Ice degradation and Boulder size frequency distribution analysis of the fresh Martian crater S1094b DOI Creative Commons
Filippo Tusberti, M. Pajola, Giovanni Munaretto

и другие.

Icarus, Год журнала: 2024, Номер 423, С. 116255 - 116255

Опубликована: Авг. 12, 2024

S1094b is the largest (155 m-size) and southernmost known ice-exposing fresh crater discovered so far on Mars, revealing a relatively pure unstable subsurface ice deposit located at northern Martian mid-latitudes. In this work, we analyze HiRISE images taken 27 February 2022 5 December to perform multi-temporal analysis of its ice-rich ejecta, combining with geologic mapping, boulder size frequency distribution (SFD) thermal modeling. The objective provide multidisciplinary characterization both impact subsequent exposed sublimation processes. SFD cases show power-law best fit indices −4.68 ± 0.15 − 3.47 0.10, respectively. same timeframe, density boulders per km2 ≥ 1.5 m changes from 3908, 596. This flattening mainly due consequent loss smaller-size icy boulders. confirmed by volume computation performed area, which changed ∼20,274 3997 m3 ∼7951 1117 m3, i.e. decrease ∼60% in 274 Sols. models showed that region always unstable, leading total 6504.71 hours estimated rate ∼0.15 0.04 mm/h (i.e. ∼3.60 0.96 mm/Sol). presence amount accessible such low latitudes could be valuable resource for potential future human missions.

Язык: Английский

Widespread pseudo-perennial water ice patches at high northern latitudes on Mars DOI
C. M. Dundas, M. T. Mellon, Aditya Khuller

и другие.

Icarus, Год журнала: 2025, Номер unknown, С. 116689 - 116689

Опубликована: Июнь 1, 2025

Язык: Английский

Процитировано

0
New, dated small impacts on the South Polar Layered Deposits (SPLD), Mars, and implications for shallow subsurface properties DOI
M. E. Landis, C. M. Dundas, A. S. McEwen

и другие.

Icarus, Год журнала: 2024, Номер 419, С. 115977 - 115977

Опубликована: Янв. 28, 2024

Язык: Английский

Процитировано

2
MRO overview: Sixteen years in Mars orbit DOI Creative Commons
Richard W. Zurek, L. K. Tamppari,

M. Dan Johnston

и другие.

Icarus, Год журнала: 2024, Номер 419, С. 116102 - 116102

Опубликована: Май 22, 2024

Launched on August 12, 2005, the Mars Reconnaissance Orbiter (MRO) entered orbit March 10, 2006. Following a period of aerobraking, MRO completed its entry into primary science in September 2006, initiating program systematic observations that still continues. Five providers, including Italian Space Agency, provided 6 instruments for flight, observing surface, atmosphere, and subsurface with greater spatial resolution coverage than ever before. Two investigations utilized spacecraft accelerometers tracking orbiter via Deep Network to study upper atmosphere densities gravity field planet. The data acquired by have revealed dynamic planet whose change from an ancient wetter climate drier today was complex transition not simple "drying out". Furthermore, continues even today. diversity early habitable environments, ice ages recorded polar cap layering deposits, repeating patterns dust storms, revelation new features at limit are all part scientific return during nearly decade years. story mission, evolution capabilities, contributions our current understanding subject two dozen papers Icarus special issue, MRO: Sixteen Years Observing Changing Mars. Three describe more detail instrument operations products over mission; several analysis techniques radar, construction 3-dimensional views, atmospheric sounder, enabling better retrievals dusty lower atmosphere. Other report recent research including, but limited to, dune movement, roles water carbon dioxide surface change, attempts understand formation fading enigmatic recurring slope lineae. This paper describes general aspects spacecraft, payload, mission as context issue papers; it also summarizes results support events phase basis give time history discovery effort.

Язык: Английский

Процитировано

2
Ice degradation and Boulder size frequency distribution analysis of the fresh Martian crater S1094b DOI Creative Commons
Filippo Tusberti, M. Pajola, Giovanni Munaretto

и другие.

Icarus, Год журнала: 2024, Номер 423, С. 116255 - 116255

Опубликована: Авг. 12, 2024

S1094b is the largest (155 m-size) and southernmost known ice-exposing fresh crater discovered so far on Mars, revealing a relatively pure unstable subsurface ice deposit located at northern Martian mid-latitudes. In this work, we analyze HiRISE images taken 27 February 2022 5 December to perform multi-temporal analysis of its ice-rich ejecta, combining with geologic mapping, boulder size frequency distribution (SFD) thermal modeling. The objective provide multidisciplinary characterization both impact subsequent exposed sublimation processes. SFD cases show power-law best fit indices −4.68 ± 0.15 − 3.47 0.10, respectively. same timeframe, density boulders per km2 ≥ 1.5 m changes from 3908, 596. This flattening mainly due consequent loss smaller-size icy boulders. confirmed by volume computation performed area, which changed ∼20,274 3997 m3 ∼7951 1117 m3, i.e. decrease ∼60% in 274 Sols. models showed that region always unstable, leading total 6504.71 hours estimated rate ∼0.15 0.04 mm/h (i.e. ∼3.60 0.96 mm/Sol). presence amount accessible such low latitudes could be valuable resource for potential future human missions.

Язык: Английский

Процитировано

0