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...
Published in: | Frontiers in Physics |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Frontiers Media SA
2022
|
Subjects: | |
Online Access: | http://dx.doi.org/10.3389/fphy.2022.904836 https://www.frontiersin.org/articles/10.3389/fphy.2022.904836/full |
id |
crfrontiers:10.3389/fphy.2022.904836 |
---|---|
record_format |
openpolar |
spelling |
crfrontiers:10.3389/fphy.2022.904836 2024-03-03T08:45:17+00:00 Biolocomotion and Premelting in Ice Vachier, Jérémy Wettlaufer, John S. 2022 http://dx.doi.org/10.3389/fphy.2022.904836 https://www.frontiersin.org/articles/10.3389/fphy.2022.904836/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Physics volume 10 ISSN 2296-424X Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics Materials Science (miscellaneous) Biophysics journal-article 2022 crfrontiers https://doi.org/10.3389/fphy.2022.904836 2024-02-03T23:18:01Z 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 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 competition 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. Article in Journal/Newspaper Ice permafrost Frontiers (Publisher) Frontiers in Physics 10 |
institution |
Open Polar |
collection |
Frontiers (Publisher) |
op_collection_id |
crfrontiers |
language |
unknown |
topic |
Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics Materials Science (miscellaneous) Biophysics |
spellingShingle |
Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics Materials Science (miscellaneous) Biophysics Vachier, Jérémy Wettlaufer, John S. Biolocomotion and Premelting in Ice |
topic_facet |
Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics Materials Science (miscellaneous) Biophysics |
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 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 competition 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 |
Article in Journal/Newspaper |
author |
Vachier, Jérémy Wettlaufer, John S. |
author_facet |
Vachier, Jérémy Wettlaufer, John S. |
author_sort |
Vachier, Jérémy |
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 |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fphy.2022.904836 https://www.frontiersin.org/articles/10.3389/fphy.2022.904836/full |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Frontiers in Physics volume 10 ISSN 2296-424X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fphy.2022.904836 |
container_title |
Frontiers in Physics |
container_volume |
10 |
_version_ |
1792500820775796736 |