Publications des scientifiques de l'IRD

Espinoza J. C., Marengo J. A., Ronchail J., Carpio J. M., Flores L. N., Guyot Jean-Loup. (2014). The extreme 2014 flood in south-western Amazon basin : the role of tropical-subtropical South Atlantic SST gradient. Environmental Research Letters, 9 (12), art. 124007 [9 p.]. ISSN 1748-9326.

Titre du document
The extreme 2014 flood in south-western Amazon basin : the role of tropical-subtropical South Atlantic SST gradient
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000347454800008
Auteurs
Espinoza J. C., Marengo J. A., Ronchail J., Carpio J. M., Flores L. N., Guyot Jean-Loup
Source
Environmental Research Letters, 2014, 9 (12), art. 124007 [9 p.] ISSN 1748-9326
Unprecedented wet conditions are reported in the 2014 summer (December-March) in Southwestern Amazon, with rainfall about 100% above normal. Discharge in the Madeira River (the main southern Amazon tributary) has been 74% higher than normal (58 000 m(3) s(-1)) at Porto Velho and 380% (25 000 m(3) s(-1)) at Rurrenabaque, at the exit of the Andes in summer, while levels of the Rio Negro at Manaus were 29.47 m in June 2014, corresponding to the fifth highest record during the 113 years record of the Rio Negro. While previous floods in Amazonia have been related to La Nina and/or warmer than normal tropical South Atlantic, the 2014 rainfall and flood anomalies are associated with warm condition in the western Pacific-Indian Ocean and with an exceptionally warm Subtropical South Atlantic. Our results suggest that the tropical and subtropical South Atlantic SST gradient is a main driver for moisture transport from the Atlantic toward south-western Amazon, and this became exceptionally intense during summer of 2014.
Plan de classement
Limnologie physique / Océanographie physique [032] ; Hydrologie [062]
Description Géographique
AMAZONE BASSIN ; BOLIVIE ; BRESIL ; ATLANTIQUE ; ZONE TROPICALE
Localisation
Fonds IRD [F B010063643]
Identifiant IRD
fdi:010063643
Contact