Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes
Funding: David W. Rees Jones acknowledges research funding through the NERC Consortium Grant NE/M000427/1 and NERC Standard Grant NE/I026995/1. We would like to thank the Isaac Newton Institute for Mathematical Sciences for its hospitality during the programme Melt in the Mantle, which was supported...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/18032 2023-07-02T03:32:37+02:00 Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes Rees Jones, David W. Wells, Andrew J. University of St Andrews. Applied Mathematics 2019-07-03T11:30:09Z 14 application/pdf http://hdl.handle.net/10023/18032 https://doi.org/10.5194/tc-12-25-2018 eng eng The Cryosphere Rees Jones , D W & Wells , A J 2018 , ' Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes ' , The Cryosphere , vol. 12 , no. 1 , pp. 25-38 . https://doi.org/10.5194/tc-12-25-2018 1994-0416 PURE: 259433704 PURE UUID: 1045f3f1-8c49-4990-affd-15ec727bd8d5 Scopus: 85040369193 ORCID: /0000-0001-8698-401X/work/59222358 http://hdl.handle.net/10023/18032 https://doi.org/10.5194/tc-12-25-2018 © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. QC Physics QE Geology Earth-Surface Processes Water Science and Technology DAS BDC QC QE Journal article 2019 ftstandrewserep https://doi.org/10.5194/tc-12-25-2018 2023-06-13T18:25:53Z Funding: David W. Rees Jones acknowledges research funding through the NERC Consortium Grant NE/M000427/1 and NERC Standard Grant NE/I026995/1. We would like to thank the Isaac Newton Institute for Mathematical Sciences for its hospitality during the programme Melt in the Mantle, which was supported by EPSRC grant number EP/K032208/1 The growth of frazil or granular ice is an important mode of ice formation in the cryosphere. Recent advances have improved our understanding of the microphysical processes that control the rate of ice-crystal growth when water is cooled beneath its freezing temperature. These advances suggest that crystals grow much faster than previously thought. In this paper, we consider models of a population of ice crystals with different sizes to provide insight into the treatment of frazil ice in large-scale models. We consider the role of crystal growth alongside the other physical processes that determine the dynamics of frazil ice. We apply our model to a simple mixed layer (such as at the surface of the ocean) and to a buoyant plume under a floating ice shelf. We provide numerical calculations and scaling arguments to predict the occurrence of frazil-ice explosions, which we show are controlled by crystal growth, nucleation, and gravitational removal. Faster crystal growth, higher secondary nucleation, and slower gravitational removal make frazil-ice explosions more likely. We identify steady-state crystal size distributions, which are largely insensitive to crystal growth rate but are affected by the relative importance of secondary nucleation to gravitational removal. Finally, we show that the fate of plumes underneath ice shelves is dramatically affected by frazil-ice dynamics. Differences in the parameterization of crystal growth and nucleation give rise to radically different predictions of basal accretion and plume dynamics, and can even impact whether a plume reaches the end of the ice shelf or intrudes at depth. Publisher PDF Peer reviewed Article in Journal/Newspaper Ice Shelf Ice Shelves The Cryosphere University of St Andrews: Digital Research Repository The Cryosphere 12 1 25 38 |
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Open Polar |
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University of St Andrews: Digital Research Repository |
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ftstandrewserep |
language |
English |
topic |
QC Physics QE Geology Earth-Surface Processes Water Science and Technology DAS BDC QC QE |
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QC Physics QE Geology Earth-Surface Processes Water Science and Technology DAS BDC QC QE Rees Jones, David W. Wells, Andrew J. Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes |
topic_facet |
QC Physics QE Geology Earth-Surface Processes Water Science and Technology DAS BDC QC QE |
description |
Funding: David W. Rees Jones acknowledges research funding through the NERC Consortium Grant NE/M000427/1 and NERC Standard Grant NE/I026995/1. We would like to thank the Isaac Newton Institute for Mathematical Sciences for its hospitality during the programme Melt in the Mantle, which was supported by EPSRC grant number EP/K032208/1 The growth of frazil or granular ice is an important mode of ice formation in the cryosphere. Recent advances have improved our understanding of the microphysical processes that control the rate of ice-crystal growth when water is cooled beneath its freezing temperature. These advances suggest that crystals grow much faster than previously thought. In this paper, we consider models of a population of ice crystals with different sizes to provide insight into the treatment of frazil ice in large-scale models. We consider the role of crystal growth alongside the other physical processes that determine the dynamics of frazil ice. We apply our model to a simple mixed layer (such as at the surface of the ocean) and to a buoyant plume under a floating ice shelf. We provide numerical calculations and scaling arguments to predict the occurrence of frazil-ice explosions, which we show are controlled by crystal growth, nucleation, and gravitational removal. Faster crystal growth, higher secondary nucleation, and slower gravitational removal make frazil-ice explosions more likely. We identify steady-state crystal size distributions, which are largely insensitive to crystal growth rate but are affected by the relative importance of secondary nucleation to gravitational removal. Finally, we show that the fate of plumes underneath ice shelves is dramatically affected by frazil-ice dynamics. Differences in the parameterization of crystal growth and nucleation give rise to radically different predictions of basal accretion and plume dynamics, and can even impact whether a plume reaches the end of the ice shelf or intrudes at depth. Publisher PDF Peer reviewed |
author2 |
University of St Andrews. Applied Mathematics |
format |
Article in Journal/Newspaper |
author |
Rees Jones, David W. Wells, Andrew J. |
author_facet |
Rees Jones, David W. Wells, Andrew J. |
author_sort |
Rees Jones, David W. |
title |
Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes |
title_short |
Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes |
title_full |
Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes |
title_fullStr |
Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes |
title_full_unstemmed |
Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes |
title_sort |
frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes |
publishDate |
2019 |
url |
http://hdl.handle.net/10023/18032 https://doi.org/10.5194/tc-12-25-2018 |
genre |
Ice Shelf Ice Shelves The Cryosphere |
genre_facet |
Ice Shelf Ice Shelves The Cryosphere |
op_relation |
The Cryosphere Rees Jones , D W & Wells , A J 2018 , ' Frazil-ice growth rate and dynamics in mixed layers and sub-ice-shelf plumes ' , The Cryosphere , vol. 12 , no. 1 , pp. 25-38 . https://doi.org/10.5194/tc-12-25-2018 1994-0416 PURE: 259433704 PURE UUID: 1045f3f1-8c49-4990-affd-15ec727bd8d5 Scopus: 85040369193 ORCID: /0000-0001-8698-401X/work/59222358 http://hdl.handle.net/10023/18032 https://doi.org/10.5194/tc-12-25-2018 |
op_rights |
© Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. |
op_doi |
https://doi.org/10.5194/tc-12-25-2018 |
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The Cryosphere |
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12 |
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op_container_end_page |
38 |
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1770272237931200512 |