Time-variable gravity from GRACE: First results

John Wahr; Sean Swenson; Victor Zlotnicki; Isabella Velicogna

doi:10.1029/2004GL019779

Time-variable gravity from GRACE: First results

John Wahr
, Sean Swenson
, Victor Zlotnicki
, Isabella Velicogna

Terrestrial Sciences

University of Colorado Boulder
Jet Propulsion Laboratory, California Institute of Technology

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

736 Scopus citations

Abstract

Eleven monthly GRACE gravity field solutions are now available for analyses. We show those fields can be used to recover monthly changes in water storage, both on land and in the ocean, to accuracies of 1.5 cm of water thickness when smoothed over 1000 km. The amplitude of the annually varying signal can be determined to 1.0 cm. Results are 30% better for a 1500 km smoothing radius, and 40% worse for a 750 km radius. We estimate the annually varying component of water storage for three large drainage basins (the Mississippi, the Amazon, and a region draining into the Bay of Bengal), to accuracies of 1.0-1.5 cm.

Original language	English
Pages (from-to)	L11501 1-4
Journal	Geophysical Research Letters
Volume	31
Issue number	11
DOIs	https://doi.org/10.1029/2004GL019779
State	Published - Jun 16 2004

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10.1029/2004GL019779

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abstract = "Eleven monthly GRACE gravity field solutions are now available for analyses. We show those fields can be used to recover monthly changes in water storage, both on land and in the ocean, to accuracies of 1.5 cm of water thickness when smoothed over 1000 km. The amplitude of the annually varying signal can be determined to 1.0 cm. Results are 30\% better for a 1500 km smoothing radius, and 40\% worse for a 750 km radius. We estimate the annually varying component of water storage for three large drainage basins (the Mississippi, the Amazon, and a region draining into the Bay of Bengal), to accuracies of 1.0-1.5 cm.",

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T2 - First results

AU - Wahr, John

AU - Swenson, Sean

AU - Zlotnicki, Victor

AU - Velicogna, Isabella

PY - 2004/6/16

Y1 - 2004/6/16

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AB - Eleven monthly GRACE gravity field solutions are now available for analyses. We show those fields can be used to recover monthly changes in water storage, both on land and in the ocean, to accuracies of 1.5 cm of water thickness when smoothed over 1000 km. The amplitude of the annually varying signal can be determined to 1.0 cm. Results are 30% better for a 1500 km smoothing radius, and 40% worse for a 750 km radius. We estimate the annually varying component of water storage for three large drainage basins (the Mississippi, the Amazon, and a region draining into the Bay of Bengal), to accuracies of 1.0-1.5 cm.

UR - https://www.scopus.com/pages/publications/4143071515

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DO - 10.1029/2004GL019779

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VL - 31

SP - L11501 1-4

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 11

ER -

Time-variable gravity from GRACE: First results

Abstract

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