Separating Long-Term and Short-Term Mass Changes of Antarctic Ice Drainage Basins: A Coupled State Space Analysis of Satellite Observations and Model Products
Satellite gravimetry and altimetry measurements record gravity and elevation changes, respectively, which are useful for determining mass and volume change of the Antarctic Ice Sheet. Common methods employ products from regional climate modeling and firn modeling to aid interpretation and to link vo...
Published in: | Journal of Geophysical Research: Earth Surface |
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Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Online Access: | http://resolver.tudelft.nl/uuid:35d92117-c72c-4ae3-8750-65766b54ed5b https://doi.org/10.1029/2020JF005966 |
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fttudelft:oai:tudelft.nl:uuid:35d92117-c72c-4ae3-8750-65766b54ed5b 2024-02-11T09:57:32+01:00 Separating Long-Term and Short-Term Mass Changes of Antarctic Ice Drainage Basins: A Coupled State Space Analysis of Satellite Observations and Model Products Willen, M.O. (author) Broerse, T. (author) Groh, A. (author) Wouters, B. (author) Kuipers Munneke, P. (author) Horwath, M. (author) van den Broeke, M.R. (author) Schröder, L. (author) 2021 http://resolver.tudelft.nl/uuid:35d92117-c72c-4ae3-8750-65766b54ed5b https://doi.org/10.1029/2020JF005966 en eng http://www.scopus.com/inward/record.url?scp=85108604668&partnerID=8YFLogxK Journal of Geophysical Research: Earth Surface--2169-9003--09817ce3-bc06-41ae-8157-80cceb299ef7 http://resolver.tudelft.nl/uuid:35d92117-c72c-4ae3-8750-65766b54ed5b https://doi.org/10.1029/2020JF005966 © 2021 M.O. Willen, T. Broerse, A. Groh, B. Wouters, P. Kuipers Munneke, M. Horwath, M.R. van den Broeke, L. Schröder Antarctica GRACE mass changes satellite altimetry state space filtering journal article 2021 fttudelft https://doi.org/10.1029/2020JF005966 2024-01-24T23:31:58Z Satellite gravimetry and altimetry measurements record gravity and elevation changes, respectively, which are useful for determining mass and volume change of the Antarctic Ice Sheet. Common methods employ products from regional climate modeling and firn modeling to aid interpretation and to link volume changes to mass changes. Estimating deterministic parameters over defined time periods is a conventional way to evaluate those changes. To overcome limitations of deterministic analyses with respect to time-variable signals, we have developed a state-space model framework. Therein, we jointly evaluate four mass and volume data sets by coupling of temporal signal variations. We identify long-term signals of ice drainage basins that are observed by the satellite gravimetry mission GRACE and several satellite altimetry missions from April 2002 until August 2016. The degree to which we can separate long-term and short-term variations strongly depends on the similarity of the mass and volume change time series. For the drainage system of the Pine Island Glacier (West Antarctica), our results show noticeable variations of the long-term trend with an acceleration of the contribution of ice dynamics to the mass balance from −11 ± 8 to −58 ± 8 Gt a −1 . Our results in Dronning Maud Land (East Antarctica) show a positive long-term contribution to the mass balance at almost a constant rate. The presented approach can fit time-variable changes without artificial selection of periods of interest. Furthermore, because we only enforce common long-term time variations between mass and volume data, differences in mean trend rates help to uncover model discrepancies. Physical and Space Geodesy Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica Delft University of Technology: Institutional Repository Antarctic Dronning Maud Land East Antarctica Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) The Antarctic West Antarctica Journal of Geophysical Research: Earth Surface 126 6 |
institution |
Open Polar |
collection |
Delft University of Technology: Institutional Repository |
op_collection_id |
fttudelft |
language |
English |
topic |
Antarctica GRACE mass changes satellite altimetry state space filtering |
spellingShingle |
Antarctica GRACE mass changes satellite altimetry state space filtering Willen, M.O. (author) Broerse, T. (author) Groh, A. (author) Wouters, B. (author) Kuipers Munneke, P. (author) Horwath, M. (author) van den Broeke, M.R. (author) Schröder, L. (author) Separating Long-Term and Short-Term Mass Changes of Antarctic Ice Drainage Basins: A Coupled State Space Analysis of Satellite Observations and Model Products |
