@article{fdi:010065332, title = {{K}u- and {K}a-band altimeter data in the northwestern mediterranean sea : impact on the observation of the coastal ocean variability}, author = {{B}irol, {F}. and {N}ino, {F}ernando}, editor = {}, language = {{ENG}}, abstract = {{T}he strong increase in altimeter measurement errors near land surfaces is a limiting factor for coastal applications. {W}e analyze the performance of the new {K}a-band {SARAL}/{A}lti{K}a ({SRL}) mission in the northwestern {M}editerranean {S}ea. {SRL} sea surface height ({SSH}) measurements are compared with those from the {J}ason-2 {K}u-band satellite mission. {T}he results show a significant increase in both quantity and quality of {SSH} data available near coastlines when using {SRL} data. {A}vailable edited data are 95.1% of {SRL} compared with 88.6% for {J}ason-2. {C}loser than 10km to the coastline, available {SRL} data are still about 60% and only about 31% for {J}ason-2. {C}omparisons of the altimeter sea level variations are made with available coastal tide gauge data. {T}he differences obtained between altimeter and tide gauge {SLA} time series are reduced for {SRL} (3.3cm in average) compared with {J}ason-2 (4.2cm in average), especially closer than 30km to the land. {I}t results in higher correlations (by 30%) obtained with {SRL} data. {T}he 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 {J}ason-2 observations.}, keywords = {{C}oastal dynamics ; {N}orthern {C}urrent ; northwestern {M}editerranean {S}ea ; satellite altimetry ; sea surface observations ; {MEDITERRANEE}}, booktitle = {}, journal = {{M}arine {G}eodesy}, volume = {38}, numero = {1}, pages = {313--327}, ISSN = {0149-0419}, year = {2015}, DOI = {10.1080/01490419.2015.1034814}, URL = {https://www.documentation.ird.fr/hor/fdi:010065332}, }