@article{fdi:010088712, title = {{A} 50-year cycle of sea surface temperature regulates decadal precipitation in the tropical and {S}outh {A}tlantic region}, author = {{G}orenstein, {I}. and {W}ainer, {I}. and {P}ausata, {F}. {S}. {R}. and {P}rado, {L}. {F}. and {K}hodri, {M}yriam and {D}ias, {P}. {L}. {S}.}, editor = {}, language = {{ENG}}, abstract = {{N}ortheast {B}razil and {W}estern {A}frica are two regions geographically separated by the {A}tlantic {O}cean, both home to vulnerable populations living in semi-arid areas. {A}tlantic {O}cean modes of variability and their interactions with the atmosphere are the main drivers of decadal precipitation in these {A}tlantic {O}cean coastal areas. {H}ow these low-frequency modes of variability evolve and interact with each other is key to understanding and predicting decadal precipitation. {H}ere we use the {S}elf-{O}rganizing {M}aps neural network with different variables to unravel causality between the {A}tlantic modes of variability and their interactions with the atmosphere. {O}ur study finds an 82% (p<0.05) anti-correlation between decadal rainfall in {N}ortheast {B}razil and {W}estern {A}frica from 1979 to 2005. {W}e also find three multi-decadal cycles: 1870-1920, 1920-1970, and 1970-2019 (satellite era), pointing to a 50-year periodicity governing the sea surface temperature anomalies of {T}ropical and {S}outh {A}tlantic. {O}ur results demonstrate how {N}ortheast {B}razil and {W}estern {A}frica rainfall anti-correlation was formed in the satellite era and how it might be part of a 50-year cycle from the {T}ropical and {S}outh {A}tlantic decadal variability.}, keywords = {{ATLANTIQUE} ; {AFRIQUE} {DE} {L}'{OUEST} ; {AMERIQUE} {DU} {SUD} ; {BRESIL} ; {ZONE} {TROPICALE}}, booktitle = {}, journal = {{C}ommunications {E}arth and {E}nvironment}, volume = {4}, numero = {1}, pages = {427 [11 ]}, year = {2023}, DOI = {10.1038/s43247-023-01073-0}, URL = {https://www.documentation.ird.fr/hor/fdi:010088712}, }