@article{fdi:010060261,
  title = {{F}rom drought to flooding : understanding the abrupt 2010-11 hydrological annual cycle in the {A}mazonas {R}iver and tributaries},
  author = {{E}spinoza, {J}.{C}. and {R}onchail, {J}. and {G}uyot, {J}ean-{L}oup and {J}unquas, {C}. and {D}rapeau, {G}. and {M}artinez, {J}ean-{M}ichel and {S}antini, {W}. and {V}auchel, {P}hilippe and {L}avado, {W}. and {O}rdonez, {J}. and {E}spinoza, {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n this work we document and analyze the hydrological annual cycles characterized by a rapid transition between low and high flows in the {A}mazonas {R}iver ({P}eruvian {A}mazon) and we show how these events, which may impact vulnerable riverside residents, are related to regional climate variability. {O}ur analysis is based on comprehensive discharge, rainfall and average suspended sediment data sets. {P}articular attention is paid to the 2010-11 hydrological year, when an unprecedented abrupt transition from the extreme {S}eptember 2010 drought (8300 m(3) s(-1)) to one of the four highest discharges in {A}pril 2011 (49 500 m(3) s(-1)) was recorded at {T}amshiyacu ({A}mazonas {R}iver). {T}his unusual transition is also observed in average suspended sediments. {Y}ears with a rapid increase in discharge are characterized by negative sea surface temperature anomalies in the central equatorial {P}acific during austral summer, corresponding to a {L}a {N}ina-like mode. {I}t originates a geopotential height wave train over the subtropical {S}outh {P}acific and southeastern {S}outh {A}merica, with a negative anomaly along the southern {A}mazon and the southeastern {S}outh {A}tlantic convergence zone region. {A}s a consequence, the monsoon flux is retained over the {A}mazon and a strong convergence of humidity occurs in the {P}eruvian {A}mazon basin, favoring high rainfall and discharge. {T}hese features are also reported during the 2010-11 austral summer, when an intense {L}a {N}ina event characterized the equatorial {P}acific.},
  keywords = {{CYCLE} {HYDROLOGIQUE} ; {VARIATION} {ANNUELLE} ; {SECHERESSE} ; {INONDATION} ; {FACTEUR} {CLIMATIQUE} ; {VARIABILITE} ; {DEBIT} ; {PRECIPITATION} ; {TRANSPORT} {SOLIDE} ; {MATIERE} {EN} {SUSPENSION} ; {SEDIMENTATION} {FLUVIATILE} ; {INTERACTION} {OCEAN} {ATMOSPHERE} ; {TEMPERATURE} {DE} {SURFACE} ; {HUMIDITE} {DE} {L}'{AIR} ; {COURS} {D}'{EAU} ; {MOUSSON} ; {LA} {NINA} ; {PEROU} ; {AMAZONIE} ; {AMAZONE} {COURS} {D}'{EAU} ; {TAMSHIYACU}},
  booktitle = {},
  journal = {{E}nvironmental {R}esearch {L}etters},
  volume = {7},
  numero = {2},
  pages = {art. no 024008 [7 ]},
  ISSN = {1748-9326},
  year = {2012},
  DOI = {10.1088/1748-9326/7/2/024008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060261},
}