@article{fdi:010089469,
  title = {{C}hanges of bottom water oxygenation during the last half millennium in the {G}ulf of {T}ehuantepec ({E}astern {T}ropical {N}orth {P}acific) : {A} multiproxy approach},
  author = {{A}lmaraz-{R}uiz, {L}. and {M}achain-{C}astillo, {M}. and {S}ifeddine, {A}bdelfettah and {R}uiz-{F}ernández, {A}. and {S}anchez-{C}abeza, {J}. {A}. and {R}odríguez-{R}amírez, {A}. and {M}endez-{M}illan, {M}ercedes and {C}aquineau, {S}andrine},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {G}ulf of {T}ehuantepec ({G}o{T}), in the {E}astern {T}ropical {N}orth {P}acific {O}cean, is home to one of the largest and more intense {O}xygen {M}inimum {Z}ones ({OMZ}). {T}o identify the {OMZ} variability during the last five hundred years in the {G}o{T}, we analyzed the temporal variations of benthic foraminiferal ({BF}) assemblages, enrichment of redox-sensitive elements ({M}o, {V}, {C}d, {U}, and {R}e) and delta 15{N}sed , on a laminated sediment core. {D}uring the {L}ittle {I}ce {A}ge ({LIA};-1500 to-1860 {CE}), the {BF} assemblages showed high dominance, and the most abundant {BF} species in the sediments were {E}pistominella sandiegoensis , {T}akayanagia delicata , and {B}uliminella tenuata. {T}his assemblage can withstand the lowest dissolved oxygen conditions, indicating an intensified {OMZ} consistent with the enrichment of {M}o, {R}e, {C}d, {U}, and enhanced denitrification. {D}uring the {C}urrent {W}arm {P}eriod ({CWP};-1860 {CE} to present), the {BF} assemblages were more diverse, and the most abundant species were {B}olivina seminuda, {E}pistominella sp.1, {G}yroidina nitidula , and {S}uggrunda eckisi , an assemblage less tolerant to low dissolved oxygen conditions, together with lower concentrations of redox-sensitive elements and delta 15{N}sed , suggest weakening of the reducing conditions within the {OMZ}. {A}dditionally, our {BF} data showed evidence of the influence of the {P}acific {D}ecadal {O}scillation on bottom-water oxygenation. {B}ottom-water oxygenation changes appear to respond to increased solar forcing caused by {I}ntertropical {C}onvergence {Z}one migration and strengthened {P}acific {W}alker {C}irculation, which in turn modulated productivity, organic matter flux to the seabed, and oxygen consumption in the bottom water. {O}ur findings agree with previous studies further north from the study site, indicating these changes' regional scale.},
  keywords = {{O}xygen minimum zone ; {B}enthic foraminifera ; {T}race elements ; {L}ittle {I}ce {A}ge ; {C}urrent {W}arm {P}eriod ; {P}acific {D}ecadal {O}scillation ; {PACIFIQUE} ; {MEXIQUE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{P}alaeogeography {P}alaeoclimatology {P}alaeoecology},
  volume = {636},
  numero = {},
  pages = {111994 [13 ]},
  ISSN = {0031-0182},
  year = {2024},
  DOI = {10.1016/j.palaeo.2023.111994},
  URL = {https://www.documentation.ird.fr/hor/fdi:010089469},
}