An externally‐forced decadal rainfall seesaw pattern over the Sahel and southeast Amazon

Hua, Wenjian; Dai, Aiguo; Zhou, Liming; Qin, Minhua; Chen, Haishan

doi:10.1029/2018GL081406

i

An externally‐forced decadal rainfall seesaw pattern over the Sahel and southeast Amazon

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2019
By Hua, Wenjian ; Dai, Aiguo ; Zhou, Liming ; ...

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Journal Title:

Geophysical Research Letter
Personal Author:

Hua, Wenjian ; Dai, Aiguo ; Zhou, Liming ; Qin, Minhua ; Chen, Haishan
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)
Description:

By analyzing observations and model simulations, here we show that there exists a significant anticorrelation on interannual to multidecadal time scales between the Sahel and southeast Amazon rainfall during July-August-September. This rainfall seesaw, which is strongest on decadal to multidecadal scales, is due to an anomalous meridional gradient of sea surface temperatures across the tropical Atlantic that pushes the Intertropical Convergence Zone and its associated rain belt toward the anomalously warm hemisphere.
Keywords:

Anthropogenic And Volcanic Aerosols Atlantic Multidecadal Oscillation External Forcing Internal Climate Variability Rainfall Variability Seesaw Pattern
Source:

Geophysical Research Letters, 46(2)
DOI:

https://doi.org/10.1029/2018GL081406
Document Type:

Journal Article
Funding:

Grant no. NA15OAR4310086
Rights Information:

CC BY-NC-ND
Compliance:

Submitted
Main Document Checksum:

urn:sha256:2c9cf8167c4ce2ecf67ea53e34fd97e9aa2b5a57a4db8906edab492f349b19e6
Download URL:

https://repository.library.noaa.gov/view/noaa/36784/noaa_36784_DS1.pdf
File Type:

[PDF - 1.88 MB ]

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