scholarly journals Ceres: Predictions for near-surface water ice stability and implications for plume generating processes

2015 ◽  
Vol 42 (7) ◽  
pp. 2130-2136 ◽  
Author(s):  
Timothy N. Titus
Keyword(s):  
Surface Water ◽  
Near Surface ◽  
Water Ice

scholarly journals Replenishment of near‐surface water ice by impacts into Ceres’ volatile‐rich crust: Observations by Dawn’s Gamma Ray and Neutron Detector

2021 ◽  
Author(s):  
T. H. Prettyman ◽  
N. Yamashita ◽  
M. E. Landis ◽  
J. C. Castillo‐Rogez ◽  
N. Schörghofer ◽  
...  
Keyword(s):  
Surface Water ◽  
Neutron Detector ◽  
Gamma Ray ◽  
Near Surface ◽  
Water Ice

Erratum to “Mars low-latitude neutron distribution: Possible remnant near-surface water ice and a mechanism for its recent emplacement” [Icarus 175 (2005) 58–67]

Icarus ◽  
2005 ◽  
Vol 178 (1) ◽  
pp. 291-293 ◽  
Author(s):  
Bruce M. Jakosky ◽  
Michael T. Mellon ◽  
E. Stacy Varnes ◽  
William C. Feldman ◽  
William V. Boynton ◽  
...  
Keyword(s):  
Surface Water ◽  
Neutron Distribution ◽  
Low Latitude ◽  
Near Surface ◽  
Water Ice

Mars low-latitude neutron distribution: Possible remnant near-surface water ice and a mechanism for its recent emplacement

Icarus ◽  
2005 ◽  
Vol 175 (1) ◽  
pp. 58-67 ◽  
Author(s):  
B JAKOSKY ◽  
M MELLON ◽  
E VARNES ◽  
W FELDMAN ◽  
W BOYNTON ◽  
...  
Keyword(s):  
Surface Water ◽  
Neutron Distribution ◽  
Low Latitude ◽  
Near Surface ◽  
Water Ice

Replenishment of near-surface water ice by impacts into Ceres' volatile-rich crust: Observations by Dawn's Gamma Ray and Neutron Detector

2021 ◽  
Author(s):  
Thomas H. Prettyman ◽  
Naoyuki Yamashita ◽  
Margaret E Landis ◽  
Julie C Castillo-Rogez ◽  
Norbert Schorghofer ◽  
...  
Keyword(s):  
Surface Water ◽  
Neutron Detector ◽  
Gamma Ray ◽  
Near Surface ◽  
Water Ice

Impact-Induced Melting of Near-Surface Water Ice on Mars

2004 ◽  
Author(s):  
Sarah T. Stewart
Keyword(s):  
Surface Water ◽  
Near Surface ◽  
Water Ice

scholarly journals An evaluation of water quality at Sandhill Wetland: implications for reclaiming wetlands above soft tailings deposits in northern Alberta, Canada

2021 ◽  
Author(s):  
Jeremy A. Hartsock ◽  
Jessica Piercey ◽  
Melissa K. House ◽  
Dale H. Vitt
Keyword(s):  
Water Quality ◽  
Electrical Conductivity ◽  
Surface Water ◽  
Water Chemistry ◽  
Water Quality Monitoring ◽  
Total Alkalinity ◽  
Near Surface ◽  
Water Quality Guidelines ◽  
Quality Guidelines ◽  
Annual Water

AbstractThe experimental Sandhill Wetland is the first permanent reclamation of a composite tailings deposit, and annual water quality monitoring is of specific interest for evaluating and predicting long-term reclamation performance. Here, we present water chemistry monitoring data obtained from Sandhill Wetland (years 2009–2019) and compare results to twelve natural reference wetlands and to environmental quality guidelines for Alberta surface waters. By comparing water quality at Sandhill Wetland and natural sites to established guidelines, we can begin to document the natural background water quality of wetlands in the region and examine if guideline exceedances are seen in natural undisturbed environments, or appear only at active reclamation sites. At Sandhill Wetland the dominant ions in near-surface water were bicarbonate, sulfate, chloride, sodium, calcium, and magnesium. Since the first growing season concentrations for these ions have increased annually, causing concurrent increases in electrical conductivity. In year 2019, water chemistry at Sandhill Wetland was most comparable to regional saline fens, systems that exhibit elevated electrical conductivity and high sodicity. Near-surface water at Sandhill Wetland exceeded water quality guidelines for three substances/properties (dissolved chloride, iron, and total alkalinity) in the most recent year of monitoring. The saline fen natural sites also exceeded water quality guidelines for the same chemical substances/properties, suggesting guideline exceedances are a norm for some natural wetland site types in the region. Of note, in each year of monitoring at Sandhill Wetland, dissolved organic compounds evaluated in sub- and near-surface water were below detection limits.

scholarly journals The composition of Europa's near-surface atmosphere

2008 ◽  
Vol 4 (S251) ◽  
pp. 327-328
Author(s):  
Mau C. Wong ◽  
Tim Cassidy ◽  
Robert E. Johnson
Keyword(s):  
Solar System ◽  
Surface Composition ◽  
Near Surface ◽  
Water Ice ◽  
Model Studies ◽  
Surface Atmosphere ◽  
Jovian Magnetosphere ◽  
Ice Surface ◽  
Geophysical Phenomenon ◽  
Inorganic Species

AbstractThe presence of an undersurface ocean renders Europa as one of the few planetary bodies in our Solar System that has been conjectured to have possibly harbored life. Some of the organic and inorganic species present in the ocean underneath are expected to transport upwards through the relatively thin ice crust and manifest themselves as impurities of the water ice surface. For this reason, together with its unique dynamic atmosphere and geological features, Europa has attracted strong scientific interests in past decades.Europa is imbedded inside the Jovian magnetosphere, and, therefore, is constantly subjected to the immerse surrounding radiations, similar to the other three Galilean satellites. The magnetosphere-atmosphere-surface interactions form a complex system that provides a multitude of interesting geophysical phenomenon that is unique in the Solar System. The atmosphere of Europa is thought to have created by, mostly, charged particles sputtering of surface materials. Consequently, the study of Europa's atmosphere can be used as a tool to infer the surface composition. In this paper, we will discuss our recent model studies of Europa's near-surface atmosphere. In particular, the abundances and distributions of the dominant O2 and H2O species, and of other organic and inorganic minor species will be addressed.

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