@article{fdi:010046139, title = {{R}apid reorganization in ocean biogeochemistry off {P}eru towards the end of the {L}ittle {I}ce {A}ge}, author = {{G}utierrez, {D}. and {S}ifeddine, {A}bdelfettah and {F}ield, {D}. {B}. and {O}rtlieb, {L}uc and {V}argas, {G}. and {C}havez, {F}. {P}. and {V}elazco, {F}. and {F}erreira, {V}. and {T}apia, {P}. and {S}alvatteci, {R}. and {B}oucher, {H}ugues and {M}orales, {M}. {C}. and {V}aldes, {J}. and {R}eyss, {J}. {L}. and {C}ampusano, {A}. and {B}oussafir, {M}. and {M}andeng {Y}ogo, {M}agloire and {G}arcia, {M}arta and {B}aumgartner, {T}.}, editor = {}, language = {{ENG}}, abstract = {{C}limate and ocean ecosystem variability has been well recognized during the twentieth century but it is unclear if modern ocean biogeochemistry is susceptible to the large, abrupt shifts that characterized the {L}ate {Q}uaternary. {T}ime series from marine sediments off {P}eru show an abrupt centennial-scale biogeochemical regime shift in the early nineteenth century, of much greater magnitude and duration than present day multi-decadal variability. {A} rapid expansion of the subsurface nutrient-rich, oxygen-depleted waters resulted in the present-day higher biological productivity, including pelagic fish. {T}he shift was likely driven by a northward migration of the {I}ntertropical {C}onvergence {Z}one and the {S}outh {P}acific {S}ubtropical {H}igh to their present day locations, coupled with a strengthening of {W}alker circulation, towards the end of the {L}ittle {I}ce {A}ge. {T}hese findings reveal the potential for large reorganizations in tropical {P}acific climate with immediate effects on ocean biogeochemical cycling and ecosystem structure.}, keywords = {}, booktitle = {}, journal = {{B}iogeosciences}, volume = {6}, numero = {5}, pages = {835--848}, ISSN = {1726-4170}, year = {2009}, DOI = {10.5194/bg-6-835-2009}, URL = {https://www.documentation.ird.fr/hor/fdi:010046139}, }