice core meltwater chemistry Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Predicting the isotopic modification of ice by melting processes is important for improving the accuracy in paleoclimate reconstruction. To this end, we present results from cold room laboratory observations of changes in the isotopic ratio (D/H and 18O/16O) of ice cubes by isotopic exchange between liquid water and ice in nearly isothermal conditions. A 1-D model was fit to the isotopic results by adjusting the values of two parameters, the isotopic exchange rate constant (kr) and the fraction of ice participating in the exchange (f). We found that the rate constant for hydrogen isotopic exchange between liquid water and ice may be greater (up to 40%) than that for the oxygen isotopic exchange. The range of the rate constant obtained from four melt experiments is from 0.21 to 0.82 h–1. The model results also suggest that f decreases with the increasing wetness of the ice. This is because with increasing water saturation in ice, water may be present only in the small pores or some of the water that was exchanged with ice may be bypassed, decreasing the effective surface area over which the isotopic exchange can occur. The relationship between the two water isotopes (δ18O vs δD) was observed and modeled and the slope was <8, which is significantly different from the slope of the meteoric waterline. We note that these slopes were obtained without considering the sublimation process. |
format |
Article in Journal/Newspaper |
author |
Ji-Young Ham Soon Do Hur Won Sang Lee Yeongcheol Han Hyejung Jung Jeonghoon Lee |
author_facet |
Ji-Young Ham Soon Do Hur Won Sang Lee Yeongcheol Han Hyejung Jung Jeonghoon Lee |
author_sort |
Ji-Young Ham |
title |
Isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice |
title_short |
Isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice |
title_full |
Isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice |
title_fullStr |
Isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice |
title_full_unstemmed |
Isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice |
title_sort |
isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice |
publisher |
Cambridge University Press |
publishDate |
2019 |
url |
https://doi.org/10.1017/jog.2019.75 https://doaj.org/article/92899af30ab6428e87869dd29d4e4526 |
genre |
ice core Journal of Glaciology |
genre_facet |
ice core Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 65, Pp 1035-1043 (2019) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143019000753/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.75 0022-1430 1727-5652 https://doaj.org/article/92899af30ab6428e87869dd29d4e4526 |
op_doi |
https://doi.org/10.1017/jog.2019.75 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
254 |
container_start_page |
1035 |
op_container_end_page |
1043 |
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1766029608096890880 |