GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland

Oliver Baur; Michael Kuhn; Will E. Featherstone

doi:10.1007/978-3-642-22078-4_57

GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland

Oliver Baur, Michael Kuhn, Will E. Featherstone

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

2 Citations (Scopus)

Abstract

In the past, GRACE (Gravity Recovery And Climate Experiment) monthly gravity field solutions have mainly been exploited to derive secular and seasonal mass changes on the Earth's surface. After seven years in operational mode, the satellite mission makes accelerated and decelerated mass variations detectable. Here we investigate the temporal characteristics of secular trends by fitting both linear and higher-order polynomials to the mass-change time-series. Our findings have been derived from GRACE gravity field time-series provided by CSR, GFZ and JPL. As a case study, we look at recent ice-mass variations over Greenland. Based on various model selection criteria (Akaike and Bayesian information criterion, cross-validation, hypotheses testing), our investigations show that linear regression is unable to describe recent deglaciation. Instead, the secular trend is best represented by a second-order polynomial, confirming accelerated deglaciation of the Greenland ice sheets, which increased by 250% between April 2002 and March 2009.

Original language	English
Title of host publication	VII Hotine-Marussi Symposium on Mathematical Geodesy: Proceedings of the Symposium
Editors	Nico Sneeuw, Pavel Novak, Mattia Crespi, Fernando Sanso
Place of Publication	Crete
Publisher	Springer
Pages	381-386
Number of pages	6
Volume	137
ISBN (Print)	9783642220777
DOIs	https://doi.org/10.1007/978-3-642-22078-4_57
Publication status	Published - 2012
Externally published	Yes
Event	7th Hotine-Marussi Symposium on Mathematical Geodesy - Rome, Italy Duration: 6 Jun 2009 → 6 Jun 2009 Conference number: 7

Publication series

Name	International Association of Geodesy Symposia

Conference

Conference	7th Hotine-Marussi Symposium on Mathematical Geodesy
Country/Territory	Italy
City	Rome
Period	6/06/09 → 6/06/09

Access to Document

10.1007/978-3-642-22078-4_57

Cite this

Baur, O., Kuhn, M., & Featherstone, W. E. (2012). GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland. In N. Sneeuw, P. Novak, M. Crespi, & F. Sanso (Eds.), VII Hotine-Marussi Symposium on Mathematical Geodesy: Proceedings of the Symposium (Vol. 137, pp. 381-386). (International Association of Geodesy Symposia). Springer. https://doi.org/10.1007/978-3-642-22078-4_57

Baur, Oliver ; Kuhn, Michael ; Featherstone, Will E. / GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland. VII Hotine-Marussi Symposium on Mathematical Geodesy: Proceedings of the Symposium. editor / Nico Sneeuw ; Pavel Novak ; Mattia Crespi ; Fernando Sanso. Vol. 137 Crete : Springer, 2012. pp. 381-386 (International Association of Geodesy Symposia).

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title = "GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland",

abstract = "In the past, GRACE (Gravity Recovery And Climate Experiment) monthly gravity field solutions have mainly been exploited to derive secular and seasonal mass changes on the Earth's surface. After seven years in operational mode, the satellite mission makes accelerated and decelerated mass variations detectable. Here we investigate the temporal characteristics of secular trends by fitting both linear and higher-order polynomials to the mass-change time-series. Our findings have been derived from GRACE gravity field time-series provided by CSR, GFZ and JPL. As a case study, we look at recent ice-mass variations over Greenland. Based on various model selection criteria (Akaike and Bayesian information criterion, cross-validation, hypotheses testing), our investigations show that linear regression is unable to describe recent deglaciation. Instead, the secular trend is best represented by a second-order polynomial, confirming accelerated deglaciation of the Greenland ice sheets, which increased by 250% between April 2002 and March 2009.",

keywords = "Ice-mass balance, Information criteria, Satellite gravimetry, Time-series, Trend estimation",

