Severe droughts over South America: sea surface temperature impacts in the present...
| Full text | |
| Author(s): |
Carlo Espinoza, Jhan
[1]
;
Marengo, Jose Antonio
[2]
;
Ronchail, Josyane
[3]
;
Molina Carpio, Jorge
[4]
;
Noriega Flores, Luis
[5]
;
Loup Guyot, Jean
[6]
Total Authors: 6
|
| Affiliation: | [1] IGP, Lima - Peru
[2] Inst Nacl Pesquisas Espaciais, Ctr Ciencia Sistema Terr, Sao Paulo - Brazil
[3] UPMC, Univ Paris 04, Univ Paris Diderot, Sorbonne Paris Cite, UMR Locean, CNRS, IRD, MNHN, Paris - France
[4] Univ Mayor San Andres, Inst Hidraul & Hidrol, La Paz - Bolivia
[5] Serv Nacl Meteorol & Hidrol, La Paz - Bolivia
[6] IRD, Lima - Peru
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | ENVIRONMENTAL RESEARCH LETTERS; v. 9, n. 12 DEC 2014. |
| Web of Science Citations: | 59 |
| Abstract | |
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. (AU) | |
| FAPESP's process: | 13/50538-7 - Understanding the causes of the biases that determine the onset of the rainy season in Amazonia in climate models using GoAmazon-CHUVA measurements |
| Grantee: | Jose Antonio Marengo Orsini |
| Support type: | Regular Research Grants |