Sea surface height determination in the Arctic Ocean from ERS altimetry.
J GEOPHYS RES-OCEANS
, Article C07001. 10.1029/2001JC001026.
 Accurate sea surface height measurements have been extracted from ERS altimeter data in sea ice - covered regions for the first time. The data have been used to construct a mean sea surface of the Arctic Ocean between the latitudes of 60 degreesN and 81.5 degreesN based on 4 years of ERS-2 data. An RMS value for the crossover differences of mean sea surface profiles of 4.2 cm was observed in the ice-covered Canada Basin, compared with 3.8 cm in the ice-free Greenland-Iceland-Norwegian Seas. Comparisons are made with an existing global mean sea surface (OSUMSS95), highlighting significant differences between the two surfaces in permanently ice-covered seas. In addition, we present the first altimeter-derived sea surface height variability map of the Arctic Ocean. Comparisons with a high-resolution coupled ocean - sea ice general circulation model reveal a good qualitative agreement in the spatial distribution of variability. Quantitatively, we found that the observed variability was on average a factor of 3 - 4 greater than model predictions.
|Title:||Sea surface height determination in the Arctic Ocean from ERS altimetry|
|Keywords:||Arctic, ocean, satellite, altimetry, ERS, SOUTHERN CANADIAN BASIN, SATELLITE ALTIMETRY, GEOSAT ALTIMETER, RADAR-ALTIMETER, GRAVITY-FIELD, MESOSCALE VARIABILITY, ACCURACY ASSESSMENT, PROCESSING SCHEME, ICE, TOPEX/POSEIDON|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences
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