urn:ieda:metadataabout:10.15784-600132
eng
dataset
Dataset
Interdisciplinary Earth Data Alliance
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2018-05-17
ISO 19139 Geographic Information - Metadata - Implementation Specification
2007
A New Approach to Investigate the Seismic Velocity Structure beneath Antarctica
2014
publication
doi:10.15784/600132
Hansen, Samantha
University of Alabama, Tuscaloosa, AL, 35487, US
shansen@geo.ua.edu
http://orcid.org/ORCID:0000-0001-7608-5715
ORCID
author
U.S. Antarctic Program (USAP) Data Center
publisher
Abstract: Intellectual Merit: Numerous candidate models for the geologic processes that have shaped the Antarctic continent have been proposed. To discriminate between them, detailed images of the upper mantle structure are required; however, the only existing continental-scale images of seismic structure beneath Antarctica lack sufficient resolution to delineate important, diagnostic features. Using newly available data from various Antarctic seismic networks, the PI will employ the adaptively parameterized tomography method to develop a high-resolution, continental-scale seismic velocity model for all of Antarctica. The proposed tomography method combines regional seismic travel-time datasets in the context of a global model to create a composite continental-scale model of upper mantle structure. The proposed method allows for imaging of finer structure in areas with better seismic ray coverage while simultaneously limiting the resolution of features in regions with less coverage. This research will help advance understanding of important global processes, such as craton formation, mountain building, continental rifting and associated magmatism. Additionally, the proposed research will have important impacts on other fields of Antarctic science. Constraints provided by tomographic results can be used to develop thermal models of the lithosphere needed to characterize the history and dynamics of ice sheets. Also, further constraints on lithospheric structure are required by climate-ice models, which are focused on understanding the cooling history of the Antarctic continent.
Broader impacts: The PI is a new faculty member at the University of Alabama after having been funded as a National Science Foundation Postdoctoral Fellow in Polar Regions Research. The graduate student supported by this project is new to polar research. Through the UA-Tuscaloosa Magnet School partnership program, the PI will educate K-12 students about the Antarctic environment and associated career opportunities through various online and hands-on activities. University of Alabama dedicates a significant percentage of its enrollment space to underrepresented groups.
funderName:NSF:GEO:PLR:Antarctic Earth Sciences
awardNumber:1139739
awardTitle:New Approach to Investigate the Seismic Velocity Structure beneath Antarctica
Complete
Hansen, Samantha
University of Alabama, Tuscaloosa, AL, 35487, US
http://orcid.org/ORCID:0000-0001-7608-5715
ORCID
pointOfContact
Seismic Tomography
data type
Antarctic Earth Sciences
program
Lithosphere
subject
Geology/Geophysics - Other
IEDA data type categories
IEDA integrated catalog keyword vocabulary
2017-10-11
creation
Antarctica
IEDA feature of interest
IEDA integrated catalog keyword vocabulary
2017-10-11
creation
Solid Earth
IEDA topic
IEDA integrated catalog keyword vocabulary
2017-10-11
creation
US Antarctic Program Data Center (USAP-DC)
Data Center
Creative Commons Attribution-NonCommercial-Share Alike 3.0 United States [CC BY-NC-SA 3.0]
Creative Commons Attribution-NonCommercial-Share Alike 3.0 United States [CC BY-NC-SA 3.0]
eng
geoscientificInformation
2012-01-01
2014-06-30
http://dx.doi.org/10.15784/600132
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http://www.usap-dc.org/view/dataset/600132
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This metadata record was generated by an xslt transformation from a DataCite metadata record; The transform was created by Damian Ulbricht and Stephen M. Richard. 2017-11-15 these records include new IEDA keywords for geoportal facets Run on 2018-06-21T19:05:24-07:00
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