@article{fdi:010064758,
  title = {{A}eolian particles in marine cores as a tool for quantitative high-resolution reconstruction of upwelling favorable winds along coastal {A}tacama {D}esert, {N}orthern {C}hile},
  author = {{F}lores-{A}queveque, {V}. and {A}lfaro, {S}. and {V}argas, {G}. and {R}utllant, {J}. {A}. and {C}aquineau, {S}andrine},
  editor = {},
  language = {{ENG}},
  abstract = {{U}pwelling areas play a major role in ocean biogeochemical cycles and ultimately in global climate, especially in higly productive regions as the {S}outh {E}astern {P}acific. {T}his work is based on the analysis of the aeolian lithic particles accumulated in laminated sediments off {M}ejillones (23 degrees {S}) in the eastern boundary {H}umboldt {C}urrent {S}ystem. {I}t proposes a high-resolution quantitative reconstruction of the upwelling-favorable southerly wind strength in the past similar to 250 years, comparing its variability with changes in organic carbon export/preserved changes to the sea bottom. {T}he increase of the intensity and variability in fluxes of particles larger than 35 mu m and 100 mu m since the second half of the 19th century and during the 20th century confirms a general strengthening of southerly winds in the region. {S}pectral analysis on the complete time-series of yearly depositional fluxes indicates that sedimentary variability can be explained by a combination of interannual ({ENSO}) to decadal ({PDO}) oscillations similar to the ones yielded by the analysis of the {I}nterdecadal {P}acific {O}scillation index. {H}owever, when applied separately to the lithic fluxes of the first and last centuries of the time-series, the method shows that relative to the one of the interannual mode of variability, the influence of the decadal mode has increased in the recent period. {B}ased on the presence/absence of particles with sizes larger than 35/100 mu m, each year of the time series is classified as a '{L}ow wind' (<6 m/s), '{I}ntermediate wind' (6-8 m/s), or '{S}trong wind' (10 to >12 m/s) year. {F}rom the {AD} 1754-1820 period to the {AD} 1878-1998 one, the proportion of {L}ow and {I}ntermediate wind years decreased from 12% and 74% to 3% and 68%, respectively, whereas the proportion of strong wind years increased from 14% to 29%. {F}or these periods the mean organic carbon also increased 22%, stating the strong relation between export/preservation productivity rate and southerly wind intensity. {I}n the recent period (from {AD} 1950 on) for which the {O}ceanic {N}ino {I}ndex is available, the strong wind years ({AD} 1982, 1983, 1994, and 1997) correspond to large values of this index, suggesting that constructive interferences that result from the interplay between interannual and decadal oscillations modes might explain in part the reinforcement of the winds along the {N}orth {C}hilean coast.},
  keywords = {{CHILI} ; {ATACAMA} ; {PACIFIQUE} ; {MEJILLONES} {BAIE}},
  booktitle = {},
  journal = {{P}rogress in {O}ceanography},
  volume = {134},
  numero = {},
  pages = {244--255},
  ISSN = {0079-6611},
  year = {2015},
  DOI = {10.1016/j.pocean.2015.02.003},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064758},
}