Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/26995
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Experimental investigation of insolation-driven dust ejection from Mars' CO2 ice caps
Author(s): Kaufmann, Erika
Hagermann, Axel
Keywords: CO2 ice
Mars, polar caps
Laboratory experiments
Martian spider formation
Solid state greenhouse effect
Issue Date: 15-Jan-2017
Citation: Kaufmann E & Hagermann A (2017) Experimental investigation of insolation-driven dust ejection from Mars' CO2 ice caps, Icarus, 282, pp. 118-126.
Abstract: Mars’ polar caps are – depending on hemisphere and season - partially or totally covered with CO2 ice. Icy surfaces such as the polar caps of Mars behave differently from surfaces covered with rock and soil when they are irradiated by solar light. The latter absorb and reflect incoming solar radiation within a thin layer beneath the surface. In contrast, ices are partially transparent in the visible spectral range and opaque in the infrared. Due to this fact, the solar radiation can penetrate to a certain depth and raise the temperature of the ice or dust below the surface. This may play an important role in the energy balance of icy surfaces in the solar system, as already noted in previous investigations. We investigated the temperature profiles inside CO2 ice samples including a dust layer under Martian conditions. We have been able to trigger dust eruptions, but also demonstrated that these require a very narrow range of temperature and ambient pressure. We discuss possible implications for the understanding of phenomena such as arachneiform patterns or fan shaped deposits as observed in Mars’ southern polar region. © 2016
DOI Link: http://dx.doi.org/10.1016/j.icarus.2016.09.039
Rights: © 2016 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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