@article{fdi:010060859,
  title = {{U}sing altimetry and seafloor pressure data to estimate vertical deformation offshore : {V}anuatu case study},
  author = {{B}allu, {V}al{\'e}rie and {B}onnefond, {P}. and {C}almant, {S}t{\'e}phane and {B}ouin, {M}. {N}. and {P}elletier, {B}ernard and {L}aurain, {O}. and {C}rawford, {W}. {C}. and {B}aillard, {C}. and de {V}iron, {O}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}easuring ground deformation underwater is essential for understanding {E}arth processes at many scales. {O}ne important example is subduction zones, which can generate devastating earthquakes and tsunamis, and where the most important deformation signal related to plate locking is usually offshore. {W}e present an improved method for making offshore vertical deformation measurements, that involve combining tide gauge and altimetry data. {W}e present data from two offshore sites located on either side of the plate interface at the {N}ew {H}ebrides subduction zone, where the {A}ustralian plate subducts beneath the {N}orth {F}iji basin. {T}hese two sites have been equipped with pressure gauges since 1999, to extend an on-land {GPS} network across the plate interface. {T}he pressure series measured at both sites show that {W}usi {B}ank, located on the over-riding plate, subsides by 11 +/- 4 mm/yr with respect to {S}abine {B}ank, which is located on the down-going plate. {B}y combining water depths derived from the on-bottom pressure data with sea surface heights derived from altimetry data, we determine variations of seafioor heights in a global reference frame. {U}sing altimetry data from {TOPEX}/{P}oseidon, {J}ason-1, {J}ason-2 and {E}nvisat missions, we find that the vertical motion at {S}abine {B}ank is close to zero and that {W}usi {B}ank subsides by at least 3 mm/yr and probably at most 11 mm/yr. {T}his paper represents the first combination of altimetry and pressure data to derive absolute vertical motions offshore. {T}he deformation results are obtained in a global reference frame, allowing them to be integrated with on-land {GNSS} data.},
  keywords = {{P}ressure gauge ; {R}adar altimetry ; {V}ertical deformation ; {V}anuatu ; {VANUATU}},
  booktitle = {},
  journal = {{A}dvances in {S}pace {R}esearch},
  volume = {51},
  numero = {8},
  pages = {1335--1351},
  ISSN = {0273-1177},
  year = {2013},
  DOI = {10.1016/j.asr.2012.06.009},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060859},
}