Asymmetric impact of Atlantic Multidecadal Oscillation on El Nino and La Nina characteristics
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- Asymmetric impact of Atlantic Multidecadal Oscillation on El Nino and La Nina characteristics
- Sung, Mi-Kyung
- Atlantic Multidecadal Oscillation; ENSO
- Issue Date
- Sung, M.-K., et al. 2015. Asymmetric impact of Atlantic Multidecadal Oscillation on El Ni？o and La Ni？a characteristics, Geophys. Res. Lett., 42: 4998？5004.
- The long-lasting cold surface conditions of North Atlantic, i.e., the negative phase of Atlantic
Multidecadal Oscillation (AMO), can intensify the El Nino？Southern Oscillation through the enhanced air-sea
coupling under the increased central-to-eastern tropical Pacific mean sea surface temperature. However, the
impact of warmermean sea surface temperature (SST) is more efficient in the intensifying El Nino than La Nina,
because of the nature of the exponential growth of atmospheric convection to SST change. Moreover, the
farther eastward shift of the atmospheric convection during the negative AMO leads to the stronger El Nino due
to the longer delayed negative feedback by oceanic waves. Therefore, the AMO mainly influences the El Nino
intensity rather than La Nina intensity.
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