Biolocomotion and premelting in ice
Biota are found in glaciers, ice sheets and permafrost. Ice bound micro-organisms evolve in a complex mobile environment facilitated or hindered by a range of bulk and surface interactions. When a particle is embedded in a host solid near its bulk melting temperature, a melted film forms at the surf...
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ftdatacite:10.48550/arxiv.2203.14038 2023-05-15T16:37:30+02:00 Biolocomotion and premelting in ice Vachier, Jeremy Wettlaufer, John. S 2022 https://dx.doi.org/10.48550/arxiv.2203.14038 https://arxiv.org/abs/2203.14038 unknown arXiv Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Soft Condensed Matter cond-mat.soft Biological Physics physics.bio-ph FOS Physical sciences Preprint Article article CreativeWork 2022 ftdatacite https://doi.org/10.48550/arxiv.2203.14038 2022-04-01T18:28:54Z Biota are found in glaciers, ice sheets and permafrost. Ice bound micro-organisms evolve in a complex mobile environment facilitated or hindered by a range of bulk and surface interactions. When a particle is embedded in a host solid near its bulk melting temperature, a melted film forms at the surface of the particle in a process known as interfacial premelting. Under a temperature gradient, the particle is driven by a thermomolecular pressure gradient toward regions of higher temperatures in a process called thermal regelation. When the host solid is ice and the particles are biota, thriving in their environment requires the development of strategies, such as producing exopolymeric substances (EPS) and antifreeze glycoproteins (AFP) that enhance the interfacial water. Therefore, thermal regelation is enhanced and modified by a process we term {\em bio-enhanced premelting}. Additionally, the motion of bioparticles is influenced by chemical gradients influenced by nutrients within the icy host body. We show how the overall trajectory of bioparticles is controlled by a competion between thermal regelation and directed biolocomotion. By re-casting this class of regelation phenomena in the stochastic framework of active Ornstein-Uhlenbeck dynamics, and using multiple scales analysis, we find that for an attractive (repulsive) nutrient source, that thermal regelation is enhanced (suppressed) by biolocomotion. This phenomena is important in astrobiology, the biosignatures of extremophiles and in terrestrial paleoclimatology. Report Ice permafrost DataCite Metadata Store (German National Library of Science and Technology) |
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Soft Condensed Matter cond-mat.soft Biological Physics physics.bio-ph FOS Physical sciences |
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Soft Condensed Matter cond-mat.soft Biological Physics physics.bio-ph FOS Physical sciences Vachier, Jeremy Wettlaufer, John. S Biolocomotion and premelting in ice |
topic_facet |
Soft Condensed Matter cond-mat.soft Biological Physics physics.bio-ph FOS Physical sciences |
description |
Biota are found in glaciers, ice sheets and permafrost. Ice bound micro-organisms evolve in a complex mobile environment facilitated or hindered by a range of bulk and surface interactions. When a particle is embedded in a host solid near its bulk melting temperature, a melted film forms at the surface of the particle in a process known as interfacial premelting. Under a temperature gradient, the particle is driven by a thermomolecular pressure gradient toward regions of higher temperatures in a process called thermal regelation. When the host solid is ice and the particles are biota, thriving in their environment requires the development of strategies, such as producing exopolymeric substances (EPS) and antifreeze glycoproteins (AFP) that enhance the interfacial water. Therefore, thermal regelation is enhanced and modified by a process we term {\em bio-enhanced premelting}. Additionally, the motion of bioparticles is influenced by chemical gradients influenced by nutrients within the icy host body. We show how the overall trajectory of bioparticles is controlled by a competion between thermal regelation and directed biolocomotion. By re-casting this class of regelation phenomena in the stochastic framework of active Ornstein-Uhlenbeck dynamics, and using multiple scales analysis, we find that for an attractive (repulsive) nutrient source, that thermal regelation is enhanced (suppressed) by biolocomotion. This phenomena is important in astrobiology, the biosignatures of extremophiles and in terrestrial paleoclimatology. |
format |
Report |
author |
Vachier, Jeremy Wettlaufer, John. S |
author_facet |
Vachier, Jeremy Wettlaufer, John. S |
author_sort |
Vachier, Jeremy |
title |
Biolocomotion and premelting in ice |
title_short |
Biolocomotion and premelting in ice |
title_full |
Biolocomotion and premelting in ice |
title_fullStr |
Biolocomotion and premelting in ice |
title_full_unstemmed |
Biolocomotion and premelting in ice |
title_sort |
biolocomotion and premelting in ice |
publisher |
arXiv |
publishDate |
2022 |
url |
https://dx.doi.org/10.48550/arxiv.2203.14038 https://arxiv.org/abs/2203.14038 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.48550/arxiv.2203.14038 |
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1766027797660172288 |