GRACE estimates of sea surface height anomalies in the Gulf of Carpentaria, Australia

Paul Tregoning; Kurt Lambeck; Guillaume Ramillien

doi:10.1016/j.epsl.2008.04.018

GRACE estimates of sea surface height anomalies in the Gulf of Carpentaria, Australia

Paul Tregoning^*, Kurt Lambeck, Guillaume Ramillien

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The Gulf of Carpentaria in northern Australia has a weather-driven annual periodic amplitude in sea surface height of ~ 0.4 m. Such a signal generates a mass variation that is readily detected by the GRACE mission. We used this naturally occurring phenomenon over a region of ~ 2.6 × 10⁵ km² to evaluate the accuracy of the GRACE estimates of temporal mass variation. Comparison of the Groupe de Recherche de Géodesie Spatiale 10-day GRACE solutions and observations from a nearby tide gauge show a correlation of 0.93, indicating that the GRGS GRACE solutions capture well the regional signal. On the other hand, the MOG2D-G barotropic model accounts for only ~ 50% of the non-gravitational annual signal, suggesting either deficiencies in the model or that some other non-barotropic process is occurring.

Original language	English
Pages (from-to)	241-244
Number of pages	4
Journal	Earth and Planetary Science Letters
Volume	271
Issue number	1-4
DOIs	https://doi.org/10.1016/j.epsl.2008.04.018
Publication status	Published - 15 Jul 2008

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10.1016/j.epsl.2008.04.018

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title = "GRACE estimates of sea surface height anomalies in the Gulf of Carpentaria, Australia",

abstract = "The Gulf of Carpentaria in northern Australia has a weather-driven annual periodic amplitude in sea surface height of ~ 0.4 m. Such a signal generates a mass variation that is readily detected by the GRACE mission. We used this naturally occurring phenomenon over a region of ~ 2.6 × 105 km2 to evaluate the accuracy of the GRACE estimates of temporal mass variation. Comparison of the Groupe de Recherche de G{\'e}odesie Spatiale 10-day GRACE solutions and observations from a nearby tide gauge show a correlation of 0.93, indicating that the GRGS GRACE solutions capture well the regional signal. On the other hand, the MOG2D-G barotropic model accounts for only ~ 50% of the non-gravitational annual signal, suggesting either deficiencies in the model or that some other non-barotropic process is occurring.",

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AU - Tregoning, Paul

AU - Lambeck, Kurt

AU - Ramillien, Guillaume

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N2 - The Gulf of Carpentaria in northern Australia has a weather-driven annual periodic amplitude in sea surface height of ~ 0.4 m. Such a signal generates a mass variation that is readily detected by the GRACE mission. We used this naturally occurring phenomenon over a region of ~ 2.6 × 105 km2 to evaluate the accuracy of the GRACE estimates of temporal mass variation. Comparison of the Groupe de Recherche de Géodesie Spatiale 10-day GRACE solutions and observations from a nearby tide gauge show a correlation of 0.93, indicating that the GRGS GRACE solutions capture well the regional signal. On the other hand, the MOG2D-G barotropic model accounts for only ~ 50% of the non-gravitational annual signal, suggesting either deficiencies in the model or that some other non-barotropic process is occurring.

AB - The Gulf of Carpentaria in northern Australia has a weather-driven annual periodic amplitude in sea surface height of ~ 0.4 m. Such a signal generates a mass variation that is readily detected by the GRACE mission. We used this naturally occurring phenomenon over a region of ~ 2.6 × 105 km2 to evaluate the accuracy of the GRACE estimates of temporal mass variation. Comparison of the Groupe de Recherche de Géodesie Spatiale 10-day GRACE solutions and observations from a nearby tide gauge show a correlation of 0.93, indicating that the GRGS GRACE solutions capture well the regional signal. On the other hand, the MOG2D-G barotropic model accounts for only ~ 50% of the non-gravitational annual signal, suggesting either deficiencies in the model or that some other non-barotropic process is occurring.

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JO - Earth and Planetary Science Letters

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GRACE estimates of sea surface height anomalies in the Gulf of Carpentaria, Australia

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