DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Tropical Frost on Martian Volcanoes

Valantinas, A. and Thomas, N. and Pommerol, A. and Hauber, Ernst and Bickel, Valentin and Schorghofer, Norbert and McEwen, A. and Almeida, Miguel and Read, M.R. and Rangarajan, V.G. and Munaretto, G. and Pajola, M and Re, Cristina and Cremonese, G (2023) Tropical Frost on Martian Volcanoes. 54th Lunar and Planetary Science Conference 2023, 13.-17.03.2023, The Woodlands, TX (USA).

[img] PDF

Official URL: https://www.hou.usra.edu/meetings/lpsc2023/pdf/1539.pdf


The sublimation and condensation of frost is an important driver of several active geomorphological processes on Mars [1]. It is estimated [2] that there are hundreds of thousands of slope streaks in the equatorial regions - latitudes that are devoid of H 2O frost from 13°S to 32°N [3]. CO 2 frost on the other hand, based on the analysis of surface nighttime temperatures and thermal modeling, was suggested to condense at night in the dusty equatorial regions [4] and on the tallest Tharsis volcanoes [5]. It was proposed that the diurnal sublimation and condensation cycle of CO2 frost may destabilize dusty slopes and trigger slope streaks [4]. Recent studies [6] attempted to detect the putative equatorial frost using early morning observations of the Thermal Emission Imaging System (THEMIS) [7] but were not successful. Using novel observations of the Colour and Stereo Surface Imaging System (CaSSIS) [8] onboard the ESA’s Trace Gas Orbiter (TGO) we discover vast tropical frost deposits on the Arsia (AM), Ascraeus (ASM) and Olympus Montes (OM) calderas. We confirm the detections in OM using a supporting observation from the High Resolution Stereo Camera (HRSC) [9] onboard the ESA’s Mars Express orbiter. Although our observations indicate that frost is present atop the tallest Tharsis volcanoes, slope streaks are absent in these regions. This suggests that the sublimation and condensation of frost may not be the primary cause of slope streak formation. To determine the composition of the observed frost deposits we have recently made joint observations with the Nadir and Occultation for MArs Discovery (NOMAD/TGO) team [10], which will be presented at the conference.

Item URL in elib:https://elib.dlr.de/196966/
Document Type:Conference or Workshop Item (Speech)
Title:Tropical Frost on Martian Volcanoes
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Valantinas, A.Physikalisches Institut, University of Bern, Sidlerstr. 5, CH-3012 Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Thomas, N.Physikalisches Institut, Universität Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Pommerol, A.Physikalisches Institut, Sidlerstrasse 5, University of Bern, CH-3012 Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Hauber, ErnstUNSPECIFIEDhttps://orcid.org/0000-0002-1375-304XUNSPECIFIED
Bickel, ValentinCenter for Space and Habitability, University of BernUNSPECIFIEDUNSPECIFIED
Schorghofer, NorbertPlanetary Science Institute, Tucson, AZ, USAUNSPECIFIEDUNSPECIFIED
Almeida, MiguelPhysikalisches Institut, Universität Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Read, M.R.Physikalisches Institut, Sidlerstrasse 5, University of Bern, CH-3012 Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Rangarajan, V.G.University of Western Ontario, London, ON, CanadaUNSPECIFIEDUNSPECIFIED
Munaretto, G.INAF Osservatorio Astronomico di Padova, Vic. Osservatorio 5, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Pajola, MINAF Osservatorio Astronomico di Padova, Vic. Osservatorio 5, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Re, CristinaINAF - Osservatorio Astronomico di Padova, Padova, ItalyUNSPECIFIEDUNSPECIFIED
Cremonese, GINAF Osservatorio Astronomico di Padova, Vic. Osservatorio 5, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:p. 1539
Series Name:LPI Contribution
Keywords:Mars, water, atmosphere, ice, frost, HRSC, CaSSIS
Event Title:54th Lunar and Planetary Science Conference 2023
Event Location:The Woodlands, TX (USA)
Event Type:international Conference
Event Dates:13.-17.03.2023
Organizer:Lunar and Planetary Institute
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Robotics
DLR - Research area:Raumfahrt
DLR - Program:R RO - Robotics
DLR - Research theme (Project):R - Planetary Exploration, R - Planetary Evolution and Life
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Hauber, Ernst
Deposited On:04 Sep 2023 09:25
Last Modified:04 Sep 2023 09:25

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.