HR: 1340h
AN: G33B-0045    [Abstracts]
TI: Extracting the low frequency signal from GRACE data
AU: * de Viron, O
EM: deviron@ipgp.jussieu.fr
AF: Institut de Physique du Globe de Paris, 4, Place Jussieu, Case 84, Paris, 75005 France
AU: Diament, M
EM: diament@ipgp.jussieu.fr
AF: Institut de Physique du Globe de Paris, 4, Place Jussieu, Case 84, Paris, 75005 France
AU: Panet, I
EM: panet@ipgp.jussieu.fr
AF: Institut de Physique du Globe de Paris, 4, Place Jussieu, Case 84, Paris, 75005 France
AU: Panet, I
EM: panet@ipgp.jussieu.fr
AF: Laboratoire de Recherche en G‚od‚sie, Institut G‚ographique National, 6/8 avenue Blaise Pascal Cit‚ Descartes, Champs/Marne , Marne La Vall‚e, 77455
AB: At present, 22 gravity fields have been retrieved from the GRACE data. We use a method based on the principal component decomposition and singular spectrum analysis, in order to extract the low frequency part of the signal (period larger than one year) from the data, and we compare the interannual geodetic signal with its likely geophysical causes, obtained from ocean, hydrosphere and atmosphere model. In particular, the relation with the quasi-biennial part of the El-Ni¤o Southern Oscillation (and the associated Southern Oscillation Index (SOI)) will be discussed.
DE: 1217 Time variable gravity (7223, 7230)
DE: 1218 Mass balance (0762, 1223, 1631, 1836, 1843, 3010, 3322, 4532)
SC: Geodesy [G]
MN: Fall Meeting 2005