Indian Ocean Dipole leads to Atlantic Niño

Zhang, Lei; Han, Weiqing

doi:10.1038/s41467-021-26223-w

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Indian Ocean Dipole leads to Atlantic Niño

2021
By Zhang, Lei ; Han, Weiqing
Source: Nature Communications, 12(1)

[PDF-1.65 MB]

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Journal Title:

Nature Communications
Personal Author:

Zhang, Lei ; Han, Weiqing

Zhang, Lei ; Han, Weiqing Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research)
Description:

Atlantic Niño is the Atlantic equivalent of El Niño-Southern Oscillation (ENSO), and it has prominent impacts on regional and global climate. Existing studies suggest that the Atlantic Niño may arise from local atmosphere-ocean interaction and is sometimes triggered by the Atlantic Meridional Mode (AMM), with overall weak ENSO contribution. By analyzing observational datasets and performing numerical model experiments, here we show that the Atlantic Niño can be induced by the Indian Ocean Dipole (IOD). We find that the enhanced rainfall in the western tropical Indian Ocean during positive IOD weakens the easterly trade winds over the tropical Atlantic, causing warm anomalies in the central and eastern equatorial Atlantic basin and therefore triggering the Atlantic Niño. Our finding suggests that the cross-basin impact from the tropical Indian Ocean plays a more important role in affecting interannual climate variability than previously thought.
Keywords:

[+]

General Biochemistry, Genetics And Molecular Biology General Chemistry General Physics And Astronomy Multidisciplinary
Source:

Nature Communications, 12(1)
DOI:

https://doi.org/10.1038/s41467-021-26223-w
ISSN:

2041-1723
Format:

PDF
Publisher:

Springer Science and Business Media LLC
Document Type:

Journal Article
Funding:

Grant no. NA20OAR4310480
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
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Main Document Checksum:

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urn:sha256:c592a115cbff7a6bf5fafa4cd3263d80c3394a7548bcc6a018324829b16905fd
Download URL:

https://staging-noaa.cdc.gov/view/noaa/58588/noaa_58588_DS1.pdf
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Indian Ocean Dipole leads to Atlantic Niño

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