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Baur, O, Kuhn, M & Featherstone, WE 2012, GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland. in N Sneeuw, P Novak, M Crespi & F Sanso (eds), VII Hotine-Marussi Symposium on Mathematical Geodesy: Proceedings of the Symposium. vol. 137, International Association of Geodesy Symposia, Springer, Crete, pp. 381-386, 7th Hotine-Marussi Symposium on Mathematical Geodesy, Rome, Italy, 6/06/09. https://doi.org/10.1007/978-3-642-22078-4_57

GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland. / Baur, Oliver; Kuhn, Michael; Featherstone, Will E.
VII Hotine-Marussi Symposium on Mathematical Geodesy: Proceedings of the Symposium. ed. / Nico Sneeuw; Pavel Novak; Mattia Crespi; Fernando Sanso. Vol. 137 Crete: Springer, 2012. p. 381-386 (International Association of Geodesy Symposia).

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

TY - GEN

T1 - GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland

AU - Baur, Oliver

AU - Kuhn, Michael

AU - Featherstone, Will E.

N1 - Conference code: 7

PY - 2012

Y1 - 2012

N2 - In the past, GRACE (Gravity Recovery And Climate Experiment) monthly gravity field solutions have mainly been exploited to derive secular and seasonal mass changes on the Earth's surface. After seven years in operational mode, the satellite mission makes accelerated and decelerated mass variations detectable. Here we investigate the temporal characteristics of secular trends by fitting both linear and higher-order polynomials to the mass-change time-series. Our findings have been derived from GRACE gravity field time-series provided by CSR, GFZ and JPL. As a case study, we look at recent ice-mass variations over Greenland. Based on various model selection criteria (Akaike and Bayesian information criterion, cross-validation, hypotheses testing), our investigations show that linear regression is unable to describe recent deglaciation. Instead, the secular trend is best represented by a second-order polynomial, confirming accelerated deglaciation of the Greenland ice sheets, which increased by 250% between April 2002 and March 2009.

AB - In the past, GRACE (Gravity Recovery And Climate Experiment) monthly gravity field solutions have mainly been exploited to derive secular and seasonal mass changes on the Earth's surface. After seven years in operational mode, the satellite mission makes accelerated and decelerated mass variations detectable. Here we investigate the temporal characteristics of secular trends by fitting both linear and higher-order polynomials to the mass-change time-series. Our findings have been derived from GRACE gravity field time-series provided by CSR, GFZ and JPL. As a case study, we look at recent ice-mass variations over Greenland. Based on various model selection criteria (Akaike and Bayesian information criterion, cross-validation, hypotheses testing), our investigations show that linear regression is unable to describe recent deglaciation. Instead, the secular trend is best represented by a second-order polynomial, confirming accelerated deglaciation of the Greenland ice sheets, which increased by 250% between April 2002 and March 2009.

KW - Ice-mass balance

KW - Information criteria

KW - Satellite gravimetry

KW - Time-series

KW - Trend estimation

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M3 - Conference paper

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SN - 9783642220777

VL - 137

T3 - International Association of Geodesy Symposia

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EP - 386

BT - VII Hotine-Marussi Symposium on Mathematical Geodesy: Proceedings of the Symposium

A2 - Sneeuw, Nico

A2 - Novak, Pavel

A2 - Crespi, Mattia

A2 - Sanso, Fernando

PB - Springer

CY - Crete

T2 - 7th Hotine-Marussi Symposium on Mathematical Geodesy

Y2 - 6 June 2009 through 6 June 2009

ER -

Baur O, Kuhn M, Featherstone WE. GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland. In Sneeuw N, Novak P, Crespi M, Sanso F, editors, VII Hotine-Marussi Symposium on Mathematical Geodesy: Proceedings of the Symposium. Vol. 137. Crete: Springer. 2012. p. 381-386. (International Association of Geodesy Symposia). doi: 10.1007/978-3-642-22078-4_57

GRACE-Derived Linear and Non-linear Secular Mass Variations Over Greenland

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