Long-Term and Inter-annual Mass Changes in the Iceland Ice Cap Determined From GRACE Gravity Using Slepian Functions
The Gravity Recovery and Climate Experiment (GRACE) satellites have measured anomalies in the Earth's time-variable gravity field since 2002, allowing for the measurement of the melting of glaciers due to climate change. Many techniques used with GRACE data have difficulty constraining mass cha...
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ftunivarizona:oai:repository.arizona.edu:10150/633691 2023-05-15T16:29:39+02:00 Long-Term and Inter-annual Mass Changes in the Iceland Ice Cap Determined From GRACE Gravity Using Slepian Functions von Hippel, Max Harig, Christopher Univ Arizona, Dept Math Univ Arizona, Dept Geosci 2019-07-04 http://hdl.handle.net/10150/633691 https://doi.org/10.3389/feart.2019.00171 en eng Frontiers Media SA von Hippel, M., & Harig, C. (2019). Long-term and inter-annual mass changes in the Iceland ice cap determined from GRACE gravity using Slepian functions. Frontiers in Earth Science, 7, 171. 2296-6463 doi:10.3389/feart.2019.00171 http://hdl.handle.net/10150/633691 FRONTIERS IN EARTH SCIENCE Copyright © 2019 von Hippel and Harig. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. CC-BY 7 GRACE Slepian Iceland mass loss ice gravity optimization Article 2019 ftunivarizona https://doi.org/10.3389/feart.2019.00171 2020-06-14T08:17:43Z The Gravity Recovery and Climate Experiment (GRACE) satellites have measured anomalies in the Earth's time-variable gravity field since 2002, allowing for the measurement of the melting of glaciers due to climate change. Many techniques used with GRACE data have difficulty constraining mass change in small regions, such as Iceland, often requiring broad averaging functions in order to capture trends. These techniques also capture data from nearby regions, causing signal leakage. Alternatively, Slepian functions may solve this problem by optimally concentrating data both in the spatial domain (e.g., Iceland) and spectral domain (i.e., the bandwidth of the data). We use synthetic experiments to show that Slepian functions can capture trends over Iceland without meaningful leakage and influence from ice changes in Greenland. We estimate a mass change over Iceland from GRACE data of approximately -9.3 ± 1.0 Gt/yr between March 2002 and November 2016, with an acceleration of 1.1 ± 0.5 Gt/yr2. NASA Space Grant Internship at the University of Arizona; TRIFF-WEES program at the University of Arizona Open access journal This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu. Article in Journal/Newspaper Greenland Ice cap Iceland The University of Arizona: UA Campus Repository Greenland Frontiers in Earth Science 7 |
institution |
Open Polar |
collection |
The University of Arizona: UA Campus Repository |
op_collection_id |
ftunivarizona |
language |
English |
topic |
GRACE Slepian Iceland mass loss ice gravity optimization |
spellingShingle |
GRACE Slepian Iceland mass loss ice gravity optimization von Hippel, Max Harig, Christopher Long-Term and Inter-annual Mass Changes in the Iceland Ice Cap Determined From GRACE Gravity Using Slepian Functions |
topic_facet |
GRACE Slepian Iceland mass loss ice gravity optimization |
description |
The Gravity Recovery and Climate Experiment (GRACE) satellites have measured anomalies in the Earth's time-variable gravity field since 2002, allowing for the measurement of the melting of glaciers due to climate change. Many techniques used with GRACE data have difficulty constraining mass change in small regions, such as Iceland, often requiring broad averaging functions in order to capture trends. These techniques also capture data from nearby regions, causing signal leakage. Alternatively, Slepian functions may solve this problem by optimally concentrating data both in the spatial domain (e.g., Iceland) and spectral domain (i.e., the bandwidth of the data). We use synthetic experiments to show that Slepian functions can capture trends over Iceland without meaningful leakage and influence from ice changes in Greenland. We estimate a mass change over Iceland from GRACE data of approximately -9.3 ± 1.0 Gt/yr between March 2002 and November 2016, with an acceleration of 1.1 ± 0.5 Gt/yr2. NASA Space Grant Internship at the University of Arizona; TRIFF-WEES program at the University of Arizona Open access journal This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu. |
author2 |
Univ Arizona, Dept Math Univ Arizona, Dept Geosci |
format |
Article in Journal/Newspaper |
author |
von Hippel, Max Harig, Christopher |
author_facet |
von Hippel, Max Harig, Christopher |
author_sort |
von Hippel, Max |
title |
Long-Term and Inter-annual Mass Changes in the Iceland Ice Cap Determined From GRACE Gravity Using Slepian Functions |
title_short |
Long-Term and Inter-annual Mass Changes in the Iceland Ice Cap Determined From GRACE Gravity Using Slepian Functions |
title_full |
Long-Term and Inter-annual Mass Changes in the Iceland Ice Cap Determined From GRACE Gravity Using Slepian Functions |
title_fullStr |
Long-Term and Inter-annual Mass Changes in the Iceland Ice Cap Determined From GRACE Gravity Using Slepian Functions |
title_full_unstemmed |
Long-Term and Inter-annual Mass Changes in the Iceland Ice Cap Determined From GRACE Gravity Using Slepian Functions |
title_sort |
long-term and inter-annual mass changes in the iceland ice cap determined from grace gravity using slepian functions |
publisher |
Frontiers Media SA |
publishDate |
2019 |
url |
http://hdl.handle.net/10150/633691 https://doi.org/10.3389/feart.2019.00171 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice cap Iceland |
genre_facet |
Greenland Ice cap Iceland |
op_source |
7 |
op_relation |
von Hippel, M., & Harig, C. (2019). Long-term and inter-annual mass changes in the Iceland ice cap determined from GRACE gravity using Slepian functions. Frontiers in Earth Science, 7, 171. 2296-6463 doi:10.3389/feart.2019.00171 http://hdl.handle.net/10150/633691 FRONTIERS IN EARTH SCIENCE |
op_rights |
Copyright © 2019 von Hippel and Harig. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2019.00171 |
container_title |
Frontiers in Earth Science |
container_volume |
7 |
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1766019364917608448 |