@article{fdi:010082138,
  title = {{A}ltimetry-based sea level trends along the coasts of {W}estern {A}frica},
  author = {{M}arti, {F}. and {C}azenave, {A}. and {B}irol, {F}. and {P}assaro, {M}. and {L}eger, {F}. and {N}ino, {F}ernando and {A}lmar, {R}afa{\¨e}l and {B}enveniste, {J}. and {L}egeais, {J}. {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e present results of contemporary coastal sea level changes along the coasts of {W}estern {A}frica, obtained from a dedicated reprocessing of satellite altimetry data done in the context of the {ESA} '{C}limate {C}hange {I}nitiative' sea level project. {H}igh sampling rate (20 {H}z) sea level data from the {J}ason-1 and {J}ason-2 missions over a 14-year-long time span ({J}uly 2002 to {J}une 2016) are considered. {T}he data were first retracked using the {ALES} adaptative leading edge subwaveform retracker. {T}he {X}-{TRACK} processing system developed to optimize the completeness and accuracy of the corrected sea level time series in coastal ocean areas was then applied. {F}rom the 14-year long sea level time series finally obtained, we estimate sea level trends along the {J}ason-1 & 2 tracks covering the study region. {W}e analyze regional variations in sea level trends, with a focus on the changes observed between the open ocean to the coastal zone. {C}ompared to the conventional 1 {H}z sea level products dedicated to open ocean applications, the retracked 20 {H}z measurements used in this study allow us to retrieve valid sea level information much closer to the coast (less than 3-4 km to the coast, depending on the satellite track location). {T}he main objective of this study is twofold: (1) provide sea level products in the coastal areas from reprocessed altimetry data and (2) check whether sea level changes at the coast differ from that reported in the open ocean with conventional altimetry products. {I}n the selected region, results show that over the study period, sea level trends observed near the coast of {W}estern {A}frica are significantly different than offshore trends. {I}n order to assess the robustness of the results, detailed analyses are performed at several locations to discriminate between possible drifts in the geophysical corrections and physical processes potentially able to explain the sea level changes observed close to the coast.},
  keywords = {{S}atellite altimetry ; {S}ea level ; {C}oastal zones ; {AFRIQUE} {DE} {L}'{OUEST}},
  booktitle = {25 years of progress in radar altimetry},
  journal = {{A}dvances in {S}pace {R}esearch},
  volume = {68},
  numero = {2 {N}o {S}p{\'e}cial},
  pages = {504--522},
  ISSN = {0273-1177},
  year = {2021},
  DOI = {10.1016/j.asr.2019.05.033},
  URL = {https://www.documentation.ird.fr/hor/fdi:010082138},
}