Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Precipitation over northern South America and the far‐eastern Pacific duringENSO: Phase synchronization at inter‐annual time scales


Salas,  Hernán D.
External Organizations;

Builes‐Jaramillo,  Alejandro
External Organizations;


Boers,  Niklas
Potsdam Institute for Climate Impact Research;

Poveda,  Germán
External Organizations;

Mesa,  Óscar J.
External Organizations;


Kurths,  Jürgen
Potsdam Institute for Climate Impact Research;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PIKpublic
Supplementary Material (public)
There is no public supplementary material available

Salas, H. D., Builes‐Jaramillo, A., Boers, N., Poveda, G., Mesa, Ó. J., Kurths, J. (2024): Precipitation over northern South America and the far‐eastern Pacific duringENSO: Phase synchronization at inter‐annual time scales. - International Journal of Climatology, 44, 6, 2106-2123.

Cite as: https://publications.pik-potsdam.de/pubman/item/item_29769
We investigated the influence of the El Niño-Southern Oscillation (ENSO) on inter-annual precipitation variability in the far-eastern Pacific (FEP) and northern South America (NSA) using an approach based on phase synchronization (PS). First, we carried out a detailed analysis of observational data to define the inter-annual variability, eliminate the seasonal residual frequencies in hydro-climatic anomalies, and assess the statistical significance of PS. Additionally, we characterized the seasonality of regional patterns of sea surface temperature, surface pressure levels, low-level winds and precipitation anomalies associated with the ENSO states. We found that the positive (negative) precipitation anomalies experienced in the FEP and NSA differ from those previously reported in the literature. In particular, the Guianas (northeastern Amazon) and the Caribbean constitute two regions with negative (positive) rainfall anomalies during El Niño (La Niña), separated by a zone of non-significant anomalies along the Orinoco Low-level Jet corridor. Moreover, we showed that the ENSO signal is phase-locked with inter-annual rainfall and low-level wind variability in most of the study regions. Furthermore, we found consistency in the PS between the Central and Eastern Pacific El Niño indices and hydroclimatic anomalies over the Pacific. However, some areas exhibited PS, although they did not show significant precipitation anomalies, suggesting that the influence of ENSO on tropical climatology manifests not only in terms of the magnitude of anomalies but also in terms of the phases only. Our approach advances the understanding of climatic anomalies in tropical regions and provides new insights into the non-linear interactions between ENSO and hydroclimatic processes in tropical Americas.