@article{fdi:010070251,
  title = {{C}limate change evidences from the end of the {L}ittle {I}ce {A}ge to the {C}urrent {W}arm {P}eriod registered by {M}elincue {L}ake ({N}orthern {P}ampas, {A}rgentina)},
  author = {{G}uerra, {L}. and {P}iovano, {E}. {L}. and {C}ordoba, {F}. {E}. and {T}achikawa, {K}. and {R}ostek, {F}. and {G}arcia, {M}. and {B}ard, {E}. and {S}ylvestre, {F}lorence},
  editor = {},
  language = {{ENG}},
  abstract = {{G}eochemical, sedimentological, historical and instrumental information from {M}elincue {L}ake (33 degrees 43'{S}/61 degrees 28'{W}) was analyzed in order to reconstruct main hydro-climatic changes along the {P}ampean region, considering the end of the {L}ittle {I}ce {A}ge ({LIA}) and the {C}urrent {W}arm {P}eriod ({CWP}) climatic phases. {E}lemental {X}-ray fluorescence determinations were performed on a dated short core extracted from the deepest part of the lake. {C}hemical ({C}a, {S}r, {A}l, {K}, {S}i, {T}i and {F}e) variation was analyzed along with physical (magnetic susceptibility, dry bulk density and medium particle size) and mineralogical proxies, as well as carbon and nitrogen contents (organic and inorganic carbon and organic nitrogen). {M}ulticomponent statistical analyses allowed the identification of the main environmental processes ruling sedimentation, which included carbonate precipitation, detrital input and primary productivity. {H}omogeneous, carbonate-rich, detrital-rich and organic matter-poor deposits reflect very shallow and ephemeral lake conditions during the last years of the {LIA} period. {V}ery low sedimentation rates and the presence of discontinuities in the sedimentary record pointed to episodes of extensive lake shrinkages and probable lake-floor subaerial exposures. {B}edded and laminated organic-rich muds accumulated in perennial lake conditions after ca. {AD} 1880 reveal an important environmental change concurrent with the onset of the {C}urrent {W}arm {P}eriod. {T}he contrast of sediment composition and lithological characteristics with the instrumental record of the {CWP} allowed us to consider the development of a shallow saline-lake system, enhanced detrital input and carbonate precipitation during dry periods. {I}n turn, higher lake levels, and thus more diluted lake-waters during wetter periods, resulted in enhanced organic lake productivity and lower carbonate precipitation. {T}he comparison of the paleolimnological reconstruction from {M}elincue {L}ake to different hydrological and paleoclimatic records (i.e. limnimetric measurements and ocean temperature changes) suggests that the moisture variation registered between the {LIA} and the {CWP} was consistent with (and likely forced by) large-scale climatic oscillations. {T}he present study provides new evidences to evaluate the climate and environmental changes in central {A}rgentina related to the dynamics of the {S}outh {A}merican {M}onsoon system during the last five centuries.},
  keywords = {{A}rgentinean {P}ampean lakes ; {L}acustrine sediments ; {X}-ray fluorescence ; {S}outh {A}merican {M}onsoon ; {C}urrent {W}arm {P}eriod ; {ARGENTINE}},
  booktitle = {},
  journal = {{Q}uaternary {I}nternational},
  volume = {438},
  numero = {{A}},
  pages = {160--174},
  ISSN = {1040-6182},
  year = {2017},
  DOI = {10.1016/j.quaint.2016.06.033},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070251},
}