@article{fdi:010060716,
  title = {{A}n analysis of {SST} gradients off the {P}eruvian coast : the impact of going to higher resolution},
  author = {{V}azquez-{C}uervo, {J}. and {D}ewitte, {B}oris and {C}hin, {T}. {M}. and {A}rmstrong, {E}. {M}. and {P}urca, {S}. and {A}lburqueque, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {P}eruvian {C}oastal {U}pwelling {S}ystem ({PCUS}) is one of the most productive fisheries in the world. {U}pwelling events are associated with changes in the magnitude and location of frontal structures. {SST} gradients from four different data sets, {NCDC}, {REMSS}, {OSTIA}, and {MUR} are compared in two test areas off the {PCUS}: {P}aita (5 degrees {S}) and {P}isco (14 degrees {S}). {I}n both areas gradients derived from the {MUR} data set show greater magnitudes, as well as larger seasonal cycles. {O}ff {P}isco, the magnitude of the seasonal cycle of 2.2 degrees {C}/100 km in {MUR} is larger than the one derived from the lower resolution data sets. {A}ll data sets at {P}isco exhibit a seasonal cycle that peaks in late {A}ustral summer and early fall. {H}ovmoller diagrams calculated at 5.5 degrees {S}, 10.5 degrees {S}, and 14.5 degrees {S} show clearly defined offshore maxima in the cross-shore gradients for all the data sets. {U}pwelling scales determined by the distance to the first maxima vary depending on the data set used. {A}t 5.5 degrees {S} upwelling scales vary from 10 km for {MUR} to 50 km for {NCDC} {A}t 14.5 degrees {S} the scales vary from 20 km for {MUR} to 40 km for {OSTIA}. {A}ll four data sets show similar large-scale structures associated with the {P}eruvian upwelling. {H}owever, {MUR} shows finer scale structures that are most likely due to submesoscale to mesoscale eddies. {S}ub-sampled {MUR} 1 km data at the 25 km, 9 km, and 4 km resolutions compare well in magnitude and phase with the lower resolution products. {A}greement in gradient magnitude between the lower resolution data sets and the {MUR} sub-sampled at their respective resolutions implies that the pixel-to-pixel analysis noise in {MUR} is at a similar level as the other data sets.},
  keywords = {{S}ea surface temperatures ; {C}oastal/upwelling studies ; {U}pwelling ; {S}atellite derived ; {O}bjective interpolation ; {PEROU}},
  booktitle = {},
  journal = {{R}emote {S}ensing of {E}nvironment},
  volume = {131},
  numero = {},
  pages = {76--84},
  ISSN = {0034-4257},
  year = {2013},
  DOI = {10.1016/j.rse.2012.12.010},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060716},
}