@article{fdi:010087670,
  title = {{P}acific decadal oscillation influences tropical oxygen minimum zone extent and obscures anthropogenic changes},
  author = {{P}oupon, {M}. {A}. and {R}esplandy, {L}. and {L}evy, {M}arina and {B}opp, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{O}bservations suggest that the tropical {P}acific {O}cean has lost oxygen since the 1960s leading to the expansion of its oxygen minimum zone ({OMZ}). {A}ttribution to anthropogenic forcing is, however, difficult because of limited data availability and the large natural variability introduced by the {P}acific {D}ecadal {O}scillation ({PDO}). {H}ere, we evaluate the {PDO} influence on oxygen dynamics and {OMZ} extent using observations and hindcast simulations from two global ocean circulation models ({NEMO}-{PISCES}, {MOM}6-{COBALT}). {I}n both models, the tropical {P}acific oxygen content decreases by about 30 {T}mol.decade(-1) and the {OMZ} volume expands by 1.3 x 10(5) km(3).decade(-1) during {PDO} positive phases, while variations of similar magnitude but opposite sign are simulated during negative phases. {C}hanges in equatorial advective oxygen supply, partially offset by biological demand, control the oxygen response to {PDO}. {O}bservations which cover 39% of the tropical {P}acific volume only partially capture spatio-temporal variability, hindering the separation of anthropogenic trend from natural variations.},
  keywords = {oxygen ; {P}acific decadal oscillation ; tropical {P}acific ; oxygen minimum zone ; {PACIFIQUE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{G}eophysical {R}esearch {L}etters},
  volume = {50},
  numero = {7},
  pages = {e2022{GL}102123 [10 p.]},
  ISSN = {0094-8276},
  year = {2023},
  DOI = {10.1029/2022gl102123},
  URL = {https://www.documentation.ird.fr/hor/fdi:010087670},
}