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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ftdoajarticles:oai:doaj.org/article:8458b4ffbc8443bc9fa99902ec5bc44a 2023-05-15T16:29:05+02:00 Long-Term and Inter-annual Mass Changes in the Iceland Ice Cap Determined From GRACE Gravity Using Slepian Functions Max von Hippel Christopher Harig 2019-07-01T00:00:00Z https://doi.org/10.3389/feart.2019.00171 https://doaj.org/article/8458b4ffbc8443bc9fa99902ec5bc44a EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/feart.2019.00171/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2019.00171 https://doaj.org/article/8458b4ffbc8443bc9fa99902ec5bc44a Frontiers in Earth Science, Vol 7 (2019) GRACE Slepian Iceland mass loss ice gravity Science Q article 2019 ftdoajarticles https://doi.org/10.3389/feart.2019.00171 2022-12-31T03:44:28Z 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. Article in Journal/Newspaper Greenland Ice cap Iceland Directory of Open Access Journals: DOAJ Articles Greenland Frontiers in Earth Science 7 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
GRACE Slepian Iceland mass loss ice gravity Science Q |
spellingShingle |
GRACE Slepian Iceland mass loss ice gravity Science Q Max von Hippel Christopher Harig 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 Science Q |
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. |
format |
Article in Journal/Newspaper |
author |
Max von Hippel Christopher Harig |
author_facet |
Max von Hippel Christopher Harig |
author_sort |
Max von Hippel |
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 S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/feart.2019.00171 https://doaj.org/article/8458b4ffbc8443bc9fa99902ec5bc44a |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice cap Iceland |
genre_facet |
Greenland Ice cap Iceland |
op_source |
Frontiers in Earth Science, Vol 7 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/feart.2019.00171/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2019.00171 https://doaj.org/article/8458b4ffbc8443bc9fa99902ec5bc44a |
op_doi |
https://doi.org/10.3389/feart.2019.00171 |
container_title |
Frontiers in Earth Science |
container_volume |
7 |
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1766018766289764352 |