@article{fdi:010063601,
  title = {{A} 2700 cal yr {BP} extreme flood event revealed by sediment accumulation in {A}mazon floodplains},
  author = {{M}oreira {T}urcq, {P}atricia and {T}urcq, {B}runo and {M}oreira, {L}. {S}. and {A}morim, {M}. and {C}ordeiro, {R}. {C}. and {G}uyot, {J}ean-{L}oup},
  editor = {},
  language = {{ENG}},
  abstract = {{C}limatic conditions are one of the most important factors affecting hydrological processes in fluvial systems. {H}igher discharges are responsible for higher erosion, greater transport, and also higher deposition. {C}onsequently, sediment accumulation in {A}mazonia floodplain river-connected lakes can be directly related to hydrological patterns of the {A}mazon {R}iver mainstream. {I}n this context, we analyzed five sediment cores taken in two floodplain systems situated in the lower {A}mazon {R}iver, to investigate sediment accumulation patterns during the {H}olocene. {O}ur records show abrupt fluctuations in sedimentation rates in lakes that can reach more than 2 cm/yr during some periods. {W}e find that in all cores, sediment stratigraphy is characterized by packages of sediments of uniform age, which are typically 10-80 cm thick and present a variegated color. {T}he {C}-14 age of the upper package is about 2700 cal yr {BP}. {D}uring this abrupt event, sediment accumulation rates in floodplain lakes can be at least 200 times higher than those of "normal" periods. {T}his sedimentation event is interpreted as being the consequence of one or several successive extreme floods. {T}he 2700 cal yr {BP} event has been also observed in other sites in {S}outh {A}merica and other regions in the world, although different impacts can be observed in each system. {T}his event probably corresponds to a conjunction of favorable conditions for extreme {A}mazon discharge associated with the {M}iddle to {L}ate {H}olocene increase of austral summer insolation and shifts of the {I}ntertropical {C}onvergence {Z}one ({ITCZ}) from northern to southern positions. {I}n this context, a marked negative peak in solar irradiance at 2700 cal yrs {BP} seems to have provoked cooling on the continents and a southward shift of the {ITCZ} associated with a probable reduction in the {A}tlantic {M}eridian {O}verturning {C}irculation.},
  keywords = {{P}aleohydrology ; {A}brupt event ; {C}limate extreme ; 2700 {B}efore present ; {F}loodplain sedimentation ; {A}mazon basin ; {AMAZONE} {BASSIN} ; {BRESIL} ; {PEROU}},
  booktitle = {},
  journal = {{P}alaeogeography {P}alaeoclimatology {P}alaeoecology},
  volume = {415},
  numero = {{SI}},
  pages = {175--182},
  ISSN = {0031-0182},
  year = {2014},
  DOI = {10.1016/j.palaeo.2014.07.037},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063601},
}