@article{fdi:010069439,
  title = {{S}urface winds off {P}eru-{C}hile : observing closer to the coast from radar altimetry},
  author = {{A}studillo, {O}. and {D}ewitte, {B}oris and {M}allet, {M}. and {F}rappart, {F}. and {R}utllant, {J}. {A}. and {R}amos, {M}. and {B}ravo, {L}. and {G}oubanova, {K}. and {I}llig, {S}erena},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he near-shore surface mesoscale atmospheric circulation in the upwelling systems off {P}eru and {C}hile is influential on the {S}ea {S}urface {T}emperature through {E}kman transport and pumping. {T}here has been a debate whether or not the so-called "wind drop-off", that is a shoreward decrease of the surface wind speed near the coast, can act as an effective forcing of upwelling through {E}kman pumping. {A}lthough the wind drop-off has been simulated by high-resolution atmospheric models, it has not been well documented due to uncertainties in the scatterometry-derived wind estimates associated with land contamination. {H}ere we use the along-track altimetry-derived surface wind speed data from {ENVISAT}, {J}ason-1, {J}ason-2, and {SARAL} satellites, to document the spatial variability of the mean wind drop-off near the coast as estimated from the inversion of the radar backscattering coefficient. {T}he data are first calibrated so as to fit with the scatterometer observations of previous and current satellite missions ({Q}uik{SCAT}, {ASCAT}). {T}he calibrated data are then analyzed near the coast and a wind drop-off scale is estimated. {T}he results indicate that the wind drop-off takes place all along the coast, though with a significant alongshore variability in its magnitude. {D}ifferences between products are shown to be related both to the differences in repeat cycle between the different altimetry missions and to the peculiarities of the coastline shape at the coastal latitudes of the incident tracks. {T}he relative contribution of {E}kman pumping and {E}kman transport to the total transport is also estimated indicating a comparable contribution off {C}hile while transport associated to {E}kman pumping is on average-1.4 larger than {E}kman transport off {P}eru. {D}espite the aliasing effect associated with the weak repetitivity of the satellite orbit and the high frequency variability of the winds in this region, the analysis suggests that the seasonal cycle of the surface winds near the coast could be resolved at least off {P}eru.},
  keywords = {{S}atellite altimetry ; {P}eru-{C}hile upwelling system ; {C}oastal surface winds ; {W}ind drop-off ; {PEROU} ; {CHILI} ; {PACIFIQUE}},
  booktitle = {},
  journal = {{R}emote {S}ensing of {E}nvironment},
  volume = {191},
  numero = {},
  pages = {179--196},
  ISSN = {0034-4257},
  year = {2017},
  DOI = {10.1016/j.rse.2017.01.010},
  URL = {https://www.documentation.ird.fr/hor/fdi:010069439},
}