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http://hdl.handle.net/1893/33142| Appears in Collections: | Biological and Environmental Sciences Journal Articles |
| Peer Review Status: | Refereed |
| Title: | Near Surface Properties of Martian Regolith Derived From InSight HP3-RAD Temperature Observations During Phobos Transits |
| Author(s): | Mueller, Nils Piqueux, Sylvain Lemmon, Mark Maki, Justin Lorenz, Ralph D Grott, Matthias Spohn, Tilman Smrekar, Suzanne E Knollenberg, Jorg Hudson, Troy Lee Krause, Christian Millour, Ehouarn Forget, Francois Golombek, Matthew Attree, Nicholas |
| Keywords: | phobos transit thermal inertia thermal conductivity |
| Issue Date: | Aug-2021 |
| Date Deposited: | 24-Aug-2021 |
| Citation: | Mueller N, Piqueux S, Lemmon M, Maki J, Lorenz RD, Grott M, Spohn T, Smrekar SE, Knollenberg J, Hudson TL, Krause C, Millour E, Forget F, Golombek M & Attree N (2021) Near Surface Properties of Martian Regolith Derived From InSight HP3-RAD Temperature Observations During Phobos Transits. Geophysical Research Letters, 48 (15), Art. No.: e2021GL093542. https://doi.org/10.1029/2021GL093542 |
| Abstract: | The Mars moon Phobos passed in front of the Sun from the perspective of the InSight lander on several occasions. The Mars surface temperatures measured by the lander became slightly colder during these transits due to the lower amount of sunlight the surface received at this time. The transits only last 20–35 s and therefore only the very top layer, about 0.3–0.8 mm, of the ground has time to cool significantly. The top layer cools and heats up faster than we expected based on the temperature changes of the day-night cycle, which affects about 4 cm of the ground. Based on this observation we conclude that the material in the top mm of the ground is different from that below. A possible explanation would be an increase of density with depth, a larger fraction of smaller particles such as dust at the top, or a layer where particles are slightly cemented together beginning at 0.2–4 mm below the surface. |
| DOI Link: | 10.1029/2021GL093542 |
| Rights: | © 2021. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
| Notes: | Additional co-authors: Axel Hagermann, Matthew Siegler, and W Bruce Banerdt |
| Licence URL(s): | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 2021GL093542.pdf | Fulltext - Published Version | 720.92 kB | Adobe PDF | View/Open |
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