caa a22 4500 60547334X CHVBK 20210128100342.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s00382-014-2297-z doi (NATIONALLICENCE)springer-10.1007/s00382-014-2297-z Processes driving intraseasonal displacements of the eastern edge of the warm pool: the contribution of westerly wind events [Elektronische Daten] [Kyla Drushka, Hugo Bellenger, Eric Guilyardi, Matthieu Lengaigne, Jérôme Vialard, Gurvan Madec] We investigate the processes responsible for the intraseasonal displacements of the eastern edge of the western Pacific warm pool (WPEE), which appear to play a role in the onset and development of El Niño events. We use 25years of output from an ocean general circulation model experiment that is able to accurately capture the observed displacements of the WPEE, sea level anomalies, and upper ocean zonal currents at intraseasonal time scales in the western and central Pacific Ocean. Our results confirm that WPEE displacements driven by westerly wind events (WWEs) are largely controlled by zonal advection. This paper has also two novel findings: first, the zonal current anomalies responsible for the WPEE advection are driven primarily by local wind stress anomalies and not by intraseasonal wind-forced Kelvin waves as has been shown in most previous studies. Second, we find that intraseasonal WPEE fluctuations that are not related to WWEs are generally caused by intraseasonal variations in net heat flux, in contrast to interannual WPEE displacements that are largely driven by zonal advection. This study hence raises an interesting question: can surface heat flux-induced zonal WPEE motions contribute to El Niño-Southern Oscillation evolution, as WWEs have been shown to be able to do? Springer-Verlag Berlin Heidelberg, 2014 Westerly wind events nationallicence Western Pacific warm pool nationallicence Air-sea interaction nationallicence El Niño nationallicence Intraseasonal variability nationallicence Drushka Kyla Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut Bellenger Hugo Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut Guilyardi Eric Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut Lengaigne Matthieu Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut Vialard Jérôme Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut Madec Gurvan Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut Climate Dynamics Springer Berlin Heidelberg 44/3-4(2015-02-01), 735-755 0930-7575 44:3-4<735 2015 44 382 https://doi.org/10.1007/s00382-014-2297-z 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/s00382-014-2297-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Drushka Kyla Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut NATIONALLICENCE 700 1- Bellenger Hugo Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut NATIONALLICENCE 700 1- Guilyardi Eric Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut NATIONALLICENCE 700 1- Lengaigne Matthieu Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut NATIONALLICENCE 700 1- Vialard Jérôme Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut NATIONALLICENCE 700 1- Madec Gurvan Laboratoire d'Océanographie Expérimentation et Approches Numériques, CNRS, IRD, MNHN, UPMC, Case 100, Place Jussieu, 75252, Paris Cedex 05, France aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/3-4(2015-02-01), 735-755 0930-7575 44:3-4<735 2015 44 382