Publications des scientifiques de l'IRD

Birol F., Nino Fernando. (2015). Ku- and Ka-band altimeter data in the northwestern mediterranean sea : impact on the observation of the coastal ocean variability. Marine Geodesy, 38 (1), p. 313-327. ISSN 0149-0419.

Titre du document
Ku- and Ka-band altimeter data in the northwestern mediterranean sea : impact on the observation of the coastal ocean variability
Année de publication
2015
Type de document
Article référencé dans le Web of Science WOS:000362123500021
Auteurs
Birol F., Nino Fernando
Source
Marine Geodesy, 2015, 38 (1), p. 313-327 ISSN 0149-0419
The strong increase in altimeter measurement errors near land surfaces is a limiting factor for coastal applications. We analyze the performance of the new Ka-band SARAL/AltiKa (SRL) mission in the northwestern Mediterranean Sea. SRL sea surface height (SSH) measurements are compared with those from the Jason-2 Ku-band satellite mission. The results show a significant increase in both quantity and quality of SSH data available near coastlines when using SRL data. Available edited data are 95.1% of SRL compared with 88.6% for Jason-2. Closer than 10km to the coastline, available SRL data are still about 60% and only about 31% for Jason-2. Comparisons of the altimeter sea level variations are made with available coastal tide gauge data. The differences obtained between altimeter and tide gauge SLA time series are reduced for SRL (3.3cm in average) compared with Jason-2 (4.2cm in average), especially closer than 30km to the land. It results in higher correlations (by 30%) obtained with SRL data. The coastal circulation derived from altimetry using SRL data shows an offshore meandering, which is more stable in time and with larger velocities close to the coast than that derived from Jason-2 observations.
Plan de classement
Limnologie physique / Océanographie physique [032] ; Télédétection [126]
Description Géographique
MEDITERRANEE
Localisation
Fonds IRD [F B010065332]
Identifiant IRD
fdi:010065332
Contact