topic_facet |
Antarctica GRACE mass changes satellite altimetry state space filtering |
description |
Satellite gravimetry and altimetry measurements record gravity and elevation changes, respectively, which are useful for determining mass and volume change of the Antarctic Ice Sheet. Common methods employ products from regional climate modeling and firn modeling to aid interpretation and to link volume changes to mass changes. Estimating deterministic parameters over defined time periods is a conventional way to evaluate those changes. To overcome limitations of deterministic analyses with respect to time-variable signals, we have developed a state-space model framework. Therein, we jointly evaluate four mass and volume data sets by coupling of temporal signal variations. We identify long-term signals of ice drainage basins that are observed by the satellite gravimetry mission GRACE and several satellite altimetry missions from April 2002 until August 2016. The degree to which we can separate long-term and short-term variations strongly depends on the similarity of the mass and volume change time series. For the drainage system of the Pine Island Glacier (West Antarctica), our results show noticeable variations of the long-term trend with an acceleration of the contribution of ice dynamics to the mass balance from −11 ± 8 to −58 ± 8 Gt a −1 . Our results in Dronning Maud Land (East Antarctica) show a positive long-term contribution to the mass balance at almost a constant rate. The presented approach can fit time-variable changes without artificial selection of periods of interest. Furthermore, because we only enforce common long-term time variations between mass and volume data, differences in mean trend rates help to uncover model discrepancies. Physical and Space Geodesy |
format |
Article in Journal/Newspaper |
author |
Willen, M.O. (author) Broerse, T. (author) Groh, A. (author) Wouters, B. (author) Kuipers Munneke, P. (author) Horwath, M. (author) van den Broeke, M.R. (author) Schröder, L. (author) |
author_facet |
Willen, M.O. (author) Broerse, T. (author) Groh, A. (author) Wouters, B. (author) Kuipers Munneke, P. (author) Horwath, M. (author) van den Broeke, M.R. (author) Schröder, L. (author) |
author_sort |
Willen, M.O. (author) |
title |
Separating Long-Term and Short-Term Mass Changes of Antarctic Ice Drainage Basins: A Coupled State Space Analysis of Satellite Observations and Model Products |
title_short |
Separating Long-Term and Short-Term Mass Changes of Antarctic Ice Drainage Basins: A Coupled State Space Analysis of Satellite Observations and Model Products |
title_full |
Separating Long-Term and Short-Term Mass Changes of Antarctic Ice Drainage Basins: A Coupled State Space Analysis of Satellite Observations and Model Products |
title_fullStr |
Separating Long-Term and Short-Term Mass Changes of Antarctic Ice Drainage Basins: A Coupled State Space Analysis of Satellite Observations and Model Products |
title_full_unstemmed |
Separating Long-Term and Short-Term Mass Changes of Antarctic Ice Drainage Basins: A Coupled State Space Analysis of Satellite Observations and Model Products |
title_sort |
separating long-term and short-term mass changes of antarctic ice drainage basins: a coupled state space analysis of satellite observations and model products |
publishDate |
2021 |
url |
http://resolver.tudelft.nl/uuid:35d92117-c72c-4ae3-8750-65766b54ed5b https://doi.org/10.1029/2020JF005966 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic Dronning Maud Land East Antarctica Pine Island Glacier The Antarctic West Antarctica |
geographic_facet |
Antarctic Dronning Maud Land East Antarctica Pine Island Glacier The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica |
op_relation |
http://www.scopus.com/inward/record.url?scp=85108604668&partnerID=8YFLogxK Journal of Geophysical Research: Earth Surface--2169-9003--09817ce3-bc06-41ae-8157-80cceb299ef7 http://resolver.tudelft.nl/uuid:35d92117-c72c-4ae3-8750-65766b54ed5b https://doi.org/10.1029/2020JF005966 |
op_rights |
© 2021 M.O. Willen, T. Broerse, A. Groh, B. Wouters, P. Kuipers Munneke, M. Horwath, M.R. van den Broeke, L. Schröder |
op_doi |
https://doi.org/10.1029/2020JF005966 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
126 |
container_issue |
6 |
_version_ |
1790593069642416128 |