HR: 0830h
AN: G21C-0279    [PDF]
TI: Analyzing European Inter-Annual Sea Level Variability Using Tide Gauges and Altimetry.
AU: * Kj‘r, N
EM: nik@kms.dk
AF: National Survey and Cadastre (KMS), Rentemestervej 8, Copenhagen NV, 2400 Denmark
AB: Along the European coasts, tide gauges have been used to monitor sea level for decades. For the last decade sea level have also been monitored by the T/P satellite altimeter at high spatial low temporal coverage . A comparative analysis of sea level from tide gauge and Topex/Poseidon (T/P) altimeter is an integral part of the European Sea Level Service - Research Infrastructure (ESEAS-RI) project. The seas around Europe are divided into sub basins, realizing that each basin has different characteristics, with regard to the dominant frequencies of the sea level heights, not least due to the physical configuration where narrow straits separates the basins (i.e. the Mediterranean, Baltic, Black Sea). Our analysis shows good agreement in the frequency response between tide gauges and T/P measurements, especially on timescales of 1-5 years. This holds for both closed basins and the open Northeast Atlantic Ocean. Despite their location on the basin margins, tide gauges capture the inter-annual variability on a wider spatial scale quite well. When analyzing long (50+ yrs) time series from tide gauges, it is evident, that the dominant frequencies within a basin changes over time. However, the frequency change patterns seems to be similar from basin to basin.
UR: http://research.kms.dk/~eseas
DE: 1200 GEODESY AND GRAVITY
DE: 1299 General or miscellaneous
DE: 4200 OCEANOGRAPHY: GENERAL
DE: 4215 Climate and interannual variability (3309)
DE: 4243 Marginal and semienclosed seas
SC: Geodesy [G]
MN: 2003 Fall Meeting