Reiss, Dennis and Hoffmann, Harald and Scholten, Frank and Hiesinger, Harald and Matz, Klaus-Dieter and Neukum, Gerhard (2008) Summer observations of the Martian north polar residual cap by the High Resolution Stereo Camera (HRSC) in 2004/2005 and 2006. In: Lunar and Planetary Science XXXIX, 1391. Lunar and Planetary Institute. 39th Lunar and Planetary Science Conference, 2008-03-10 - 2008-03-14, League City, Texas, USA. ISSN 1540-7845.
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Official URL: http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1858.pdf
Abstract
Monitoring the polar caps is impor- tant for understanding the current climate on Mars. The northern residual cap (NRC) is an important source of atmospheric water vapour and it is unclear if there is a net sublimation or deposition of water va- pour under present climatic conditions. The recession of the seasonal polar cap in spring uncovers the bright NRC, which is composed of H2O ice. First obser- vations suggested interannual changes of the NRC in extent. Bass et al showed that these observed changes are most likely due to seasonal variations. Detailed examination of the interior cap showed that the albedo varies spatially but is generally repeatable interannually. Hyperspectral data from OMEGA acquired between LS ~93° and ~127° in 2004/2005 revealed that the albedo decrease on the polar cap is due to the sublimation of fine-grained frost which ex- poses older large-grained ice. In outlying regions, dominated by large-grained ice, the albedo increases with time. We tracked the seasonal and possible interannual albedo changes of the NRC using the Lambert albedo derived from High Resolution Stereo Camera (HRSC) image data of the summer seasons 2004/2005 (LS ~120°-~160°) and 2006 (LS ~90°- ~150).
Item URL in elib: | https://elib.dlr.de/67519/ | ||||||||||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Poster) | ||||||||||||||||||||||||||||
Title: | Summer observations of the Martian north polar residual cap by the High Resolution Stereo Camera (HRSC) in 2004/2005 and 2006 | ||||||||||||||||||||||||||||
Authors: |
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Date: | 2008 | ||||||||||||||||||||||||||||
Journal or Publication Title: | Lunar and Planetary Science XXXIX | ||||||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||||||||||
Volume: | 1391 | ||||||||||||||||||||||||||||
Publisher: | Lunar and Planetary Institute | ||||||||||||||||||||||||||||
Series Name: | LPI Contribution | ||||||||||||||||||||||||||||
ISSN: | 1540-7845 | ||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||
Keywords: | HRSC, Mars, North polar residual cap | ||||||||||||||||||||||||||||
Event Title: | 39th Lunar and Planetary Science Conference | ||||||||||||||||||||||||||||
Event Location: | League City, Texas, USA | ||||||||||||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||||||||||||
Event Start Date: | 10 March 2008 | ||||||||||||||||||||||||||||
Event End Date: | 14 March 2008 | ||||||||||||||||||||||||||||
Organizer: | Lunar and Planetary Institute | ||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||||||||||||||||||||||||
HGF - Program: | Space (old) | ||||||||||||||||||||||||||||
HGF - Program Themes: | W EW - Erforschung des Weltraums | ||||||||||||||||||||||||||||
DLR - Research area: | Space | ||||||||||||||||||||||||||||
DLR - Program: | W EW - Erforschung des Weltraums | ||||||||||||||||||||||||||||
DLR - Research theme (Project): | W - Projekt MARS-EXPRESS / HRSC (old) | ||||||||||||||||||||||||||||
Location: | Berlin-Adlershof | ||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Planetary Research | ||||||||||||||||||||||||||||
Deposited By: | Scholten, Dipl.-Ing. Frank | ||||||||||||||||||||||||||||
Deposited On: | 06 Jan 2011 13:41 | ||||||||||||||||||||||||||||
Last Modified: | 24 Apr 2024 19:32 |
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