caa a22 4500 605471223 CHVBK 20210128100332.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00382-014-2338-7 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2338-7 The ocean-atmosphere response to wind-induced thermocline changes in the tropical South Western Indian Ocean [Elektronische Daten] [Iris Manola, F. Selten, W. de Ruijter, W. Hazeleger] In the Indian Ocean basin the sea surface temperatures (SSTs) are most sensitive to changes in the oceanic depth of the thermocline in the region of the Seychelles Dome. Observational studies have suggested that the strong SST variations in this region influence the atmospheric evolution around the basin, while its impact could extend far into the Pacific and the extra-tropics. Here we study the adjustments of the coupled atmosphere-ocean system to a winter shallow doming event using dedicated ensemble simulations with the state-of-the-art EC-Earth climate model. The doming creates an equatorial Kelvin wave and a pair of westward moving Rossby waves, leading to higher SST 1-2months later in the Western equatorial Indian Ocean. Atmospheric convection is strengthened and the Walker circulation responds with reduced convection over Indonesia and cooling of the SST in that region. The Pacific warm pool convection shifts eastward and an oceanic Kelvin wave is triggered at thermocline depth. The wave leads to an SST warming in the East Equatorial Pacific 5-6months after the initiation of the Seychelles Dome event. The atmosphere responds to this warming with weak anomalous atmospheric convection. The changes in the upper tropospheric divergence in this sequence of events create large-scale Rossby waves that propagate away from the tropics along the atmospheric waveguides. We suggest to repeat these types of experiments with other models to test the robustness of the results. We also suggest to create the doming event in June so that the East-Pacific warming occurs in November when the atmosphere is most sensitive to SST anomalies and El Niño could possibly be triggered by the doming event under suitable conditions. The Author(s), 2014 Seychelles Dome nationallicence Thermocline changes nationallicence Air-sea interactions nationallicence Manola Iris Global Climate Department, Royal Netherlands Meteorological Institute, POBox 201, 3730 AE, De Bilt, The Netherlands aut Selten F. Global Climate Department, Royal Netherlands Meteorological Institute, POBox 201, 3730 AE, De Bilt, The Netherlands aut de Ruijter W. Global Climate Department, Royal Netherlands Meteorological Institute, POBox 201, 3730 AE, De Bilt, The Netherlands aut Hazeleger W. Global Climate Department, Royal Netherlands Meteorological Institute, POBox 201, 3730 AE, De Bilt, The Netherlands aut Climate Dynamics Springer Berlin Heidelberg 45/3-4(2015-08-01), 989-1007 0930-7575 45:3-4<989 2015 45 382 https://doi.org/10.1007/s00382-014-2338-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2338-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Manola Iris Global Climate Department, Royal Netherlands Meteorological Institute, POBox 201, 3730 AE, De Bilt, The Netherlands aut NATIONALLICENCE 700 1- Selten F. Global Climate Department, Royal Netherlands Meteorological Institute, POBox 201, 3730 AE, De Bilt, The Netherlands aut NATIONALLICENCE 700 1- de Ruijter W. Global Climate Department, Royal Netherlands Meteorological Institute, POBox 201, 3730 AE, De Bilt, The Netherlands aut NATIONALLICENCE 700 1- Hazeleger W. Global Climate Department, Royal Netherlands Meteorological Institute, POBox 201, 3730 AE, De Bilt, The Netherlands aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 45/3-4(2015-08-01), 989-1007 0930-7575 45:3-4<989 2015 45 382