HR: 0800h
AN: NG11A-0169    [Abstracts]
TI: Detecting abrupt changes in tide-gauge records
AU: * Becker, M
EM: mbecker@univ-lr.fr
AF: Centre Littoral de Geophysique, Universite de La Rochelle Pole Science, La Rochelle, 17042, France
AU: Karpytchev, M
EM: mkarpytc@univ-lr.fr
AF: Centre Littoral de Geophysique, Universite de La Rochelle Pole Science, La Rochelle, 17042, France
AU: Davy, M
EM: manuel.davy@ec-lille.fr
AF: Laboratoire d'Automatique Genie Informatique et Signal, Cite Scientifique, Villeneuve d'Ascq, 59650,
AU: Doekes, K
EM: koos.doekes@rws.nl
AF: Rijkswaterstaat, RIKZ/ZDI, P.O.Box 20907, EX The Hague, 2500, Netherlands
AB: The tide gauge records contain a whole spectrum of different signatures, from the tidal sea level variations to vertical land motion provoked by global eustatic changes over periods of centuries. The spatial scales and the physical nature of these processes are also extremely variable : they range from local effects (e.g. groundwater pumping or seismic activity close to tide gauges) to global-scale land motion induced by the deglaciation. We develop a systematic statistical approach for detecting the abrupt changes in sea level records taking into account their complicated covariance structure. Examples of abrupt changes detection in several tidal records are presented. Their impact on estimation of the long term sea level rise is discussed.
DE: 3270 Time series analysis (1872, 4277, 4475)
DE: 4277 Time series experiments (1872, 3270, 4475)
DE: 4430 Complex systems
DE: 4468 Probability distributions, heavy and fat-tailed (3265)
DE: 4556 Sea level: variations and mean (1222, 1225, 1641)
SC: Nonlinear Geophysics [NG]
MN: 2007 Fall Meeting