Radar detection of subglacial water under the south polar cap of Mars: Where are we now?

2020 ◽  
Author(s):  
R. Orosei ◽  
G. Caprarelli ◽  
M. Cartacci ◽  
A. Cicchetti ◽  
B. Cosciotti ◽  
...  
Keyword(s):  
Radar Detection ◽  
Polar Cap ◽  
The South ◽  
South Polar

scholarly journals The Energy Budget of the Polar Atmosphere in MERRA

2012 ◽  
Vol 25 (1) ◽  
pp. 5-24 ◽  
Author(s):  
Richard I. Cullather ◽  
Michael G. Bosilovich
Keyword(s):  
Energy Budget ◽  
The Arctic ◽  
Polar Regions ◽  
Polar Cap ◽  
The South ◽  
Atmospheric Energy ◽  
In Situ Observations ◽  
Energy Convergence ◽  
South Polar

Abstract Components of the atmospheric energy budget from the Modern-Era Retrospective Analysis for Research and Applications (MERRA) are evaluated in polar regions for the period 1979–2005 and compared with previous estimates, in situ observations, and contemporary reanalyses. Closure of the budget is reflected by the analysis increments term, which indicates an energy surplus of 11 W m−2 over the North Polar cap (70°–90°N) and 22 W m−2 over the South Polar cap (70°–90°S). Total atmospheric energy convergence from MERRA compares favorably with previous studies for northern high latitudes but exceeds the available previous estimate for the South Polar cap by 46%. Discrepancies with the Southern Hemisphere energy transport are largest in autumn and may be related to differences in topography with earlier reanalyses. For the Arctic, differences between MERRA and other sources in top of atmosphere (TOA) and surface radiative fluxes are largest in May. These differences are concurrent with the largest discrepancies between MERRA parameterized and observed surface albedo. For May, in situ observations of the upwelling shortwave flux in the Arctic are 80 W m−2 larger than MERRA, while the MERRA downwelling longwave flux is underestimated by 12 W m−2 throughout the year. Over grounded ice sheets, the annual mean net surface energy flux in MERRA is erroneously nonzero. Contemporary reanalyses from the Climate Forecast Center (CFSR) and the Interim Re-Analyses of the European Centre for Medium-Range Weather Forecasts (ERA-I) are found to have better surface parameterizations; however, these reanalyses also disagree with observed surface and TOA energy fluxes. Discrepancies among available reanalyses underscore the challenge of reproducing credible estimates of the atmospheric energy budget in polar regions.

Perennial water ice identified in the south polar cap of Mars

Nature ◽  
2004 ◽  
Vol 428 (6983) ◽  
pp. 627-630 ◽  
Author(s):  
Jean-Pierre Bibring ◽  
Yves Langevin ◽  
François Poulet ◽  
Aline Gendrin ◽  
Brigitte Gondet ◽  
...  
Keyword(s):  
Polar Cap ◽  
The South ◽  
Water Ice ◽  
South Polar

Identification of radio sources in the south polar CAP

1979 ◽  
Vol 84 ◽  
pp. 718 ◽  
Author(s):  
C. Anguita ◽  
L. E. Campusano ◽  
C. Torres ◽  
M. Pedreros
Keyword(s):  
Radio Sources ◽  
Polar Cap ◽  
The South ◽  
South Polar

Variability of the south polar cap of Mars in Mars years 28 and 29

Icarus ◽  
2010 ◽  
Vol 208 (1) ◽  
pp. 82-85 ◽  
Author(s):  
P.B. James ◽  
P.C. Thomas ◽  
M.C. Malin
Keyword(s):  
Polar Cap ◽  
The South ◽  
South Polar

Observations of the south polar CAP of Mars at the opposition of 1892

1893 ◽  
Vol 13 ◽  
pp. 41
Author(s):  
George C. Comstock
Keyword(s):  
Polar Cap ◽  
The South ◽  
South Polar

scholarly journals Mariner 9 observations of the south polar cap of Mars: Evidence for residual CO2frost

1990 ◽  
Vol 95 (B2) ◽  
pp. 1319 ◽  
Author(s):  
D. A. Paige ◽  
K. E. Herkenhoff ◽  
B. C. Murray
Keyword(s):  
Polar Cap ◽  
The South ◽  
Mariner 9 ◽  
South Polar
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