Transient nature of Arctic spring systems driven by subglacial meltwater
sulfur bearing and isotope analysis suggests springs are fed by deeply circulating glacial meltwater. However, the mechanism maintaining spring flow is unclear in these areas of thick permafrost which would hamper the discharge of deep groundwater to the surface. It has been hypothesized that fractu...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.473.8000 2023-05-15T15:03:25+02:00 Transient nature of Arctic spring systems driven by subglacial meltwater J. M. Scheidegger V. F. Bense S. E. Grasby The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.473.8000 http://lilt.ilstu.edu/ewpeter/GEO488AquiferSystems/documents/Scheidegger-TansientnatureofArcticeSpringwater.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.473.8000 http://lilt.ilstu.edu/ewpeter/GEO488AquiferSystems/documents/Scheidegger-TansientnatureofArcticeSpringwater.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://lilt.ilstu.edu/ewpeter/GEO488AquiferSystems/documents/Scheidegger-TansientnatureofArcticeSpringwater.pdf text ftciteseerx 2016-01-08T07:27:17Z sulfur bearing and isotope analysis suggests springs are fed by deeply circulating glacial meltwater. However, the mechanism maintaining spring flow is unclear in these areas of thick permafrost which would hamper the discharge of deep groundwater to the surface. It has been hypothesized that fracture zones along faults focus groundwater which discharges initially underneath wet-based parts of the ice. With thinning ice, the spring head is exposed to surface temperatures, tens of degrees lower than temperatures of pressure melting, and permafrost starts to develop. Numeri-cal modeling of coupled heat and fluid flow suggest that focused groundwater discharge should eventually be cut off by permafrost encroaching into the feeding channel of the spring. Nevertheless, our model simulations show that these springs can remain flowing for millennia depending on the initial flow rate and ambient surface temperature. These systems might provide a terrestrial analog for the possible occurrence of Martian springs recharged by polar ice caps. Text Arctic Ice permafrost Unknown Arctic |
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ftciteseerx |
language |
English |
description |
sulfur bearing and isotope analysis suggests springs are fed by deeply circulating glacial meltwater. However, the mechanism maintaining spring flow is unclear in these areas of thick permafrost which would hamper the discharge of deep groundwater to the surface. It has been hypothesized that fracture zones along faults focus groundwater which discharges initially underneath wet-based parts of the ice. With thinning ice, the spring head is exposed to surface temperatures, tens of degrees lower than temperatures of pressure melting, and permafrost starts to develop. Numeri-cal modeling of coupled heat and fluid flow suggest that focused groundwater discharge should eventually be cut off by permafrost encroaching into the feeding channel of the spring. Nevertheless, our model simulations show that these springs can remain flowing for millennia depending on the initial flow rate and ambient surface temperature. These systems might provide a terrestrial analog for the possible occurrence of Martian springs recharged by polar ice caps. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J. M. Scheidegger V. F. Bense S. E. Grasby |
spellingShingle |
J. M. Scheidegger V. F. Bense S. E. Grasby Transient nature of Arctic spring systems driven by subglacial meltwater |
author_facet |
J. M. Scheidegger V. F. Bense S. E. Grasby |
author_sort |
J. M. Scheidegger |
title |
Transient nature of Arctic spring systems driven by subglacial meltwater |
title_short |
Transient nature of Arctic spring systems driven by subglacial meltwater |
title_full |
Transient nature of Arctic spring systems driven by subglacial meltwater |
title_fullStr |
Transient nature of Arctic spring systems driven by subglacial meltwater |
title_full_unstemmed |
Transient nature of Arctic spring systems driven by subglacial meltwater |
title_sort |
transient nature of arctic spring systems driven by subglacial meltwater |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.473.8000 http://lilt.ilstu.edu/ewpeter/GEO488AquiferSystems/documents/Scheidegger-TansientnatureofArcticeSpringwater.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost |
genre_facet |
Arctic Ice permafrost |
op_source |
http://lilt.ilstu.edu/ewpeter/GEO488AquiferSystems/documents/Scheidegger-TansientnatureofArcticeSpringwater.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.473.8000 http://lilt.ilstu.edu/ewpeter/GEO488AquiferSystems/documents/Scheidegger-TansientnatureofArcticeSpringwater.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766335271932002304 |