Search
Now showing items 1-10 of 15
Mapping the Oceanic Mesoscale Circulation: Validation of Satellite Altimetry Using Surface Drifters
Publisher: American Meteorological Society
Abstract: This study aims to show that Lagrangian surface drifters are a suitable means of validating the mapping of oceanic mesoscale circulation by satellite altimetry. Tests are done using Geosat data to simulate drifter trajectories ...
Effects of Global Mean Atmospheric Pressure Variations on Mean Sea Level Changes from TOPEX/Poseidon
Publisher: American Meteorological Society
Abstract: The authors used meteorological pressure fields from the European Centre for Medium-Range Weather Forecasts to calculate a mean global pressure to serve as a reference for an improved inverse barometer correction of altimeter ...
Analysis of Errors Due to Polynomial Adjustment of Altimeter Profiles
Publisher: American Meteorological Society
Abstract: Among the various sources of error on altimetric sea surface height variability, the orbit error has the largest amplitude. However, since orbit error is mostly at long wavelengths, it can theoretically be distinguished ...
Use of a High-Resolution Model to Analyze the Mapping Capabilities of Multiple-Altimeter Missions
Publisher: American Meteorological Society
Abstract: The contribution of merging multiple-satellite altimeter missions to the mapping of sea level is analyzed from a North Atlantic high-resolution (1/10°) numerical simulation. The model is known to represent the mesoscale ...
An Improved Mapping Method of Multisatellite Altimeter Data
Publisher: American Meteorological Society
Abstract: Objective analysis of altimetric data (sea level anomaly) usually assumes that measurement errors are well represented by a white noise, though there are long-wavelength errors that are correlated over thousands of kilometers ...
Exploring the Benefits of Using CryoSat-2's Cross-Track Interferometry to Improve the Resolution of Multisatellite Mesoscale Fields
Publisher: American Meteorological Society
Abstract: ea surface height (SSH) measurements provided by pulse-limited radar altimeters are one-dimensional profiles along the satellite's nadir track, with no information whatsoever in the cross-track direction. The anisotropy ...
Reducing Cross-Track Geoid Gradient Errors around TOPEX/Poseidon and Jason-1 Nominal Tracks: Application to Calculation of Sea Level Anomalies
Publisher: American Meteorological Society
Abstract: A new technique is developed and tested to correct for cross-track geoid gradients in altimeter data. The proposed method is based on direct estimations of geoid variations around nominal tracks and on knowledge of ocean ...
Empirical Correction of XBT Data
Publisher: American Meteorological Society
Abstract: he authors use a collocation method between XBT and CTD/Ocean Station Data (OSD; including bottle cast and low-resolution CTD) from World Ocean Database 2005 (WOD2005) to statistically correct the XBT fall rate. An analysis ...
Reducing Orbit Error for a Better Estimate of oceanic Variability from Satellite Altimetry
Publisher: American Meteorological Society
Abstract: The variable ocean dynamic topography is generally estimated from the satellite altimeter signal once the orbit error has been removed. To compute the orbit error, the most conventional technique is to fit a polynomial ...