Air-hydrate crystal growth in polar ice
Based on the theory of precipitation from supersaturated solutions proposed by Lifshitz and Slyozov (J. Phys. Chem. Solids 19 (1/2) (1961) 35), we develop a mathematical description of post-formation growth (ripening) of mixed air clathrate-hydrate crystalline inclusions in polar ice sheets. The gro...
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ftneicon:oai:rour.neicon.ru:rour/129045 2023-05-15T14:00:24+02:00 Air-hydrate crystal growth in polar ice Salamatin A. Lipenkov V. Hondoh T. 2003 https://openrepository.ru/article?id=129045 unknown Journal of Crystal Growth 3-4 412 257 0022-0248 https://openrepository.ru/article?id=129045 SCOPUS00220248-2003-257-34-SID0042362031 A1. Diffusion A1. Supersaturated solutions A2. Natural crystal growth B1. Clathrate hydrates Article 2003 ftneicon 2020-07-21T11:47:06Z Based on the theory of precipitation from supersaturated solutions proposed by Lifshitz and Slyozov (J. Phys. Chem. Solids 19 (1/2) (1961) 35), we develop a mathematical description of post-formation growth (ripening) of mixed air clathrate-hydrate crystalline inclusions in polar ice sheets. The growth is controlled by oxygen and nitrogen diffusion through the ice matrix. Hydrate populations in general go through three sequential stages: (1) a short transient characterized by the rapid composition relaxation and dissolution of the smallest hydrates, (2) a slow transformation of the resulting size distributions towards a steady-state pattern that is an attribute of (3) the asymptotic stage of ripening. A regularization procedure is used to numerically solve the initial value problem. Computer simulations of the hydrate size distributions are compared to the data from a 3300-m ice core from Vostok Station, East Antarctica. The asymptotic stage is likely unattainable in natural conditions. Data from the GRIP ice core (central Greenland) suggest that the activation energy of hydrate growth increases at the elevated temperature near the ice-sheet bottom. The theory predicts extinction of the climatically induced fluctuations in the hydrate number-concentration and mean-radius profiles in ice sheets with depth. © 2003 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Greenland GRIP ice core Ice Sheet NORA (National aggregator of open repositories of Russian universities) East Antarctica Greenland Vostok Station ENVELOPE(106.837,106.837,-78.464,-78.464) |
institution |
Open Polar |
collection |
NORA (National aggregator of open repositories of Russian universities) |
op_collection_id |
ftneicon |
language |
unknown |
topic |
A1. Diffusion A1. Supersaturated solutions A2. Natural crystal growth B1. Clathrate hydrates |
spellingShingle |
A1. Diffusion A1. Supersaturated solutions A2. Natural crystal growth B1. Clathrate hydrates Salamatin A. Lipenkov V. Hondoh T. Air-hydrate crystal growth in polar ice |
topic_facet |
A1. Diffusion A1. Supersaturated solutions A2. Natural crystal growth B1. Clathrate hydrates |
description |
Based on the theory of precipitation from supersaturated solutions proposed by Lifshitz and Slyozov (J. Phys. Chem. Solids 19 (1/2) (1961) 35), we develop a mathematical description of post-formation growth (ripening) of mixed air clathrate-hydrate crystalline inclusions in polar ice sheets. The growth is controlled by oxygen and nitrogen diffusion through the ice matrix. Hydrate populations in general go through three sequential stages: (1) a short transient characterized by the rapid composition relaxation and dissolution of the smallest hydrates, (2) a slow transformation of the resulting size distributions towards a steady-state pattern that is an attribute of (3) the asymptotic stage of ripening. A regularization procedure is used to numerically solve the initial value problem. Computer simulations of the hydrate size distributions are compared to the data from a 3300-m ice core from Vostok Station, East Antarctica. The asymptotic stage is likely unattainable in natural conditions. Data from the GRIP ice core (central Greenland) suggest that the activation energy of hydrate growth increases at the elevated temperature near the ice-sheet bottom. The theory predicts extinction of the climatically induced fluctuations in the hydrate number-concentration and mean-radius profiles in ice sheets with depth. © 2003 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Salamatin A. Lipenkov V. Hondoh T. |
author_facet |
Salamatin A. Lipenkov V. Hondoh T. |
author_sort |
Salamatin A. |
title |
Air-hydrate crystal growth in polar ice |
title_short |
Air-hydrate crystal growth in polar ice |
title_full |
Air-hydrate crystal growth in polar ice |
title_fullStr |
Air-hydrate crystal growth in polar ice |
title_full_unstemmed |
Air-hydrate crystal growth in polar ice |
title_sort |
air-hydrate crystal growth in polar ice |
publishDate |
2003 |
url |
https://openrepository.ru/article?id=129045 |
long_lat |
ENVELOPE(106.837,106.837,-78.464,-78.464) |
geographic |
East Antarctica Greenland Vostok Station |
geographic_facet |
East Antarctica Greenland Vostok Station |
genre |
Antarc* Antarctica East Antarctica Greenland GRIP ice core Ice Sheet |
genre_facet |
Antarc* Antarctica East Antarctica Greenland GRIP ice core Ice Sheet |
op_source |
SCOPUS00220248-2003-257-34-SID0042362031 |
op_relation |
Journal of Crystal Growth 3-4 412 257 0022-0248 https://openrepository.ru/article?id=129045 |
_version_ |
1766269488952508416 |