Home > Research > Publications & Outputs > Tephra deposition on glaciers and ice sheets on...

Associated organisational unit

View graph of relations

Tephra deposition on glaciers and ice sheets on Mars : influence on ice survival, debris content and flow behavior.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

Tephra deposition on glaciers and ice sheets on Mars : influence on ice survival, debris content and flow behavior. / Wilson, Lionel; Head, James W.
In: Journal of Volcanology and Geothermal Research, Vol. 185, No. 4, 10.09.2009, p. 290-297.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

APA

Vancouver

Wilson L, Head JW. Tephra deposition on glaciers and ice sheets on Mars : influence on ice survival, debris content and flow behavior. Journal of Volcanology and Geothermal Research. 2009 Sept 10;185(4):290-297. doi: 10.1016/j.jvolgeores.2008.10.003

Author

Wilson, Lionel ; Head, James W. / Tephra deposition on glaciers and ice sheets on Mars : influence on ice survival, debris content and flow behavior. In: Journal of Volcanology and Geothermal Research. 2009 ; Vol. 185, No. 4. pp. 290-297.

Bibtex

@article{39416ac3ac444548a3e3896f70148319,
title = "Tephra deposition on glaciers and ice sheets on Mars : influence on ice survival, debris content and flow behavior.",
abstract = "We examine the consequences of pyroclastic deposits being emplaced onto ice layers on Mars, both those in the polar caps and those forming glaciers on the flanks of some of the large shield volcanoes. We show that layers of pyroclasts greater than a few meters in thickness, whether emplaced cold (as fall deposits) or hot (as pyroclastic density current deposits) act almost exclusively to protect ice layers beneath them from sublimation, irrespective of whether they are emplaced at high or low elevations or high or low latitudes. Layers less than about 2 m thick, on the other hand, can cause significant ice loss by raising the surface temperature due to their low albedo and then transmitting that increased temperature to the underlying ice, especially on a diurnal time scale. This can have a significant bearing on the emplacement history of polar water ice and on the survival time of glacial ice on shield volcano flanks. A key factor in the latter case is the timing of the episodic volcanic activity relative to the cycles of climate change driven by Mars' obliquity and eccentricity variations.",
keywords = "Mars, glacier, volcano, tephra",
author = "Lionel Wilson and Head, {James W.}",
year = "2009",
month = sep,
day = "10",
doi = "10.1016/j.jvolgeores.2008.10.003",
language = "English",
volume = "185",
pages = "290--297",
journal = "Journal of Volcanology and Geothermal Research",
issn = "0377-0273",
publisher = "Elsevier Science B.V.",
number = "4",

}

RIS

TY - JOUR

T1 - Tephra deposition on glaciers and ice sheets on Mars : influence on ice survival, debris content and flow behavior.

AU - Wilson, Lionel

AU - Head, James W.

PY - 2009/9/10

Y1 - 2009/9/10

N2 - We examine the consequences of pyroclastic deposits being emplaced onto ice layers on Mars, both those in the polar caps and those forming glaciers on the flanks of some of the large shield volcanoes. We show that layers of pyroclasts greater than a few meters in thickness, whether emplaced cold (as fall deposits) or hot (as pyroclastic density current deposits) act almost exclusively to protect ice layers beneath them from sublimation, irrespective of whether they are emplaced at high or low elevations or high or low latitudes. Layers less than about 2 m thick, on the other hand, can cause significant ice loss by raising the surface temperature due to their low albedo and then transmitting that increased temperature to the underlying ice, especially on a diurnal time scale. This can have a significant bearing on the emplacement history of polar water ice and on the survival time of glacial ice on shield volcano flanks. A key factor in the latter case is the timing of the episodic volcanic activity relative to the cycles of climate change driven by Mars' obliquity and eccentricity variations.

AB - We examine the consequences of pyroclastic deposits being emplaced onto ice layers on Mars, both those in the polar caps and those forming glaciers on the flanks of some of the large shield volcanoes. We show that layers of pyroclasts greater than a few meters in thickness, whether emplaced cold (as fall deposits) or hot (as pyroclastic density current deposits) act almost exclusively to protect ice layers beneath them from sublimation, irrespective of whether they are emplaced at high or low elevations or high or low latitudes. Layers less than about 2 m thick, on the other hand, can cause significant ice loss by raising the surface temperature due to their low albedo and then transmitting that increased temperature to the underlying ice, especially on a diurnal time scale. This can have a significant bearing on the emplacement history of polar water ice and on the survival time of glacial ice on shield volcano flanks. A key factor in the latter case is the timing of the episodic volcanic activity relative to the cycles of climate change driven by Mars' obliquity and eccentricity variations.

KW - Mars

KW - glacier

KW - volcano

KW - tephra

U2 - 10.1016/j.jvolgeores.2008.10.003

DO - 10.1016/j.jvolgeores.2008.10.003

M3 - Journal article

VL - 185

SP - 290

EP - 297

JO - Journal of Volcanology and Geothermal Research

JF - Journal of Volcanology and Geothermal Research

SN - 0377-0273

IS - 4

ER -