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

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

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008e%26psl.271..241t&link_type=abstract

Earth and Planetary Science Letters, Volume 271, Issue 1-4, p. 241-244.

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Scientific paper

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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