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Mohino Harris, Elsa and Losada Doval, Teresa (2015) Impacts of the Atlantic Equatorial Mode in a warmer climate. Climate dynamics, 45 (7). pp. 2255-2271. ISSN 0930-7575
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Official URL: http://dx.doi.org/10.1007/s00382-015-2471-y
Abstract
The main source of sea surface temperature (SST) variability in the Tropical Atlantic at interannual time scales is the Equatorial Mode or Atlantic El Niño. It has been shown to affect the adjacent continents and also remote regions, leading to a weakened Indian Monsoon and promoting La Niña-type anomalies over the Pacific. However, its effects in a warmer climate are unknown. This work analyses the impact of the Equatorial Mode at the end of the twenty first century by means of sensitivity experiments with an atmosphere general circulation model. The prescribed boundary conditions for the future climate are based on the outputs from models participating in the coupled model intercomparison project-phase V. Our results suggest that even if the characteristics of the Equatorial Mode at the end of the twenty first century remained equal to those of the twentieth century, there will be an eastward shift of the main rainfall positive anomalies in the Tropical Atlantic and a weakening of the negative rainfall anomalies over the Asian monsoon due to the change in climatological SSTs. We also show that extratropical surface temperature anomalies over land related to the mode will change in regions like Southwestern Europe, East Australia, Asia or North America due to the eastward shift of the sea level pressure systems and related surface winds.
Item Type: | Article |
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Additional Information: | © The Author(s) 2015. |
Uncontrolled Keywords: | Rossby-wave propagation; Sea-surface temperature; Steady linear-response; West-african monsoon; Tropical atlantic; El-nino; Interannual variability; Deep convection; Pacific; Ocean |
Subjects: | Sciences > Physics > Geophysics Sciences > Physics > Meteorology |
ID Code: | 34944 |
Deposited On: | 11 Jan 2016 13:55 |
Last Modified: | 18 Jan 2016 12:57 |
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