@article{fdi:010062573,
  title = {{W}hat dynamics drive future wind scenarios for coastal upwelling off {P}eru and {C}hile ?},
  author = {{B}elmadani, {A}. and {E}chevin, {V}incent and {C}odron, {F}. and {T}akahashi, {K}. and {J}unquas, {C}l{\'e}mentine},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he dynamics of the {P}eru-{C}hile upwelling system ({PCUS}) are primarily driven by alongshore wind stress and curl, like in other eastern boundary upwelling systems. {P}revious studies have suggested that upwelling-favorable winds would increase under climate change, due to an enhancement of the thermally-driven cross-shore pressure gradient. {U}sing an atmospheric model on a stretched grid with increased horizontal resolution in the {PCUS}, a dynamical downscaling of climate scenarios from a global coupled general circulation model ({CGCM}) is performed to investigate the processes leading to sea-surface wind changes. {D}ownscaled winds associated with present climate show reasonably good agreement with climatological observations. {D}ownscaled winds under climate change show a strengthening off central {C}hile south of 35{A} degrees {S} (at 30{A} degrees {S}-35{A} degrees {S}) in austral summer (winter) and a weakening elsewhere. {A}n alongshore momentum balance shows that the wind slowdown (strengthening) off {P}eru and northern {C}hile (off central {C}hile) is associated with a decrease (an increase) in the alongshore pressure gradient. {W}hereas the strengthening off {C}hile is likely due to the poleward displacement and intensification of the {S}outh {P}acific {A}nticyclone, the slowdown off {P}eru may be associated with increased precipitation over the tropics and associated convective anomalies, as suggested by a vorticity budget analysis. {O}n the other hand, an increase in the land-sea temperature difference is not found to drive similar changes in the cross-shore pressure gradient. {R}esults from another atmospheric model with distinct {CGCM} forcing and climate scenarios suggest that projected wind changes off {P}eru are sensitive to concurrent changes in sea surface temperature and rainfall.},
  keywords = {{R}egional climate change ; {P}eru-{C}hile upwelling system ; {D}ynamical downscaling ; {U}pwelling-favorable winds ; {C}limate scenarios ; {PEROU} ; {CHILI}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {43},
  numero = {7-8},
  pages = {1893--1914},
  ISSN = {0930-7575},
  year = {2014},
  DOI = {10.1007/s00382-013-2015-2},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062573},
}