TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost
We use TOUGH+/GasH2O to study the effects of a heat source buried in the Martian permafrost to evaluate the possibility of establishing a wet zone of liquid water, in which terrestrial microorganisms could survive and multiply. Analysis of the problem indicates that (1) only a limited permafrost vol...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
eScholarship, University of California
2006
|
Subjects: | |
Online Access: | http://www.escholarship.org/uc/item/1p07407p |
id |
ftcdlib:qt1p07407p |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:qt1p07407p 2023-05-15T16:37:23+02:00 TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost Moridis, George J. Pruess, Karsten 2006-05-12 application/pdf http://www.escholarship.org/uc/item/1p07407p english eng eScholarship, University of California qt1p07407p http://www.escholarship.org/uc/item/1p07407p public Moridis, George J.; & Pruess, Karsten. (2006). TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost. Lawrence Berkeley National Laboratory. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/1p07407p Earth Sciences article 2006 ftcdlib 2016-04-02T18:35:31Z We use TOUGH+/GasH2O to study the effects of a heat source buried in the Martian permafrost to evaluate the possibility of establishing a wet zone of liquid water, in which terrestrial microorganisms could survive and multiply. Analysis of the problem indicates that (1) only a limited permafrost volume (not exceeding 0.35 m in radius) is affected, (2) a "wet" zone with limited amounts of liquid water de-velops (not exceeding 8 and 0.7 kg for a 250 W and a 62.5 W source, respectively), (3) the wet zone per-sists for a long time, becomes practically stationary after t = 20 sols because of venting into the Martian atmosphere, and its thickness is limited and decreases slowly over time, (4) a "dry" zone (where SG > 0.9) evolves, continues to expand (albeit slowly) with time, but its extent remains limited, and (5) the ice front surrounding the wet zone is self-sharpening. For a range of initial conditions investigated, evolution of the liquid water mass occurs at approximately the same rate, reaches roughly the same maximum, and occurs at about the same time (10 to 20 sols; 1 sol = 24.39 hours). Article in Journal/Newspaper Ice permafrost University of California: eScholarship |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Moridis, George J. Pruess, Karsten TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost |
topic_facet |
Earth Sciences |
description |
We use TOUGH+/GasH2O to study the effects of a heat source buried in the Martian permafrost to evaluate the possibility of establishing a wet zone of liquid water, in which terrestrial microorganisms could survive and multiply. Analysis of the problem indicates that (1) only a limited permafrost volume (not exceeding 0.35 m in radius) is affected, (2) a "wet" zone with limited amounts of liquid water de-velops (not exceeding 8 and 0.7 kg for a 250 W and a 62.5 W source, respectively), (3) the wet zone per-sists for a long time, becomes practically stationary after t = 20 sols because of venting into the Martian atmosphere, and its thickness is limited and decreases slowly over time, (4) a "dry" zone (where SG > 0.9) evolves, continues to expand (albeit slowly) with time, but its extent remains limited, and (5) the ice front surrounding the wet zone is self-sharpening. For a range of initial conditions investigated, evolution of the liquid water mass occurs at approximately the same rate, reaches roughly the same maximum, and occurs at about the same time (10 to 20 sols; 1 sol = 24.39 hours). |
format |
Article in Journal/Newspaper |
author |
Moridis, George J. Pruess, Karsten |
author_facet |
Moridis, George J. Pruess, Karsten |
author_sort |
Moridis, George J. |
title |
TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost |
title_short |
TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost |
title_full |
TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost |
title_fullStr |
TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost |
title_full_unstemmed |
TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost |
title_sort |
tough+/gash20 study of the effects of a heat source buried in the martian permafrost |
publisher |
eScholarship, University of California |
publishDate |
2006 |
url |
http://www.escholarship.org/uc/item/1p07407p |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Moridis, George J.; & Pruess, Karsten. (2006). TOUGH+/GasH20 study of the effects of a heat source buried in the Martian permafrost. Lawrence Berkeley National Laboratory. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/1p07407p |
op_relation |
qt1p07407p http://www.escholarship.org/uc/item/1p07407p |
op_rights |
public |
_version_ |
1766027683217539072 |