@article{fdi:010053728, title = {{C}limate variability and extreme drought in the upper {S}olimoes {R}iver (western {A}mazon {B}asin) : {U}nderstanding the exceptional 2010 drought}, author = {{E}spinoza, {J}. {C}. and {R}onchail, {J}. and {G}uyot, {J}ean-{L}oup and {J}unquas, {C}. and {V}auchel, {P}hilippe and {L}avado, {W}. and {D}rapeau, {G}. and {P}ombosa, {R}.}, editor = {}, language = {{ENG}}, abstract = {{T}his work provides an initial overview of climate features and their related hydrological impacts during the recent extreme droughts (1995, 1998, 2005 and 2010) in the upper {S}olimoes {R}iver (western {A}mazon), using comprehensive in situ discharge and rainfall datasets. {T}he droughts are generally associated with positive {SST} anomalies in the tropical {N}orth {A}tlantic and weak trade winds and water vapor transport toward the upper {S}olimoes, which, in association with increased subsidence over central and southern {A}mazon, explain the lack of rainfall and very low discharge values. {B}ut in 1998, toward the end of the 1997-98 {E}l {N}ino event, the drought is more likely related to an anomalous divergence of water vapor in the western {A}mazon that is characteristic of a warm event in the {P}acific. {D}uring the austral spring and winter of 2010, the most severe drought since the seventies has been registered in the upper {S}olimoes. {I}ts intensity and its length, when compared to the 2005 drought, can be explained by the addition of an {E}l {N}ino in austral summer and a very warm episode in the {A}tlantic in boreal spring and summer. {A}s in 2005, the lack of water in 2010 was more important in the southern tropical tributaries of the upper {S}olimoes than in the northern ones.}, keywords = {{AMAZONIE}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {38}, numero = {}, pages = {{L}13406}, ISSN = {0094-8276}, year = {2011}, DOI = {10.1029/2011gl047862}, URL = {https://www.documentation.ird.fr/hor/fdi:010053728}, }