urn:ieda:metadataabout:10.15784-600146
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Dataset
Interdisciplinary Earth Data Alliance
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2018-05-17
ISO 19139 Geographic Information - Metadata - Implementation Specification
2007
Annual Satellite Era Accumulation Patterns Over WAIS Divide: A Study Using Shallow Ice Cores, Near-Surface Radars and Satellites
2015
publication
doi:10.15784/600146
Forster, Richard
University of Utah, Salt Lake City, UT, 84112, US
rick.forster@geog.utah.edu
author
U.S. Antarctic Program (USAP) Data Center
publisher
Abstract: This award supports a project to broaden the knowledge of annual accumulation patterns over the West Antarctic Ice Sheet by processing existing near-surface radar data taken on the US ITASE traverse in 2000 and by gathering and validating new ultra/super-high-frequency (UHF) radar images of near surface layers (to depths of ~15 m), expanding abilities to monitor recent annual accumulation patterns from point source ice cores to radar lines. Shallow (15 m) ice cores will be collected in conjunction with UHF radar images to confirm that radar echoed returns correspond with annual layers, and/or sub-annual density changes in the near-surface snow, as determined from ice core stable isotopes. This project will additionally improve accumulation monitoring from space-borne instruments by comparing the spatial-radar-derived-annual accumulation time series to the passive microwave time series dating back over 3 decades and covering most of Antarctica. The intellectual merit of this project is that mapping the spatial and temporal variations in accumulation rates over the Antarctic ice sheet is essential for understanding ice sheet responses to climate forcing. Antarctic precipitation rate is projected to increase up to 20% in the coming century from the predicted warming. Accumulation is a key component for determining ice sheet mass balance and, hence, sea level rise, yet our ability to measure annual accumulation variability over the past 5 decades (satellite era) is mostly limited to point-source ice cores. Developing a radar and ice core derived annual accumulation dataset will provide validation data for space-born remote sensing algorithms, climate models and, additionally, establish accumulation trends. The broader impacts of the project are that it will advance discovery and understanding within the climatology, glaciology and remote sensing communities by verifying the use of UHF radars to monitor annual layers as determined by visual, chemical and isotopic analysis from corresponding shallow ice cores and will provide a dataset of annual to near-annual accumulation measurements over the past ~5 decades across WAIS divide from existing radar data and proposed radar data. By determining if temporal changes in the passive microwave signal are correlated with temporal changes in accumulation will help assess the utility of passive microwave remote sensing to monitor accumulation rates over ice sheets for future decades. The project will promote teaching, training and learning, and increase representation of underrepresented groups by becoming involved in the NASA History of Winter project and Thermochron Mission and by providing K-12 teachers with training to monitor snow accumulation and temperature here in the US, linking polar research to the student's backyard. The project will train both undergraduate and graduate students in polar research and will encouraging young investigators to become involved in careers in science. In particular, two REU students will participate in original research projects as part of this larger project, from development of a hypothesis to presentation and publication of the results. The support of a new, young woman scientist will help to increase gender diversity in polar research.
funderName:NSF:GEO:PLR:Antarctic Glaciology
awardNumber:0944653
awardTitle:Collaborative Research: Annual satellite era accumulation patterns over WAIS Divide: A study using shallow ice cores, near-surface radars and satellites
Complete
Forster, Richard
University of Utah, Salt Lake City, UT, 84112, US
pointOfContact
Airborne Radar
method
Antarctic Glaciology
program
WAIS Divide Ice Core
project
Geology/Geophysics - Other
Glaciology
Radar
IEDA data type categories
IEDA integrated catalog keyword vocabulary
2017-10-11
creation
Antarctica
Glaciers/Ice Sheet
IEDA feature of interest
IEDA integrated catalog keyword vocabulary
2017-10-11
creation
Cryosphere
IEDA topic
IEDA integrated catalog keyword vocabulary
2017-10-11
creation
WAIS divide
place
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
WAIS divide
-119.4
-110
-80
-78.1
2010-08-01
2015-07-31
http://dx.doi.org/10.15784/600146
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http://www.usap-dc.org/view/dataset/600146
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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 2018-06-21T19:05:25-07:00
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