Using a 25-y time series of precision satellite altimeter data from TOPEX/Poseidon, Jason-1, Jason-2, and Jason-3, we estimate the climate-change-driven acceleration of global mean sea level over the last 25 y to be 0.084 ± 0.025 mm/y2 Coupled with the average climate-change-driven rate of sea level rise over these same 25 y of 2.9 mm/y, simple extrapolation of the quadratic implies global mean...

The 3.2 +/- 0.2 millimeter per year global mean sea level rise observed by the Topex/Poseidon satellite over 1993-98 is fully explained by thermal expansion of the oceans. For the period 1955-96, sea level rise derived from tide gauge data agrees well with thermal expansion computed at the same locations. However, we find that subsampling the thermosteric sea level at usual tide gauge positions...

The ocean circulation and its fluctuations are known to have important consequences for climate variations. It is believed that the datively rapid swings of global temperatures (over 10 degree change in less than 30-50 years) in the past interglacial period is primarily associated with changes in the global ocean circulation which regulates the transport of water, heat, and carbon dioxide in th...

The presence of rain in the sub-satellite track can significantly degrade altimeter measurements by causing an attenuation of the backscattered signal, a change in its path length through the atmosphere and a change in the mean square slope of the sea surface. This can cause errors, not only in the measurement of the satellite altitude, but also in the determination of wind speed and wave heigh...

The radar altimeters flown on Geos-3 (1975), Seasat-l (1978), and Geosat-l (1985) have amply demonstrated the benefits of high-precision measurements of ocean-surface topography, both to geodesy and to oceanography. Two new altimetry missions are planned: the joint NASA/Centre National d'Etudes Spatiales TOPEx/Poseidon mission, to be launched in 1992, and the Navy's Special Purpose Inexpensive ...

This paper presents the foundations of a decision support system for the localisation of fisheries based on AI techniques. The purpose of such a system is to reduce the costs of fishing fleets without endangering the sustainable development of the natural resources. Our data sources are satellite images (OrbView-2, Series NOAA, Topex/Poseidon), as well as real catch data obtained from the fishi...

The oceanic tidal angular momentum (OTAM) has been demonstrated to be the primary cause for the diurnal and semidiurnal variations in the Earth's rotational rate, or AUT1. Three ocean tide models derived from the Topex/Poseidon altimetry mission are employed to yield predictions of AUT1 for eight major diurnal/semidiurnal fides. The predictions are compared with geodetic determinations ofAUT1 f...

In spectra computed from bottom pressure records, 18% to 63% of non-tidal energy is associated with frequencies greater than 1 cycle per 20 days, the approximate Nyquist frequency for the TOPEX/Poseidon (T/P) satellite. Since bottom pressure measurements are correlated with coincident sea surface height measurements from the T/P satellite, hourly bottom pressure data are used here to characteri...