منابع مشابه
Mars- Northern hemisphere slopes and slope distributions
We investigate slope distributions in the northern hemisphere of Mars from topographic profiles collected by the Mars Orbiter Laser Altimeter. Analysis of the region from about 12øS to 82øN, over diverse geologic units, indicates that the range of regional-scale slopes is small, generally < 3 ø. Surface smoothness is most distinctive in the vast northern hemisphere plains, where slopes are typi...
متن کاملTraveling waves in the Northern Hemisphere of Mars
[1] Analysis of temperature retrievals from Mars Global Surveyor Thermal Emission Spectrometer data has revealed the presence of regular, eastward propagating waves in the Northern Hemisphere. A large amplitude, zonal wave 1 with a long ( 20 sol) period is particularly prominent during early winter (Ls = 220–270 ). After Ls = 270 , a weaker and more rapidly propagating (6.5 sol period) zonal wa...
متن کاملShape of the northern hemisphere of Mars from the Mars Orbiter Laser Altimeter (MOLA)
Eighteen profiles of ∼N-S-trending topography from the Mars Orbiter Laser Altimeter (MOLA) are used to analyze the shape of Mars’ northern hemisphere. MOLA observations show smaller northern hemisphere flattening than previously thought. The hypsometric distribution is narrowly peaked with > 20% of the surface lying within 200 m of the mean elevation. Low elevation correlates with low surface r...
متن کاملTopography of the northern hemisphere of Mars from the Mars Orbiter Laser Altimeter.
The first 18 tracks of laser altimeter data across the northern hemisphere of Mars from the Mars Global Surveyor spacecraft show that the planet at latitudes north of 50 degrees is exceptionally flat; slopes and surface roughness increase toward the equator. The polar layered terrain appears to be a thick ice-rich formation with a non-equilibrium planform indicative of ablation near the periphe...
متن کاملDust storms originating in the northern hemisphere during the third mapping year of Mars Global Surveyor
Data from the third Mars Global Surveyor (MGS) mapping year (MY 26, 2003–2005) are used to investigate dust storms originating in the northern hemisphere. Flushing dust storms, which originate as frontal dust storms at the northern polar vortex edge and propagate southward through topographic channels, are observed immediately before and after a quiescent period that occurs around the northern ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1886
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/46.8.445