Browsing Earth and Space Sciences, Department of by Issue Date
Now showing items 1-20 of 22
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Hydrohalite in cold sea ice: Laboratory observations of single crystals, surface accumulations, and migration rates under a temperature gradient, with application to “Snowball Earth"
(Journal of Geophysical Research, 2009)When NaCl precipitates out of a saturated solution, it forms anhydrous crystals of halite at temperatures above +0.11?C, but at temperatures below this threshold it instead precipitates as the dihydrate ‘‘hydrohalite,’’ ... -
Effects of bubbles, cracks, and volcanic tephra on the spectral albedo of bare ice near the Transantarctic Mountains: Implications for sea glaciers on Snowball Earth
(Journal of Geophysical Research: Earth Surface, 2013)Spectral albedo was measured along a 6 km transect near the Allan Hills in East Antarctica. The transect traversed the sequence from new snow through old snow, firn, and white ice, to blue ice, showing a systematic progression ... -
Tsunami Hazard Assessment of the Ocosta School Site in Westport, WA
(2013-09-11)The Westport Ocosta School District is proposing the construction of a new building to replace the current Ocosta Elementary School (Educational Service District 112, 2012). Since the Walsh et al. (2000) study, there have ... -
Refugium for surface life on Snowball Earth in a nearly enclosed sea? A numerical solution for sea-glacier invation through a narrow strait
(Journal of Geophysical Research: Oceans, 2014)Abstract Where photosynthetic eukaryotic organisms survived during the Snowball Earth events of the Neoproterozoic remains unclear. Our previous research tested whether a narrow arm of the ocean, similar to the modern ... -
Probabilistic Tsunami Hazard Assessment (PTHA) for Crescent City, CA
(2014-09-11)This report builds on and supercedes Phase I of a demonstration Probabilistic Tsunami Hazard Assessment (PTHA) study of Crescent City, California [23], which developed an improved methodology for PTHA and associated ... -
“Albedo dome”: a method for measuring spectral flux-reflectance in a laboratory for media with long optical paths
(Applied Optics, 2015)A method is presented for accurate measurement of spectral flux-reflectance (albedo) in a laboratory, for media with long optical path lengths, such as snow and ice. The approach uses an acrylic hemispheric dome, which, ... -
The spectral albedo of sea ice and salt crusts on the tropical ocean of Snowball Earth: II. Optical modeling
(Journal of Geophysical Research: Oceans, 2016)During the Snowball Earth events of the Neoproterozoic, tropical regions of the ocean could have developed a precipitated salt lag deposit left behind by sublimating sea ice. The major salt would have been hydrohalite, ... -
Decoding ice sheet behavior using englacial layer slopes - Supporting Data
(Geophysical Research Letters - AGU, 2017-05-09)This archive contains radar data referenced in the paper "Decoding ice sheet behavior using englacial layer slopes", published in the journal Geophysical Research Letters. -
Challenges and opportunities for research in tectonics: Understanding deformation and the processes that link Earth systems, from geologic time to human time. A community vision document submitted to the U.S. National Science Foundation.
(University of Washington, 2018)Geoscience is an inherently interdisciplinary endeavor, and one of the most interdisciplinary geosciences is tectonics. Embracing experimental, observational, and theoretical perspectives, tectonics focuses on the interactions ... -
Long Beach Berm Modeling Study
(2018-03-28)A berm design was developed for compatibility with guidelines published by the Federal Emergency Management Agency (FEMA) for vertical evacuation structures; the design utilized the maximum flooding depth results of a ... -
Persistent Tracers of Historic Ice Flow in Glacial Stratigraphy near Kamb Ice Stream, West Antarctica - Supporting Data
(2018-08-05)This archive contains radar data referenced in the paper "Persistent Tracers of Historic Ice Flow in Glacial Stratigraphy near Kamb Ice Stream, West Antarctica", published in the journal The Cryosphere in 2018. -
Quantitative High-Resolution Re-Examination of a Hypothesized Ocean Shoreline in Cydonia Mensae on Mars
(2018-09-24)Dataset in support of research submitted to the Journal of Geophysical Research: Planets. -
Linking postglacial landscapes to glacier dynamics using swath radar at Thwaites Glacier, Antarctica - Supporting Data
(2019)This archive contains profile and gridded radar data referenced in the paper "Linking postglacial landscapes to glacier dynamics using swath radar at Thwaites Glacier, Antarctica", published in the journal Geology in 2019. -
Thermal Weakening, Convergent Flow, and Vertical Heat Transport in the Northeast Greenland Ice Stream Shear Margins - Supporting Data
(2019-06-27)This archive contains radar data and model output referenced in the paper "Thermal Weakening, Convergent Flow, and Vertical Heat Transport in the Northeast Greenland Ice Stream Shear Margins", published in the journal ... -
Ice-sheet height and thickness changes from ICESat to ICESat-2.
(2020)These data represent ice-column thickness-change-rate estimates based on data from NASA's ICESat and ICESat-2 satellites. These data aided the first estimates of ice-sheet mass change from these two missions, spanning the ... -
Preliminary Modeling Study of a Vertical Evacuation Structure Site for the Aberdeen School District
(2020-02)A Maximum Considered Tsunami (MCT) scenario was developed for a magnitude 9 tsunamigenic earthquake on the Cascadia Subduction Zone. The development of this MCT scenario is compliant with our current understanding of the ... -
Modeling Study of a Proposed Vertical Evacuation Structure Site for the Shoalwater Bay Tribe Final Project Report
(2020-02)A Maximum Considered Tsunami (MCT) scenario was developed that includes projected sea level rise of 0.47 m over 75 years and a magnitude 9 tsunamigenic earthquake on the Cascadia Subduction Zone; development of the scenario ... -
gnss-ir derived accumulation history at the GNSS sites LTHW, UTHW, and KHLR maintained by unavco and the polenet team.
(2022-05-17)Accumulation time series were determined using GNSS interferometric reflectometry and MCMC inverse methods. Sites include KHLR, LTHW, and UTHW long-term GNSS stations on the Thwaites and Kohler glaciers. Included are the ...