@article{fdi:010090338,
  title = {{N}ew insights into multiyear {L}a {N}ina dynamics from the perspective of a near-annual ocean process},
  author = {{L}iu, {F}. {Y}. and {Z}hang, {W}. {J}. and {J}in, {F}. {F}. and {J}iang, {F}. and {B}oucharel, {J}ulien and {H}ua, {S}. {Q}.},
  editor = {},
  language = {{ENG}},
  abstract = {{E}l {N}ino-{S}outhern {O}scillation ({ENSO}) exhibits highly asymmetric temporal evolutions between its warm and cold phases. {W}hile {E}l {N}ino events usually terminate rapidly after their mature phase and show an already established transition into the cold phase by the following summer, many {L}a {N}ina events tend to persist throughout the second year and even reintensify in the ensuing winter. {W}hile many mechanisms were proposed, no consensus has been reached yet and the essential physical processes responsible for the multiyear behavior of {L}a {N}ina remain to be illustrated. {H}ere, we show that a unique ocean physical process operates during multiyear {L}a {N}ina events. {I}t is characterized by rapid double re-versals of zonal ocean current anomalies in the equatorial {P}acific and exhibits a fairly regular near-annual periodicity. {M}ixed-layer heat budget analyses reveal comparable contributions of the thermocline and zonal advective feedbacks to the {SST} anomaly growth in the first year of multiyear {L}a {N}ina events; however, the zonal advective feedback plays a dominant role in the reintensification of {L}a {N}ina events. {F}urthermore, the unique ocean process is identified to be closely associated with the preconditioning heat content state in the central to eastern equatorial {P}acific before the first year of {L}a {N}ina, which has been shown in previous studies to play an active role in setting the stage for the future reintensification of {L}a {N}ina. {D}espite systematic underestimation, the above oceanic process can be broadly reproduced by state-of-the-art cli-mate models, providing a potential additional source of predictability for the multiyear {L}a {N}ina events.},
  keywords = {{A}symmetry ; {ENSO} ; {O}cean dynamics ; {T}ropical variability ; {PACIFIQUE}},
  booktitle = {},
  journal = {{J}ournal of {C}limate},
  volume = {36},
  numero = {21},
  pages = {7435--7450},
  ISSN = {0894-8755},
  year = {2023},
  DOI = {10.1175/jcli-d-22-0505.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090338},
}